Merge pull request #2 from TouchInstinct/block_minimum_reached

Added block call when minimum is reached

.swift-version

@@ -0,0 +1 @@
+4.2

GMStepper.podspec

@@ -1,14 +1,16 @@
 Pod::Spec.new do |s|
   s.name             = "GMStepper"
-  s.version          = "1.2.0"
+  s.version          = "2.2.1"
   s.summary          = "A stepper with a sliding label in the middle."
   s.homepage         = "https://github.com/gmertk/GMStepper"
-  s.screenshots      = "https://dl.dropboxusercontent.com/u/4397140/pod-screenshots/screenshot_1.png"
+  s.screenshots      = "https://raw.githubusercontent.com/gmertk/GMStepper/master/Screenshots/screenshot_1.gif"
   s.license          = 'MIT'
-  s.author           = { "Gunay Mert Karadogan" => "mertkaradogan@gmail.com" }
+  s.authors          = { "Gunay Mert Karadogan" => "mertkaradogan@gmail.com",
+                         "Brent Whitman" => "brent@pathym.com" }
   s.source           = { :git => "https://github.com/gmertk/GMStepper.git", :tag => s.version.to_s }
   s.social_media_url = 'https://twitter.com/gunaymertk'
   s.platform     = :ios, '8.0'
   s.requires_arc = true
   s.source_files = 'GMStepper/*.swift'
+  s.swift_version = '4.2'
 end

GMStepper/GMStepper.swift

@@ -11,79 +11,96 @@ import UIKit
 @IBDesignable public class GMStepper: UIControl {
 
     /// Current value of the stepper. Defaults to 0.
-    @IBInspectable public var value: Double = 0 {
+    @objc @IBInspectable public var value: Double = 0 {
         didSet {
             value = min(maximumValue, max(minimumValue, value))
 
-            let isInteger = floor(value) == value
+            handleIsLimitReached()
-            
+
-            //
+            label.text = formattedValue
-            // If we have items, we will display them as steps
-            //
-            
-            if isInteger && stepValue == 1.0 && items.count > 0 {
-                label.text = items[Int(value)]
-            }
-            else if showIntegerIfDoubleIsInteger && isInteger {
-                label.text = String(stringInterpolationSegment: Int(value))
-            } else {
-                label.text = String(stringInterpolationSegment: value)
-            }
 
             if oldValue != value {
                 sendActions(for: .valueChanged)
             }
         }
     }
+    
+    private var formattedValue: String? {
+        let isInteger = Decimal(value).exponent >= 0
+        
+        // If we have items, we will display them as steps
+        if isInteger && stepValue == 1.0 && items.count > 0 {
+            return items[Int(value)]
+        }
+        else {
+            return formatter.string(from: NSNumber(value: value))
+        }
+    }
 
     /// Minimum value. Must be less than maximumValue. Defaults to 0.
-    @IBInspectable public var minimumValue: Double = 0 {
+    @objc @IBInspectable public var minimumValue: Double = 0 {
         didSet {
             value = min(maximumValue, max(minimumValue, value))
         }
     }
 
     /// Maximum value. Must be more than minimumValue. Defaults to 100.
-    @IBInspectable public var maximumValue: Double = 100 {
+    @objc @IBInspectable public var maximumValue: Double = 100 {
         didSet {
             value = min(maximumValue, max(minimumValue, value))
         }
     }
 
     /// Step/Increment value as in UIStepper. Defaults to 1.
-    @IBInspectable public var stepValue: Double = 1
+    @objc @IBInspectable public var stepValue: Double = 1 {
+        didSet {
+            setupNumberFormatter()
+        }
+    }
 
     /// The same as UIStepper's autorepeat. If true, holding on the buttons or keeping the pan gesture alters the value repeatedly. Defaults to true.
-    @IBInspectable public var autorepeat: Bool = true
+    @objc @IBInspectable public var autorepeat: Bool = true
 
     /// If the value is integer, it is shown without floating point.
-    @IBInspectable public var showIntegerIfDoubleIsInteger: Bool = true
+    @objc @IBInspectable public var showIntegerIfDoubleIsInteger: Bool = true {
-
-    /// Text on the left button. Be sure that it fits in the button. Defaults to "−".
-    @IBInspectable public var leftButtonText: String = "−" {
         didSet {
-            leftButton.setTitle(leftButtonText, for: .normal)
+            setupNumberFormatter()
         }
     }
 
-    /// Text on the right button. Be sure that it fits in the button. Defaults to "+".
+    /// Image on the left button. Defaults to nil.
-    @IBInspectable public var rightButtonText: String = "+" {
+    @objc @IBInspectable public var leftButtonImage: UIImage? = nil {
         didSet {
-            rightButton.setTitle(rightButtonText, for: .normal)
+            leftButton.setImage(leftButtonImage, for: .normal)
         }
     }
 
-    /// Text color of the buttons. Defaults to white.
+    /// Image on the right button. Defaults to nil.
-    @IBInspectable public var buttonsTextColor: UIColor = UIColor.white {
+    @objc @IBInspectable public var rightButtonImage: UIImage? = nil {
         didSet {
-            for button in [leftButton, rightButton] {
+            rightButton.setImage(rightButtonImage, for: .normal)
-                button.setTitleColor(buttonsTextColor, for: .normal)
-            }
         }
     }
 
+    /// Left button content insets. Defaults to ".zero".
+    @objc @IBInspectable public var leftButtonContentInsets: UIEdgeInsets = .zero {
+        didSet {
+            leftButton.contentEdgeInsets = leftButtonContentInsets
+        }
+    }
+
+    /// Right button content insets. Defaults to ".zero".
+    @objc @IBInspectable public var rightButtonContentInsets: UIEdgeInsets = .zero {
+        didSet {
+            rightButton.contentEdgeInsets = rightButtonContentInsets
+        }
+    }
+
+    /// Left button limit opacity. Defaults to "0.4".
+    @objc @IBInspectable public var leftButtonLimitOpacity: CGFloat = 0.4
+
     /// Background color of the buttons. Defaults to dark blue.
-    @IBInspectable public var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1) {
+    @objc @IBInspectable public var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1) {
         didSet {
             for button in [leftButton, rightButton] {
                 button.backgroundColor = buttonsBackgroundColor
@@ -92,38 +109,42 @@ import UIKit
         }
     }
 
-    /// Font of the buttons. Defaults to AvenirNext-Bold, 20.0 points in size.
+    /// Label tap closure
-    public var buttonsFont = UIFont(name: "AvenirNext-Bold", size: 20.0)! {
+    @objc public var didTouchLabel: ((Double) -> Void)?
-        didSet {
+    
-            for button in [leftButton, rightButton] {
+    /// Block is called when the minimum is exceeded
-                button.titleLabel?.font = buttonsFont
+    @objc public var minimumExceeded: (() -> Void)?
-            }
+    
-        }
-    }
-
     /// Text color of the middle label. Defaults to white.
-    @IBInspectable public var labelTextColor: UIColor = UIColor.white {
+    @objc @IBInspectable public var labelTextColor: UIColor = UIColor.white {
         didSet {
             label.textColor = labelTextColor
         }
     }
 
     /// Text color of the middle label. Defaults to lighter blue.
-    @IBInspectable public var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1) {
+    @objc @IBInspectable public var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1) {
         didSet {
             label.backgroundColor = labelBackgroundColor
         }
     }
 
     /// Font of the middle label. Defaults to AvenirNext-Bold, 25.0 points in size.
-    public var labelFont = UIFont(name: "AvenirNext-Bold", size: 25.0)! {
+    @objc public var labelFont = UIFont(name: "AvenirNext-Bold", size: 25.0)! {
         didSet {
             label.font = labelFont
         }
     }
+       /// Corner radius of the middle label. Defaults to 0.
+    @objc @IBInspectable public var labelCornerRadius: CGFloat = 0 {
+        didSet {
+            label.layer.cornerRadius = labelCornerRadius
+        
+            }
+    }
 
     /// Corner radius of the stepper's layer. Defaults to 4.0.
-    @IBInspectable public var cornerRadius: CGFloat = 4.0 {
+    @objc @IBInspectable public var cornerRadius: CGFloat = 4.0 {
         didSet {
             layer.cornerRadius = cornerRadius
             clipsToBounds = true
@@ -131,7 +152,7 @@ import UIKit
     }
     
     /// Border width of the stepper and middle label's layer. Defaults to 0.0.
-    @IBInspectable public var borderWidth: CGFloat = 0.0 {
+    @objc @IBInspectable public var borderWidth: CGFloat = 0.0 {
         didSet {
             layer.borderWidth = borderWidth
             label.layer.borderWidth = borderWidth
@@ -139,7 +160,7 @@ import UIKit
     }
     
     /// Color of the border of the stepper and middle label's layer. Defaults to clear color.
-    @IBInspectable public var borderColor: UIColor = UIColor.clear {
+    @objc @IBInspectable public var borderColor: UIColor = UIColor.clear {
         didSet {
             layer.borderColor = borderColor.cgColor
             label.layer.borderColor = borderColor.cgColor
@@ -147,7 +168,7 @@ import UIKit
     }
 
     /// Percentage of the middle label's width. Must be between 0 and 1. Defaults to 0.5. Be sure that it is wide enough to show the value.
-    @IBInspectable public var labelWidthWeight: CGFloat = 0.5 {
+    @objc @IBInspectable public var labelWidthWeight: CGFloat = 0.5 {
         didSet {
             labelWidthWeight = min(1, max(0, labelWidthWeight))
             setNeedsLayout()
@@ -155,8 +176,11 @@ import UIKit
     }
 
     /// Color of the flashing animation on the buttons in case the value hit the limit.
-    @IBInspectable public var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)
+    @objc @IBInspectable public var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)
 
+    /// Formatter for displaying the current value
+    let formatter = NumberFormatter()
+    
     /**
         Width of the sliding animation. When buttons clicked, the middle label does a slide animation towards to the clicked button. Defaults to 5.
     */
@@ -170,43 +194,41 @@ import UIKit
 
     lazy var leftButton: UIButton = {
         let button = UIButton()
-        button.setTitle(self.leftButtonText, for: .normal)
+        button.setImage(self.leftButtonImage, for: .normal)
-        button.setTitleColor(self.buttonsTextColor, for: .normal)
         button.backgroundColor = self.buttonsBackgroundColor
-        button.titleLabel?.font = self.buttonsFont
         button.addTarget(self, action: #selector(GMStepper.leftButtonTouchDown), for: .touchDown)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpInside)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpOutside)
+        button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchCancel)
         return button
     }()
 
     lazy var rightButton: UIButton = {
         let button = UIButton()
-        button.setTitle(self.rightButtonText, for: .normal)
+        button.setImage(self.rightButtonImage, for: .normal)
-        button.setTitleColor(self.buttonsTextColor, for: .normal)
         button.backgroundColor = self.buttonsBackgroundColor
-        button.titleLabel?.font = self.buttonsFont
         button.addTarget(self, action: #selector(GMStepper.rightButtonTouchDown), for: .touchDown)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpInside)
         button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpOutside)
+        button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchCancel)
         return button
     }()
 
     lazy var label: UILabel = {
         let label = UILabel()
         label.textAlignment = .center
-        if self.showIntegerIfDoubleIsInteger && floor(self.value) == self.value {
+        label.text = formattedValue
-            label.text = String(stringInterpolationSegment: Int(self.value))
-        } else {
-            label.text = String(stringInterpolationSegment: self.value)
-        }
         label.textColor = self.labelTextColor
         label.backgroundColor = self.labelBackgroundColor
         label.font = self.labelFont
+        label.layer.cornerRadius = self.labelCornerRadius
+        label.layer.masksToBounds = true
         label.isUserInteractionEnabled = true
         let panRecognizer = UIPanGestureRecognizer(target: self, action: #selector(GMStepper.handlePan))
         panRecognizer.maximumNumberOfTouches = 1
         label.addGestureRecognizer(panRecognizer)
+        let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(GMStepper.handleLabelTap))
+        label.addGestureRecognizer(tapRecognizer)
         return label
     }()
 
@@ -234,26 +256,9 @@ import UIKit
     }
     
     
-    public var items : [String] = [] {
+    @objc public var items : [String] = [] {
         didSet {
-            let isInteger = floor(value) == value
+            label.text = formattedValue
-            
-            //
-            // If we have items, we will display them as steps
-            //
-            
-            if isInteger && stepValue == 1.0 && items.count > 0 {
-                
-                var value = Int(self.value)
-                
-                if value >= items.count {
-                    value = items.count - 1
-                    self.value = Double(value)
-                }
-                else {
-                    label.text = items[value]
-                }
-            }
         }
     }
 
@@ -280,26 +285,38 @@ import UIKit
         }
     }
 
-    required public init?(coder aDecoder: NSCoder) {
+    @objc required public init?(coder aDecoder: NSCoder) {
         super.init(coder: aDecoder)
         setup()
     }
 
-    public override init(frame: CGRect) {
+    @objc public override init(frame: CGRect) {
         super.init(frame: frame)
         setup()
     }
 
-    func setup() {
+    fileprivate func setup() {
         addSubview(leftButton)
         addSubview(rightButton)
         addSubview(label)
 
+        handleIsLimitReached()
         backgroundColor = buttonsBackgroundColor
         layer.cornerRadius = cornerRadius
         clipsToBounds = true
+        labelOriginalCenter = label.center
 
-        NotificationCenter.default.addObserver(self, selector: #selector(GMStepper.reset), name: NSNotification.Name.UIApplicationWillResignActive, object: nil)
+        setupNumberFormatter()
+        
+        NotificationCenter.default.addObserver(self, selector: #selector(GMStepper.reset), name: UIApplication.willResignActiveNotification, object: nil)
+    }
+    
+    func setupNumberFormatter() {
+        let decValue = Decimal(stepValue)
+        let digits = decValue.significantFractionalDecimalDigits
+        formatter.minimumIntegerDigits = 1
+        formatter.minimumFractionDigits = showIntegerIfDoubleIsInteger ? 0 : digits
+        formatter.maximumFractionDigits = digits
     }
 
     public override func layoutSubviews() {
@@ -320,8 +337,9 @@ import UIKit
             value += stepValue
         } else if stepperState == .ShouldDecrease {
             value -= stepValue
-        }   
+        }
     }
+    
 
     deinit {
         resetTimer()
@@ -344,7 +362,7 @@ import UIKit
 
 // MARK: Pan Gesture
 extension GMStepper {
-    func handlePan(gesture: UIPanGestureRecognizer) {
+    @objc func handlePan(gesture: UIPanGestureRecognizer) {
         switch gesture.state {
         case .began:
             leftButton.isEnabled = false
@@ -394,7 +412,11 @@ extension GMStepper {
         }
     }
 
-    func reset() {
+    @objc func handleLabelTap() {
+        didTouchLabel?(value)
+    }
+
+    @objc func reset() {
         panState = .Stable
         stepperState = .Stable
         resetTimer()
@@ -413,21 +435,21 @@ extension GMStepper {
 
 // MARK: Button Events
 extension GMStepper {
-    func leftButtonTouchDown(button: UIButton) {
+    @objc func leftButtonTouchDown(button: UIButton) {
         rightButton.isEnabled = false
         label.isUserInteractionEnabled = false
         resetTimer()
 
         if value == minimumValue {
             animateLimitHitIfNeeded()
+            minimumExceeded?()
         } else {
             stepperState = .ShouldDecrease
             animateSlideLeft()
         }
-
     }
 
-    func rightButtonTouchDown(button: UIButton) {
+    @objc func rightButtonTouchDown(button: UIButton) {
         leftButton.isEnabled = false
         label.isUserInteractionEnabled = false
         resetTimer()
@@ -440,7 +462,7 @@ extension GMStepper {
         }
     }
 
-    func buttonTouchUp(button: UIButton) {
+    @objc func buttonTouchUp(button: UIButton) {
         reset()
     }
 }
@@ -485,7 +507,7 @@ extension GMStepper {
 
 // MARK: Timer
 extension GMStepper {
-    func handleTimerFire(timer: Timer) {
+    @objc func handleTimerFire(timer: Timer) {
         timerFireCount += 1
 
         if timerFireCount % timerFireCountModulo == 0 {
@@ -504,6 +526,19 @@ extension GMStepper {
             timerFireCount = 0
         }
     }
-
+}
-
+
+private extension GMStepper {
+
+    func handleIsLimitReached() {
+        let isLimitReached = value == minimumValue
+        leftButton.alpha = isLimitReached ? leftButtonLimitOpacity : 1
+    }
+}
+
+extension Decimal {
+    
+    var significantFractionalDecimalDigits: Int {
+        return max(-exponent, 0)
+    }
 }

GMStepperExample/GMStepperExample.xcodeproj/project.pbxproj

@@ -7,18 +7,18 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		3169DD3E1B496C33009791D1 /* GMStepper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 319C195B1B48445E005EFEE5 /* GMStepper.swift */; };
+		3116C0DB1DA4DD360015AC69 /* GMStepperExampleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 3116C0DA1DA4DD360015AC69 /* GMStepperExampleTests.swift */; };
+		3198AC771DA4DEE500311FB3 /* GMStepper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 319C195B1B48445E005EFEE5 /* GMStepper.swift */; };
 		319C19381B4843EB005EFEE5 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 319C19371B4843EB005EFEE5 /* AppDelegate.swift */; };
 		319C193A1B4843EB005EFEE5 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 319C19391B4843EB005EFEE5 /* ViewController.swift */; };
 		319C193D1B4843EB005EFEE5 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 319C193B1B4843EB005EFEE5 /* Main.storyboard */; };
 		319C193F1B4843EB005EFEE5 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 319C193E1B4843EB005EFEE5 /* Images.xcassets */; };
 		319C19421B4843EB005EFEE5 /* LaunchScreen.xib in Resources */ = {isa = PBXBuildFile; fileRef = 319C19401B4843EB005EFEE5 /* LaunchScreen.xib */; };
-		319C194E1B4843EB005EFEE5 /* GMStepperExampleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 319C194D1B4843EB005EFEE5 /* GMStepperExampleTests.swift */; };
 		319C195C1B48445E005EFEE5 /* GMStepper.swift in Sources */ = {isa = PBXBuildFile; fileRef = 319C195B1B48445E005EFEE5 /* GMStepper.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
-		319C19481B4843EB005EFEE5 /* PBXContainerItemProxy */ = {
+		3116C0DD1DA4DD360015AC69 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = 319C192A1B4843EB005EFEE5 /* Project object */;
 			proxyType = 1;
@@ -28,6 +28,9 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		3116C0D81DA4DD360015AC69 /* GMStepperExampleTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = GMStepperExampleTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		3116C0DA1DA4DD360015AC69 /* GMStepperExampleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GMStepperExampleTests.swift; sourceTree = "<group>"; };
+		3116C0DC1DA4DD360015AC69 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		319C19321B4843EB005EFEE5 /* GMStepperExample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = GMStepperExample.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		319C19361B4843EB005EFEE5 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		319C19371B4843EB005EFEE5 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@@ -35,21 +38,18 @@
 		319C193C1B4843EB005EFEE5 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 		319C193E1B4843EB005EFEE5 /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
 		319C19411B4843EB005EFEE5 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.xib; name = Base; path = Base.lproj/LaunchScreen.xib; sourceTree = "<group>"; };
-		319C19471B4843EB005EFEE5 /* GMStepperExampleTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = GMStepperExampleTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
-		319C194C1B4843EB005EFEE5 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
-		319C194D1B4843EB005EFEE5 /* GMStepperExampleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GMStepperExampleTests.swift; sourceTree = "<group>"; };
 		319C195B1B48445E005EFEE5 /* GMStepper.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GMStepper.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
-		319C192F1B4843EB005EFEE5 /* Frameworks */ = {
+		3116C0D51DA4DD360015AC69 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		319C19441B4843EB005EFEE5 /* Frameworks */ = {
+		319C192F1B4843EB005EFEE5 /* Frameworks */ = {
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
@@ -59,12 +59,21 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		3116C0D91DA4DD360015AC69 /* GMStepperExampleTests */ = {
+			isa = PBXGroup;
+			children = (
+				3116C0DA1DA4DD360015AC69 /* GMStepperExampleTests.swift */,
+				3116C0DC1DA4DD360015AC69 /* Info.plist */,
+			);
+			path = GMStepperExampleTests;
+			sourceTree = "<group>";
+		};
 		319C19291B4843EB005EFEE5 = {
 			isa = PBXGroup;
 			children = (
 				319C195A1B48445E005EFEE5 /* GMStepper */,
 				319C19341B4843EB005EFEE5 /* GMStepperExample */,
-				319C194A1B4843EB005EFEE5 /* GMStepperExampleTests */,
+				3116C0D91DA4DD360015AC69 /* GMStepperExampleTests */,
 				319C19331B4843EB005EFEE5 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -73,7 +82,7 @@
 			isa = PBXGroup;
 			children = (
 				319C19321B4843EB005EFEE5 /* GMStepperExample.app */,
-				319C19471B4843EB005EFEE5 /* GMStepperExampleTests.xctest */,
+				3116C0D81DA4DD360015AC69 /* GMStepperExampleTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -99,23 +108,6 @@
 			name = "Supporting Files";
 			sourceTree = "<group>";
 		};
-		319C194A1B4843EB005EFEE5 /* GMStepperExampleTests */ = {
-			isa = PBXGroup;
-			children = (
-				319C194D1B4843EB005EFEE5 /* GMStepperExampleTests.swift */,
-				319C194B1B4843EB005EFEE5 /* Supporting Files */,
-			);
-			path = GMStepperExampleTests;
-			sourceTree = "<group>";
-		};
-		319C194B1B4843EB005EFEE5 /* Supporting Files */ = {
-			isa = PBXGroup;
-			children = (
-				319C194C1B4843EB005EFEE5 /* Info.plist */,
-			);
-			name = "Supporting Files";
-			sourceTree = "<group>";
-		};
 		319C195A1B48445E005EFEE5 /* GMStepper */ = {
 			isa = PBXGroup;
 			children = (
@@ -128,6 +120,24 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
+		3116C0D71DA4DD360015AC69 /* GMStepperExampleTests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 3116C0DF1DA4DD360015AC69 /* Build configuration list for PBXNativeTarget "GMStepperExampleTests" */;
+			buildPhases = (
+				3116C0D41DA4DD360015AC69 /* Sources */,
+				3116C0D51DA4DD360015AC69 /* Frameworks */,
+				3116C0D61DA4DD360015AC69 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				3116C0DE1DA4DD360015AC69 /* PBXTargetDependency */,
+			);
+			name = GMStepperExampleTests;
+			productName = GMStepperExampleTests;
+			productReference = 3116C0D81DA4DD360015AC69 /* GMStepperExampleTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 		319C19311B4843EB005EFEE5 /* GMStepperExample */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = 319C19511B4843EB005EFEE5 /* Build configuration list for PBXNativeTarget "GMStepperExample" */;
@@ -145,24 +155,6 @@
 			productReference = 319C19321B4843EB005EFEE5 /* GMStepperExample.app */;
 			productType = "com.apple.product-type.application";
 		};
-		319C19461B4843EB005EFEE5 /* GMStepperExampleTests */ = {
-			isa = PBXNativeTarget;
-			buildConfigurationList = 319C19541B4843EB005EFEE5 /* Build configuration list for PBXNativeTarget "GMStepperExampleTests" */;
-			buildPhases = (
-				319C19431B4843EB005EFEE5 /* Sources */,
-				319C19441B4843EB005EFEE5 /* Frameworks */,
-				319C19451B4843EB005EFEE5 /* Resources */,
-			);
-			buildRules = (
-			);
-			dependencies = (
-				319C19491B4843EB005EFEE5 /* PBXTargetDependency */,
-			);
-			name = GMStepperExampleTests;
-			productName = GMStepperExampleTests;
-			productReference = 319C19471B4843EB005EFEE5 /* GMStepperExampleTests.xctest */;
-			productType = "com.apple.product-type.bundle.unit-test";
-		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -170,20 +162,20 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftMigration = 0700;
-				LastSwiftUpdateCheck = 0700;
+				LastSwiftUpdateCheck = 0800;
-				LastUpgradeCheck = 0800;
+				LastUpgradeCheck = 0900;
 				ORGANIZATIONNAME = "Gunay Mert Karadogan";
 				TargetAttributes = {
+					3116C0D71DA4DD360015AC69 = {
+						CreatedOnToolsVersion = 8.0;
+						LastSwiftMigration = 1000;
+						ProvisioningStyle = Automatic;
+						TestTargetID = 319C19311B4843EB005EFEE5;
+					};
 					319C19311B4843EB005EFEE5 = {
 						CreatedOnToolsVersion = 6.4;
 						DevelopmentTeam = 289M6XEDV4;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 1000;
-					};
-					319C19461B4843EB005EFEE5 = {
-						CreatedOnToolsVersion = 6.4;
-						DevelopmentTeam = 289M6XEDV4;
-						LastSwiftMigration = 0800;
-						TestTargetID = 319C19311B4843EB005EFEE5;
 					};
 				};
 			};
@@ -201,12 +193,19 @@
 			projectRoot = "";
 			targets = (
 				319C19311B4843EB005EFEE5 /* GMStepperExample */,
-				319C19461B4843EB005EFEE5 /* GMStepperExampleTests */,
+				3116C0D71DA4DD360015AC69 /* GMStepperExampleTests */,
 			);
 		};
 /* End PBXProject section */
 
 /* Begin PBXResourcesBuildPhase section */
+		3116C0D61DA4DD360015AC69 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		319C19301B4843EB005EFEE5 /* Resources */ = {
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -217,16 +216,18 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		319C19451B4843EB005EFEE5 /* Resources */ = {
-			isa = PBXResourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
+		3116C0D41DA4DD360015AC69 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				3116C0DB1DA4DD360015AC69 /* GMStepperExampleTests.swift in Sources */,
+				3198AC771DA4DEE500311FB3 /* GMStepper.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 		319C192E1B4843EB005EFEE5 /* Sources */ = {
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
@@ -237,22 +238,13 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
-		319C19431B4843EB005EFEE5 /* Sources */ = {
-			isa = PBXSourcesBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-				319C194E1B4843EB005EFEE5 /* GMStepperExampleTests.swift in Sources */,
-				3169DD3E1B496C33009791D1 /* GMStepper.swift in Sources */,
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-		};
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
-		319C19491B4843EB005EFEE5 /* PBXTargetDependency */ = {
+		3116C0DE1DA4DD360015AC69 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
 			target = 319C19311B4843EB005EFEE5 /* GMStepperExample */;
-			targetProxy = 319C19481B4843EB005EFEE5 /* PBXContainerItemProxy */;
+			targetProxy = 3116C0DD1DA4DD360015AC69 /* PBXContainerItemProxy */;
 		};
 /* End PBXTargetDependency section */
 
@@ -276,6 +268,42 @@
 /* End PBXVariantGroup section */
 
 /* Begin XCBuildConfiguration section */
+		3116C0E01DA4DD360015AC69 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_SUSPICIOUS_MOVES = YES;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				INFOPLIST_FILE = GMStepperExampleTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = com.gmertk.GMStepperExampleTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
+				SWIFT_VERSION = 4.2;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/GMStepperExample.app/GMStepperExample";
+			};
+			name = Debug;
+		};
+		3116C0E11DA4DD360015AC69 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				BUNDLE_LOADER = "$(TEST_HOST)";
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_SUSPICIOUS_MOVES = YES;
+				INFOPLIST_FILE = GMStepperExampleTests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = com.gmertk.GMStepperExampleTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.2;
+				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/GMStepperExample.app/GMStepperExample";
+			};
+			name = Release;
+		};
 		319C194F1B4843EB005EFEE5 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
@@ -284,14 +312,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -331,14 +365,20 @@
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
 				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -369,10 +409,11 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				DEVELOPMENT_TEAM = 289M6XEDV4;
 				INFOPLIST_FILE = GMStepperExample/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.gunaymert.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -382,56 +423,26 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				DEVELOPMENT_TEAM = 289M6XEDV4;
 				INFOPLIST_FILE = GMStepperExample/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.gunaymert.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
-			};
-			name = Release;
-		};
-		319C19551B4843EB005EFEE5 /* Debug */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				DEVELOPMENT_TEAM = 289M6XEDV4;
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(SDKROOT)/Developer/Library/Frameworks",
-					"$(inherited)",
-				);
-				GCC_PREPROCESSOR_DEFINITIONS = (
-					"DEBUG=1",
-					"$(inherited)",
-				);
-				INFOPLIST_FILE = GMStepperExampleTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				PRODUCT_BUNDLE_IDENTIFIER = "com.gunaymert.$(PRODUCT_NAME:rfc1034identifier)";
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/GMStepperExample.app/GMStepperExample";
-			};
-			name = Debug;
-		};
-		319C19561B4843EB005EFEE5 /* Release */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				BUNDLE_LOADER = "$(TEST_HOST)";
-				DEVELOPMENT_TEAM = 289M6XEDV4;
-				FRAMEWORK_SEARCH_PATHS = (
-					"$(SDKROOT)/Developer/Library/Frameworks",
-					"$(inherited)",
-				);
-				INFOPLIST_FILE = GMStepperExampleTests/Info.plist;
-				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				PRODUCT_BUNDLE_IDENTIFIER = "com.gunaymert.$(PRODUCT_NAME:rfc1034identifier)";
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 3.0;
-				TEST_HOST = "$(BUILT_PRODUCTS_DIR)/GMStepperExample.app/GMStepperExample";
 			};
 			name = Release;
 		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
+		3116C0DF1DA4DD360015AC69 /* Build configuration list for PBXNativeTarget "GMStepperExampleTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				3116C0E01DA4DD360015AC69 /* Debug */,
+				3116C0E11DA4DD360015AC69 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
 		319C192D1B4843EB005EFEE5 /* Build configuration list for PBXProject "GMStepperExample" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
@@ -450,15 +461,6 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		319C19541B4843EB005EFEE5 /* Build configuration list for PBXNativeTarget "GMStepperExampleTests" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				319C19551B4843EB005EFEE5 /* Debug */,
-				319C19561B4843EB005EFEE5 /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
 /* End XCConfigurationList section */
 	};
 	rootObject = 319C192A1B4843EB005EFEE5 /* Project object */;

GMStepperExample/GMStepperExample.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

GMStepperExample/GMStepperExample/AppDelegate.swift

@@ -14,33 +14,33 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     var window: UIWindow?
 
 
-    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
+    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         // Override point for customization after application launch.
         return true
     }
 
-    func applicationWillResignActive(application: UIApplication) {
+    func applicationWillResignActive(_ application: UIApplication) {
         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
-        // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
+        // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
     }
 
-    func applicationDidEnterBackground(application: UIApplication) {
+    func applicationDidEnterBackground(_ application: UIApplication) {
         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
     }
 
-    func applicationWillEnterForeground(application: UIApplication) {
+    func applicationWillEnterForeground(_ application: UIApplication) {
-        // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
+        // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
     }
 
-    func applicationDidBecomeActive(application: UIApplication) {
+    func applicationDidBecomeActive(_ application: UIApplication) {
         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
     }
 
-    func applicationWillTerminate(application: UIApplication) {
+    func applicationWillTerminate(_ application: UIApplication) {
         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
     }
-
+    
-
+    
 }
 

GMStepperExample/GMStepperExample/Base.lproj/Main.storyboard

@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10116" systemVersion="15E65" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="vXZ-lx-hvc">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="11201" systemVersion="15G31" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="vXZ-lx-hvc">
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="11161"/>
         <capability name="Constraints to layout margins" minToolsVersion="6.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
         <!--View Controller-->
@@ -15,12 +16,11 @@
                         <viewControllerLayoutGuide type="bottom" id="2fi-mo-0CV"/>
                     </layoutGuides>
                     <view key="view" contentMode="scaleToFill" id="kh9-bI-dsS">
-                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                         <subviews>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="AU6-4C-B2F" customClass="GMStepper" customModule="GMStepperExample" customModuleProvider="target">
-                                <rect key="frame" x="28" y="28" width="544" height="44"/>
+                                <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                                 <constraints>
                                     <constraint firstAttribute="height" constant="44" id="6mC-hP-wFD"/>
                                 </constraints>
@@ -34,77 +34,74 @@
                                 </userDefinedRuntimeAttributes>
                             </view>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="if7-U5-bAM" customClass="GMStepper" customModule="GMStepperExample" customModuleProvider="target">
-                                <rect key="frame" x="140" y="116" width="320" height="66"/>
+                                <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                                 <constraints>
                                     <constraint firstAttribute="height" constant="66" id="iQi-6P-vt9"/>
                                     <constraint firstAttribute="width" constant="320" id="ji4-Pf-1fZ"/>
                                 </constraints>
                                 <userDefinedRuntimeAttributes>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsBackgroundColor">
-                                        <color key="value" red="1" green="0.3591497541" blue="0.36842127060000002" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="1" green="0.3591497541" blue="0.36842127060000002" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelTextColor">
-                                        <color key="value" red="1" green="0.3591497541" blue="0.36842127060000002" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="1" green="0.3591497541" blue="0.36842127060000002" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelBackgroundColor">
-                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsTextColor">
-                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="limitHitAnimationColor">
-                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="number" keyPath="stepValue">
-                                        <real key="value" value="0.5"/>
+                                        <real key="value" value="0.1"/>
                                     </userDefinedRuntimeAttribute>
                                 </userDefinedRuntimeAttributes>
                             </view>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="R9n-I0-fq7" customClass="GMStepper" customModule="GMStepperExample" customModuleProvider="target">
-                                <rect key="frame" x="200" y="226" width="200" height="66"/>
+                                <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="200" id="dVu-w0-mf0"/>
                                     <constraint firstAttribute="height" constant="66" id="ie8-vl-NAV"/>
                                 </constraints>
                                 <userDefinedRuntimeAttributes>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsBackgroundColor">
-                                        <color key="value" red="0.1819814891" green="0.69426733259999995" blue="0.53024792669999998" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.1819814891" green="0.69426733259999995" blue="0.53024792669999998" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelTextColor">
-                                        <color key="value" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                                        <color key="value" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelBackgroundColor">
-                                        <color key="value" red="0.6588235294" green="0.85882352939999995" blue="0.6588235294" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.6588235294" green="0.85882352939999995" blue="0.6588235294" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsTextColor">
-                                        <color key="value" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                                        <color key="value" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="limitHitAnimationColor">
-                                        <color key="value" red="0.6588235294" green="0.85882352939999995" blue="0.6588235294" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.6588235294" green="0.85882352939999995" blue="0.6588235294" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                 </userDefinedRuntimeAttributes>
                             </view>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="U8X-8Z-7Mo" customClass="GMStepper" customModule="GMStepperExample" customModuleProvider="target">
-                                <rect key="frame" x="28" y="336" width="544" height="44"/>
+                                <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                                 <constraints>
                                     <constraint firstAttribute="height" constant="44" id="aF3-T7-dIP"/>
                                     <constraint firstAttribute="width" constant="200" id="vhP-7K-vOu"/>
                                 </constraints>
                                 <userDefinedRuntimeAttributes>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsBackgroundColor">
-                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.90823972230000005" green="0.92638683320000004" blue="0.93171715740000005" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelTextColor">
-                                        <color key="value" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                                        <color key="value" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelBackgroundColor">
-                                        <color key="value" red="0.98624199629999998" green="0.77968657019999998" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.98624199629999998" green="0.77968657019999998" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsTextColor">
-                                        <color key="value" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                                        <color key="value" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="number" keyPath="labelWidthWeight">
                                         <real key="value" value="0.69999999999999996"/>
@@ -115,7 +112,7 @@
                                         <integer key="value" value="0"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="limitHitAnimationColor">
-                                        <color key="value" red="0.98624199629999998" green="0.77968657019999998" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="0.98624199629999998" green="0.77968657019999998" blue="0.0" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="number" keyPath="maximumValue">
                                         <integer key="value" value="100"/>
@@ -128,8 +125,7 @@
                                 </variation>
                             </view>
                             <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="9Ri-Yr-sRs" customClass="GMStepper" customModule="GMStepperExample" customModuleProvider="target">
-                                <rect key="frame" x="210" y="424" width="180" height="50"/>
+                                <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                                <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
                                 <constraints>
                                     <constraint firstAttribute="width" constant="180" id="dhO-Nd-SFk"/>
                                     <constraint firstAttribute="height" constant="50" id="xPS-vU-cZc"/>
@@ -148,24 +144,24 @@
                                         <real key="value" value="4"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsBackgroundColor">
-                                        <color key="value" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                                        <color key="value" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="buttonsTextColor">
-                                        <color key="value" red="1" green="0.47058823529999999" blue="0.15686274510000001" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="1" green="0.47058823529999999" blue="0.15686274510000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="borderColor">
-                                        <color key="value" red="1" green="0.47058823529999999" blue="0.15686274510000001" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="1" green="0.47058823529999999" blue="0.15686274510000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelBackgroundColor">
-                                        <color key="value" white="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+                                        <color key="value" red="0.0" green="0.0" blue="0.0" alpha="0.0" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                     <userDefinedRuntimeAttribute type="color" keyPath="labelTextColor">
-                                        <color key="value" red="1" green="0.47058823529999999" blue="0.15686274510000001" alpha="1" colorSpace="calibratedRGB"/>
+                                        <color key="value" red="1" green="0.47058823529999999" blue="0.15686274510000001" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                                     </userDefinedRuntimeAttribute>
                                 </userDefinedRuntimeAttributes>
                             </view>
                         </subviews>
-                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <constraints>
                             <constraint firstItem="R9n-I0-fq7" firstAttribute="centerX" secondItem="U8X-8Z-7Mo" secondAttribute="centerX" id="3cD-WW-Qg4"/>
                             <constraint firstItem="if7-U5-bAM" firstAttribute="top" secondItem="AU6-4C-B2F" secondAttribute="bottom" constant="44" id="662-W9-CUn"/>

GMStepperExample/GMStepperExample/ViewController.swift

@@ -16,7 +16,7 @@ class ViewController: UIViewController {
         stepper.addTarget(self, action: #selector(ViewController.stepperValueChanged), for: .valueChanged)
     }
 
-    func stepperValueChanged(stepper: GMStepper) {
+    @objc func stepperValueChanged(stepper: GMStepper) {
         print(stepper.value, terminator: "")
     }
 }

GMStepperExample/GMStepperExampleTests/GMStepperExampleTests.swift

@@ -6,8 +6,8 @@
 //  Copyright (c) 2015 Gunay Mert Karadogan. All rights reserved.
 //
 
-import UIKit
 import XCTest
+import UIKit
 
 class GMStepperExampleTests: XCTestCase {
     var stepper: GMStepper!
@@ -37,6 +37,6 @@ class GMStepperExampleTests: XCTestCase {
 
         XCTAssert(stepper.value == stepper.maximumValue, "Pass")
     }
-
+    
-
+    
 }

GMStepperExample/GMStepperExampleTests/Info.plist

@@ -16,8 +16,6 @@
 	<string>BNDL</string>
 	<key>CFBundleShortVersionString</key>
 	<string>1.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
 	<key>CFBundleVersion</key>
 	<string>1</string>
 </dict>

README.md

@@ -5,6 +5,7 @@
 
 A stepper with a sliding label in the middle. Pan the label or tap the buttons. Check out the tutorial, [How to Build a Custom Stepper - Part 1](http://gmertk.github.io/custom-stepper-part-1/).
 
+
 ## Screenshot
 
 ![Screenshot_1.gif](https://raw.githubusercontent.com/gmertk/GMStepper/master/Screenshots/screenshot_1.gif)
@@ -68,6 +69,9 @@ var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alph
 /// Font of the middle label. Defaults to AvenirNext-Bold, 25.0 points in size.
 var labelFont = UIFont(name: "AvenirNext-Bold", size: 25.0)
 
+/// Corner radius of the middle label's layer. Defaults to 0.0.
+var labelCornerRadius: CGFloat = 0.0
+
 /// Corner radius of the stepper's layer. Defaults to 4.0.
 var cornerRadius: CGFloat = 4.0
 
@@ -85,9 +89,10 @@ var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, al
 ```
 
 
-## Author
+## Authors
 
-Günay Mert Karadoğan, mertkaradogan@gmail.com
+* [Brent Whitman](https://github.com/bwhtmn) - Maintainer
+* [Günay Mert Karadoğan](https://github.com/gmertk) - Creator
 
 ## License