// // Created by Tom Baranes on 23/08/16. // Copyright (c) 2016 IBAnimatable. All rights reserved. // import UIKit public class ActivityIndicatorAnimationBallScale: ActivityIndicatorAnimating { // MARK: Properties fileprivate let duration: CFTimeInterval = 1 // MARK: ActivityIndicatorAnimating public func configureAnimation(in layer: CALayer, size: CGSize, color: UIColor) { let circle = ActivityIndicatorShape.circle.makeLayer(size: size, color: color) circle.frame = CGRect(x: (layer.bounds.size.width - size.width) / 2, y: (layer.bounds.size.height - size.height) / 2, width: size.width, height: size.height) circle.add(animation, forKey: "animation") layer.addSublayer(circle) } } // MARK: - Setup private extension ActivityIndicatorAnimationBallScale { var animation: CAAnimationGroup { let animation = CAAnimationGroup() animation.animations = [scaleAnimation, opacityAnimation] animation.timingFunctionType = .easeInOut animation.duration = duration animation.repeatCount = .infinity animation.isRemovedOnCompletion = false return animation } var scaleAnimation: CABasicAnimation { let scaleAnimation = CABasicAnimation(keyPath: .scale) scaleAnimation.duration = duration scaleAnimation.fromValue = 0 scaleAnimation.toValue = 1 return scaleAnimation } var opacityAnimation: CABasicAnimation { let opacityAnimation = CABasicAnimation(keyPath: .opacity) opacityAnimation.duration = duration opacityAnimation.fromValue = 1 opacityAnimation.toValue = 0 return opacityAnimation } }