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79 lines
3.3 KiB
79 lines
3.3 KiB
1 year ago
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// NVActivityIndicatorAnimationBallRotateChase.swift
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// NVActivityIndicatorView
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//
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// The MIT License (MIT)
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// Copyright (c) 2016 Vinh Nguyen
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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#if canImport(UIKit)
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import UIKit
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class NVActivityIndicatorAnimationBallRotateChase: NVActivityIndicatorAnimationDelegate {
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func setUpAnimation(in layer: CALayer, size: CGSize, color: UIColor) {
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let circleSize = size.width / 5
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// Draw circles
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for i in 0 ..< 5 {
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let factor = Float(i) * 1 / 5
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let circle = NVActivityIndicatorShape.circle.layerWith(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: CGSize(width: size.width - circleSize, height: size.height - circleSize))
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circle.frame = CGRect(x: 0, y: 0, width: circleSize, height: circleSize)
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circle.add(animation, forKey: "animation")
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layer.addSublayer(circle)
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}
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}
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func rotateAnimation(_ rate: Float, x: CGFloat, y: CGFloat, size: CGSize) -> CAAnimationGroup {
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let duration: CFTimeInterval = 1.5
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let fromScale = 1 - rate
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let toScale = 0.2 + rate
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let timeFunc = CAMediaTimingFunction(controlPoints: 0.5, 0.15 + rate, 0.25, 1)
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// Scale animation
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let scaleAnimation = CABasicAnimation(keyPath: "transform.scale")
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scaleAnimation.duration = duration
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scaleAnimation.repeatCount = HUGE
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scaleAnimation.fromValue = fromScale
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scaleAnimation.toValue = toScale
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// Position animation
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let positionAnimation = CAKeyframeAnimation(keyPath: "position")
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positionAnimation.duration = duration
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positionAnimation.repeatCount = HUGE
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positionAnimation.path = UIBezierPath(arcCenter: CGPoint(x: x, y: y), radius: size.width / 2, startAngle: CGFloat(3 * Double.pi * 0.5), endAngle: CGFloat(3 * Double.pi * 0.5 + 2 * Double.pi), clockwise: true).cgPath
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// Aniamtion
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let animation = CAAnimationGroup()
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animation.animations = [scaleAnimation, positionAnimation]
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animation.timingFunction = timeFunc
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animation.duration = duration
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animation.repeatCount = HUGE
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animation.isRemovedOnCompletion = false
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return animation
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}
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}
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#endif
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