Merge pull request #17 from gumbright/develop

Remove touch "flash" and make it work more like a UIButton

Author: loregr

LGButton/Classes/LGButton.swift

@@ -8,13 +8,22 @@
 import UIKit
 import QuartzCore
 
+
 @IBDesignable
 public class LGButton: UIControl {
 
+    enum TouchAlphaValues : CGFloat {
+        case touched = 0.7
+        case untouched = 1.0
+    }
+
+    let touchDisableRadius : CGFloat = 100.0
+
     let availableFontIcons = ["fa", "io", "oc", "ic", "ma", "ti", "mi"]
 
     var gradient : CAGradientLayer?
-
+    
+    
     fileprivate var rootView : UIView!
     @IBOutlet fileprivate weak var titleLbl: UILabel!
     @IBOutlet fileprivate weak var mainStackView: UIStackView!
@@ -589,16 +598,57 @@ public class LGButton: UIControl {
 
     // MARK: - Touches
     // MARK:
-    override public func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
-        if showTouchFeedback {
-            alpha = 0.7
-            UIView.animate(withDuration: 0.3) {
-                self.alpha = 1
+    var touchAlpha : TouchAlphaValues = .untouched {
+        didSet {
+            updateTouchAlpha()
+        }
+    }
+    
+    var pressed : Bool = false {
+        didSet {
+            if !showTouchFeedback {
+                return
             }
+            
+            touchAlpha = (pressed) ? .touched : .untouched
         }
     }
+
+    override public func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?){
+        pressed = true
+    }
+    
+    override public func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?){
+        let shouldSendActions = pressed
+        pressed = false
+        if shouldSendActions{
+            sendActions(for: .touchUpInside)
+        }
+    }
+    
+    override public func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?){
+        if let touchLoc = touches.first?.location(in: self){
+            if (touchLoc.x < -touchDisableRadius ||
+                touchLoc.y < -touchDisableRadius ||
+                touchLoc.x > self.bounds.size.width + touchDisableRadius ||
+                touchLoc.y > self.bounds.size.height + touchDisableRadius){
+                pressed = false
+            }
+            else if self.touchAlpha == .untouched {
+                pressed = true
+            }
+        }
+    }
+    
+    override public func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
+        pressed = false
+    }
 
-    override public func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
-        sendActions(for: .touchUpInside)
+    func updateTouchAlpha() {
+        if self.alpha != self.touchAlpha.rawValue {
+            UIView.animate(withDuration: 0.3) {
+                self.alpha = self.touchAlpha.rawValue
+            }
+        }
     }
 }