diff --git a/Classes/RMRPullToRefreshController.swift b/Classes/RMRPullToRefreshController.swift
index 599b2a7..d27b29b 100644
--- a/Classes/RMRPullToRefreshController.swift
+++ b/Classes/RMRPullToRefreshController.swift
@@ -8,7 +8,7 @@
 
 import UIKit
 
-open class RMRPullToRefreshController: NSObject {
+open class RMRPullToRefreshController {
 
     // MARK: - Vars
     
@@ -48,8 +48,7 @@ open class RMRPullToRefreshController: NSObject {
     // MARK: - Init
     
     init(scrollView: UIScrollView, position:RMRPullToRefreshPosition, actionHandler: @escaping () -> Void) {
-
-        super.init()        
+ 
         self.scrollView = scrollView
         self.actionHandler = actionHandler
         self.position = position
@@ -157,9 +156,14 @@ open class RMRPullToRefreshController: NSObject {
                     }
                 }
                 self?.contentSizeWhenStartLoading = nil
-                self?.perform(#selector(self?.resetBackgroundViewHeightConstraint), with: nil, afterDelay: afterDelay)
+                
+                DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + afterDelay) {
+                    self?.resetBackgroundViewHeightConstraint()
+                }
+            }
+            DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + afterDelay) {
+                self?.stopAllAnimations()
             }
-            self?.perform(#selector(self?.stopAllAnimations), with: nil, afterDelay: afterDelay)
         })
     }
     
diff --git a/Example/RMRPullToRefresh/Base.lproj/Main.storyboard b/Example/RMRPullToRefresh/Base.lproj/Main.storyboard
index 440c9be..88cd43d 100644
--- a/Example/RMRPullToRefresh/Base.lproj/Main.storyboard
+++ b/Example/RMRPullToRefresh/Base.lproj/Main.storyboard
@@ -245,7 +245,7 @@
                 </tableViewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="2e9-Jk-9A8" userLabel="First Responder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="269" y="324"/>
+            <point key="canvasLocation" x="143" y="323"/>
         </scene>
         <!--View Controller-->
         <scene sceneID="tne-QT-ifu">
diff --git a/Example/RMRPullToRefreshExample.xcodeproj/project.pbxproj b/Example/RMRPullToRefreshExample.xcodeproj/project.pbxproj
index 07510dd..26df298 100644
--- a/Example/RMRPullToRefreshExample.xcodeproj/project.pbxproj
+++ b/Example/RMRPullToRefreshExample.xcodeproj/project.pbxproj
@@ -372,8 +372,10 @@
 			baseConfigurationReference = 51A8D36C5CCC1E18D2666CD6 /* Pods-RMRPullToRefreshExample.debug.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				DEVELOPMENT_TEAM = GMD7EK7S94;
 				FRAMEWORK_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = RMRPullToRefresh/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.redmadrobot.RMRPullToRefresh;
 				PRODUCT_NAME = RMRPullToRefreshExample;
@@ -386,8 +388,10 @@
 			baseConfigurationReference = 9373B01A0C7A0314295D05D2 /* Pods-RMRPullToRefreshExample.release.xcconfig */;
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				DEVELOPMENT_TEAM = GMD7EK7S94;
 				FRAMEWORK_SEARCH_PATHS = "$(inherited)";
 				INFOPLIST_FILE = RMRPullToRefresh/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = com.redmadrobot.RMRPullToRefresh;
 				PRODUCT_NAME = RMRPullToRefreshExample;