Temp

submodules/Display/Source/ShakeAnimation.swift

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+import Foundation
+import UIKit
+
+public extension CALayer {
+    func addShakeAnimation(amplitude: CGFloat = 3.0, duration: Double = 0.3, count: Int = 4, decay: Bool = false) {
+        let k = Float(UIView.animationDurationFactor())
+        var speed: Float = 1.0
+        if k != 0 && k != 1 {
+            speed = Float(1.0) / k
+        }
+                
+        let animation = CAKeyframeAnimation(keyPath: "position.x")
+        var values: [CGFloat] = []
+        values.append(0.0)
+        for i in 0 ..< count {
+            let sign: CGFloat = (i % 2 == 0) ? 1.0 : -1.0
+            let multiplier = decay ? 1.0 / CGFloat(i + 1) : 1.0
+            values.append(amplitude * sign * multiplier)
+        }
+        values.append(0.0)
+        animation.values = values.map { ($0 as NSNumber) as AnyObject }
+        var keyTimes: [NSNumber] = []
+        for i in 0 ..< values.count {
+            if i == 0 {
+                keyTimes.append(0.0)
+            } else if i == values.count - 1 {
+                keyTimes.append(1.0)
+            } else {
+                keyTimes.append((Double(i) / Double(values.count - 1)) as NSNumber)
+            }
+        }
+        animation.keyTimes = keyTimes
+        animation.speed = speed
+        animation.duration = duration
+        animation.isAdditive = true
+        
+        self.add(animation, forKey: "shake")
+    }
+}