LoaderBallMultipleRotateAnimation.swift
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//
// LoaderBallClipRotateMultipleAnimation.swift
// LoaderButton
//
// Created by 黄进文 on 2018/6/12.
// Copyright © 2018年 Jovins. All rights reserved.
//
import UIKit
class LoaderBallMultipleRotateAnimation: LoaderButtonAnimationDelegate {
/// Setup Loader Layer
///
/// - Parameters:
/// - layer: layer Parent layer (Button layer)
/// - frame: frame of parant layer
/// - color: color of Loader
func setupLoaderButtonAnimation(layer: CALayer, frame: CGRect, color: UIColor) {
let padding: CGFloat = 10.0
let kWidth: CGFloat = min(frame.width, frame.height)
let sizeValue = max(kWidth - padding, 1.0)
let bigFrame: CGRect = CGRect(x: padding * 0.5, y: padding * 0.5,
width: sizeValue, height: sizeValue)
let smallFrame: CGRect = CGRect(x: (kWidth - sizeValue * 0.5) * 0.5,
y: (kWidth - sizeValue * 0.5) * 0.5,
width: sizeValue * 0.5, height: sizeValue * 0.5)
let timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
let duration: CFTimeInterval = 1.0
createCircle(with: .ringHorizontal, duration: duration, timingFunction: timingFunction, layer: layer, size: bigFrame.size, frame: bigFrame, color: color, reverse: false)
createCircle(with: .ringVertical, duration: duration, timingFunction: timingFunction, layer: layer, size: smallFrame.size, frame: smallFrame, color: color, reverse: true)
}
private func createCircle(with shape: LoaderShape, duration: CFTimeInterval, timingFunction: CAMediaTimingFunction, layer: CALayer, size: CGSize, frame: CGRect, color: UIColor, reverse: Bool) {
let circle = shape.layer(with: size, color: color)
let animation = createAnimation(with: duration, timingFunction: timingFunction, reverse: reverse)
circle.frame = frame
circle.add(animation, forKey: "animation")
layer.addSublayer(circle)
}
private func createAnimation(with duration: CFTimeInterval, timingFunction: CAMediaTimingFunction, reverse: Bool) -> CAAnimation {
/// Scale Animation
let scaleAnimation = CAKeyframeAnimation(keyPath: "transform.scale")
scaleAnimation.keyTimes = [0, 0.5, 1]
scaleAnimation.timingFunctions = [timingFunction, timingFunction]
scaleAnimation.values = [1, 0.6, 1]
scaleAnimation.duration = duration
/// Rotate Animation
let rotateAnimation = CAKeyframeAnimation(keyPath: "transform.rotation.z")
rotateAnimation.keyTimes = scaleAnimation.keyTimes
rotateAnimation.timingFunctions = [timingFunction, timingFunction]
if !reverse {
rotateAnimation.values = [0, Double.pi, 2 * Double.pi]
} else {
rotateAnimation.values = [0, -Double.pi,-2 * Double.pi]
}
rotateAnimation.duration = duration
/// Group Animation
let animation = CAAnimationGroup()
animation.animations = [scaleAnimation, rotateAnimation]
animation.duration = duration
animation.repeatCount = HUGE
animation.isRemovedOnCompletion = false
return animation
}
}