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Merge pull request #20 from dabing1022/master
add ball rotate chase animation
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NVActivityIndicatorView/Animations/NVActivityIndicatorAnimationBallRotateChase.swift
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,57 @@ | ||
| // | ||
| // NVActivityIndicatorAnimationBallRotateChase.swift | ||
| // NVActivityIndicatorViewDemo | ||
| // | ||
| // Created by ChildhoodAndy on 15/12/7. | ||
| // Copyright © 2015年 Nguyen Vinh. All rights reserved. | ||
| // | ||
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| import UIKit | ||
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| class NVActivityIndicatorAnimationBallRotateChase: NVActivityIndicatorAnimationDelegate { | ||
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| func setUpAnimationInLayer(layer: CALayer, size: CGSize, color: UIColor) { | ||
| let circleSize = size.width / 5; | ||
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| // Draw circles | ||
| for var i = 0; i < 5; i++ { | ||
| let factor = Float(i) * 1.0 / 5 | ||
| let circle = NVActivityIndicatorShape.Circle.createLayerWith(size: CGSize(width: circleSize, height: circleSize), color: color) | ||
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| let animation = rotateAnimation(factor, x: layer.bounds.size.width / 2, y: layer.bounds.size.height / 2, size: size) | ||
| circle.addAnimation(animation, forKey: "animation") | ||
| layer.addSublayer(circle) | ||
| } | ||
| } | ||
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| func rotateAnimation(rate: Float, x: CGFloat, y: CGFloat, size: CGSize) -> CAAnimationGroup { | ||
| let duration: CFTimeInterval = 1.5 | ||
| let fromScale = 1 - rate | ||
| let toScale = 0.2 + rate | ||
| let timeFunc = CAMediaTimingFunction(controlPoints: 0.5, 0.15 + rate, 0.25, 1.0) | ||
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| // Scale animation | ||
| let scaleAnimation = CABasicAnimation(keyPath: "transform.scale") | ||
| scaleAnimation.duration = duration | ||
| scaleAnimation.repeatCount = HUGE | ||
| scaleAnimation.fromValue = fromScale | ||
| scaleAnimation.toValue = toScale | ||
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| // Position animation | ||
| let positionAnimation = CAKeyframeAnimation(keyPath: "position") | ||
| positionAnimation.duration = duration | ||
| positionAnimation.repeatCount = HUGE | ||
| positionAnimation.path = UIBezierPath(arcCenter: CGPoint(x: x, y: y), radius: size.width / 2, startAngle: 3 * CGFloat(M_PI) * 0.5, endAngle: 3 * CGFloat(M_PI) * 0.5 + 2 * CGFloat(M_PI), clockwise: true).CGPath | ||
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| // Aniamtion | ||
| let animation = CAAnimationGroup() | ||
| animation.animations = [scaleAnimation, positionAnimation] | ||
| animation.timingFunction = timeFunc | ||
| animation.duration = duration | ||
| animation.repeatCount = HUGE | ||
| animation.removedOnCompletion = false | ||
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| return animation | ||
| } | ||
| } | ||
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|
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