1、添加粒子效果
[objc] view plain copy
func addPteEffect(view:UIView, point : CGPoint) {
// 1.创建发射器
let emitter = CAEmitterLayer()
// 2.发射器位置
emitter.emitterPosition = point
// 3.开启三维效果
emitter.preservesDepth = true
var cells = [CAEmitterCell]()
for i in 0..<10 {
// 4.设置 Cell(对应其中一个粒子)
// 4.0.创建粒子
let cell = CAEmitterCell()
// 4.1.每秒发射粒子数
cell.birthRate = Float(arc4random_uniform(4)) + 3
// 4.2.粒子存活时间
cell.lifetime = 5
cell.lifetimeRange = 2.5
// 4.3.缩放比例
cell.scale = 0.7
cell.scaleRange = 0.3
// 4.4.粒子发射方向
cell.emissionLongitude = CGFloat(-(Double.pi / 2))
cell.emissionRange = CGFloat((Double.pi / 4) * 0.6)
// 4.5.粒子速度
cell.velocity = 100
cell.velocityRange = 50
// 4.6.旋转速度
cell.spin = CGFloat(Double.pi / 2)
// 4.7.粒子内容
cell.contents = UIImage(named: "good\(i)_30x30")?.cgImage
cells.append(cell)
}
// 5.将粒子添加到发射器中
emitter.emitterCells = cells
view.layer.addSublayer(emitter)
}
2、删除粒子效果
[objc] view plain copy
func removePteEffect(view:UIView) {
view.layer.sublayers?.filter({ $0.isKind(of: CAEmitterLayer.self)}).last?.removeFromSuperlayer()
}
