简易动画：
iview.animationImages = {
var images: [UIImage] = []
for i in 0...40 {
if let image = UIImage(named: "") {
images.append(image)
}
}
return images
} ()
animationImageView.animationDuration = 0.5;//设置动画时间
animationImageView.animationRepeatCount = 0;//设置动画次数 0 表示无限
[animationImageView startAnimating];//开始播放动画
该方法只有stop没有暂停功能，不适用于多个image；
多image实现方式：
let myAnimatedTimer = NSTimer.scheduledTimerWithTimeInterval(0.04, target: self, selector: "setNextImage", userInfo: nil, repeats: true)
func setNextImage() {
iview.image = UIImage(named: "image\(nextImage).png")
}
简易放大缩小动画：
targetAnimation = CABasicAnimation(keyPath: "transform.scale") targetAnimation?.duration = 1.0 targetAnimation?.repeatCount = Float.infinity //不停重复 targetAnimation?.autoreverses = true targetAnimation?.fromValue = NSNumber(float: 1.0) targetAnimation?.toValue = NSNumber(float: 1.2) targetL?.layer.addAnimation(targetAnimation!, forKey: "scale-layer")
//暂停layer上的动画 func pauseLayer(layer: CALayer) { //Absolute Time(绝对时间)的概念,可以通过CACurrentMediaTime()获得 let pausedTime = layer.convertTime(CACurrentMediaTime(), fromLayer: nil) //图层当前的时间 layer.speed = 0.0 //当前对象的时间流相对于父级对象时间流的流逝速度 //timeOffset则是active local time的偏移量.将一个动画看作一个环,timeOffset改变的其实是动画在环内的起点 layer.timeOffset = pausedTime } //继续layer上的动画 func resumeLayer(layer: CALayer) { let pausedTime = layer.timeOffset layer.speed = 1.0 layer.timeOffset = 0.0 layer.beginTime = 0.0 let timeSincePause = layer.convertTime(CACurrentMediaTime(), fromLayer: nil) - pausedTime layer.beginTime = timeSincePause }
截取scrollView上的区域
static func captureScrollView(scrollV: UIScrollView, atFrame: CGRect? = nil) -> UIImage{ var shareImg = UIImage() let savedFrame = scrollV.frame scrollV.frame.size.height = atFrame?.height ?? 0 UIGraphicsBeginImageContextWithOptions(scrollV.frame.size, false, UIScreen.mainScreen().scale) scrollV.setContentOffset(CGPointZero, animated: false) let context: CGContextRef = UIGraphicsGetCurrentContext()! let savedContentOffset = scrollV.contentOffset if atFrame != nil { CGContextSaveGState(context) UIRectClip(atFrame!) } scrollV.layer.renderInContext(context) //将当前layer的呈现拷贝到context上 let img = UIGraphicsGetImageFromCurrentImageContext() if img != nil { shareImg = img } scrollV.setContentOffset(savedContentOffset, animated: false) scrollV.frame = savedFrame UIGraphicsEndImageContext() return shareImg }
环形进度条：
class HoopVateView: UIView { struct Constant { //进度条宽度 static let lineWidth: CGFloat = 6 //进度条颜色 static let progressColoar = HistoryTool.HistoryBottomLightColor } //进度条 let progressLayer = CAShapeLayer() //进度条路径（整个圆圈） let path = UIBezierPath() //当前进度 @IBInspectable var progress: Double = 0 { didSet { if progress > 100 { progress = 100 }else if progress < 0 { progress = 0 } } } required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) } override init(frame: CGRect) { super.init(frame: frame) self.backgroundColor = CC.transparent } //进度槽 let trackLayer = CAShapeLayer() override func drawRect(rect: CGRect) { //获取整个进度条圆圈路径 path.addArcWithCenter(CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds)), radius: bounds.size.width/2 - Constant.lineWidth / 2, startAngle: angleToRadian(-90), endAngle: angleToRadian(270), clockwise: true) //绘制进度条 progressLayer.frame = bounds progressLayer.fillColor = UIColor.clearColor().CGColor progressLayer.strokeColor = Constant.progressColoar.CGColor progressLayer.lineWidth = Constant.lineWidth
progressLayer.lineCap = kCALineCapRound; //起点样式 progressLayer.lineJoin = kCALineJoinRound; //终点样式 progressLayer.path = path.CGPath progressLayer.strokeStart = 0 print(progress) progressLayer.strokeEnd = CGFloat(progress) layer.addSublayer(progressLayer) } //设置进度（可以设置是否播放动画） func setProgress(pro: Double,animated anim: Bool) {// setProgress(pro, animated: anim, withDuration: 0.55) progress = pro progressLayer.strokeEnd = CGFloat(progress)/100.0 }}
转载于:https://www.cnblogs.com/hazhede/p/5775739.html
