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//
// LoaderBallClipRotatePulseAnimation.swift
// LoaderButton
//
// Created by 黄进文 on 2018/6/12.
// Copyright © 2018年 Jovins. All rights reserved.
//
import UIKit
class LoaderBallPulseRotateAnimation: 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 sizeValue = max(min(frame.width, frame.height) - padding, 1.0)
let duration: CFTimeInterval = 1.0
let timingFunction = CAMediaTimingFunction(controlPoints: 0.09, 0.57, 0.49, 0.9)
smallCircle(with: duration, timingFunction: timingFunction, layer: layer, sizeValue: sizeValue, color: color)
bigCircle(with: duration, timingFunction: timingFunction, layer: layer, sizeValue: sizeValue, color: color)
}
/// Small Circle
private func smallCircle(with duration: CFTimeInterval, timingFunction: CAMediaTimingFunction, layer: CALayer, sizeValue: CGFloat, color: UIColor) {
let animation = CAKeyframeAnimation(keyPath: "transform.scale")
animation.keyTimes = [0, 0.3, 1]
animation.timingFunctions = [timingFunction, timingFunction]
animation.values = [1, 0.3, 1]
animation.duration = duration
animation.repeatCount = HUGE
animation.isRemovedOnCompletion = false
// Draw Circle
let circleSize = sizeValue * 0.5
let padding: CGFloat = 10.0
let circle = LoaderShape.circle.layer(with: CGSize(width: circleSize, height: circleSize), color: color)
let frame = CGRect(x: (sizeValue + padding - circleSize) * 0.5,
y: (sizeValue + padding - circleSize) * 0.5,
width: circleSize, height: circleSize)
circle.frame = frame
circle.add(animation, forKey: "animation")
layer.addSublayer(circle)
}
/// Big Circle
private func bigCircle(with duration: CFTimeInterval, timingFunction: CAMediaTimingFunction, layer: CALayer, sizeValue: CGFloat, color: UIColor) {
/// 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]
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
/// Draw Circle
let padding: CGFloat = 10.0
let circle = LoaderShape.ringVertical.layer(with: CGSize(width: sizeValue, height: sizeValue), color: color)
let frame = CGRect(x: padding * 0.5,
y: padding * 0.5,
width: sizeValue,
height: sizeValue)
circle.frame = frame
circle.add(animation, forKey: "animation")
layer.addSublayer(circle)
}
}
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