image
1轩褐、生成一個(gè)紅包layer
//創(chuàng)建畫布
let redPLayer = CALayer()
redPLayer.bounds = CGRectMake(0, 0, 35, 46);
redPLayer.anchorPoint = CGPointMake(0, 0)
redPLayer.position = CGPointMake(0, -46)
redPLayer.contents = UIImage(named: hbArr[Int(arc4random()%3)])!.CGImage
self.bgView.layer.addSublayer(redPLayer)
2、添加layer的動(dòng)畫
//畫布動(dòng)畫
//此處keyPath為CALayer的屬性
let moveAnimation:CAKeyframeAnimation = CAKeyframeAnimation(keyPath:"position")
//動(dòng)畫路線，一個(gè)數(shù)組里有多個(gè)軌跡點(diǎn)
let screenW = UInt32(CGRectGetWidth(UIScreen.mainScreen().bounds))
let screenH = CGRectGetHeight(UIScreen.mainScreen().bounds)
moveAnimation.values = [NSValue(CGPoint: CGPointMake(CGFloat(Float(arc4random_uniform(screenW))), 0)),NSValue(CGPoint: CGPointMake(CGFloat(Float(arc4random_uniform(screenW))), screenH))]
//動(dòng)畫間隔
moveAnimation.duration = 5
//重復(fù)次數(shù)
moveAnimation.repeatCount = 1
//動(dòng)畫的速度
moveAnimation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
redPLayer.addAnimation(moveAnimation, forKey: "move")
3鹰服、定時(shí)生成紅包
public func start() {
self.timer?.invalidate()
self.timer = nil
self.timer = NSTimer.scheduledTimerWithTimeInterval(0.5, target: self, selector: #selector(self.showRain), userInfo: "", repeats: true)
}
4、判斷紅包點(diǎn)擊事件
@objc private func clickRedPacket(tapgesture:UITapGestureRecognizer) -> Void {
let touchPoint = tapgesture.locationInView(self.bgView)
if let sublayers = self.bgView.layer.sublayers {
for e in sublayers.enumerate() {
if (e.element.presentationLayer()?.hitTest(touchPoint) != nil) {
print("點(diǎn)中了第\(e.index)個(gè)元素")
let num = randomNums[Int(arc4random()%3)]
if e.index != 0 && e.index % num == 0 {//不等于0切能被整除
self.stop()
if delegate != nil {
delegate?.clickRedPacket(e.index)
}
}
break
}
}
}
}
5、停止紅包雨
public func stop() {
self.timer?.invalidate()
//刪除當(dāng)前紅包layers
if let sublayers = self.bgView.layer.sublayers {
for item in sublayers {
item.removeAllAnimations()
item.removeFromSuperlayer()
}
}
self.dismiss()
}
