Add Refresh Control

TIUIElements/README.md

@@ -1,6 +1,8 @@
 # TIUIElements
 
-Bunch of useful protocols and views.
+Bunch of useful protocols and views:
+
+- RefreshControl - a basic UIRefreshControl with fixed refresh action.
 
 # Installation via SPM
 

TIUIElements/Sources/Views/RefreshControl/RefreshControl.swift

@@ -0,0 +1,45 @@
+import UIKit
+
+open class RefreshControl: UIRefreshControl {
+    private var action: Selector?
+    private var target: NSObjectProtocol?
+
+    public override func addTarget(_ target: Any?, action: Selector, for controlEvents: UIControl.Event) {
+        guard case .valueChanged = controlEvents else {
+            return super.addTarget(target, action: action, for: controlEvents)
+        }
+
+        self.action = action
+        self.target = target as? NSObjectProtocol
+    }
+
+    public override func removeTarget(_ target: Any?, action: Selector?, for controlEvents: UIControl.Event) {
+        guard self.action == action, self.target?.isEqual(target) ?? false else {
+            super.removeTarget(target, action: action, for: controlEvents)
+            return
+        }
+        
+        self.action = nil
+        self.target = nil
+    }
+    
+    public override func sendActions(for controlEvents: UIControl.Event) {
+        guard case .valueChanged = controlEvents else {
+            return super.sendActions(for: controlEvents)
+        }
+
+        if action != nil, target != nil {
+            performRefreshAction()
+        }
+    }
+
+    private func performRefreshAction() {
+        CFRunLoopPerformBlock(CFRunLoopGetMain(), CFRunLoopMode.defaultMode.rawValue) { [weak self] in
+            guard let action = self?.action else {
+                return
+            }
+
+            self?.target?.perform(action)
+        }
+    }
+}