Ios 在Swift中设置循环进度视图的动画
我想用下面的代码为我的圆形progressView制作一个动画。我希望动画开始从0到我想要的值的进度。 但我永远也找不到动画作品Ios 在Swift中设置循环进度视图的动画,ios,swift,animation,progress,Ios,Swift,Animation,Progress,我想用下面的代码为我的圆形progressView制作一个动画。我希望动画开始从0到我想要的值的进度。 但我永远也找不到动画作品 func Popular(){ let circle = Pop;//Pop is a UIView circle.bounds = CGRect(x: 0,y: 0, width: 100, height: 100); circle.frame = CGRectMake(0,0, 100, 100); circle.layoutIfNeeded() var p
func Popular(){
let circle = Pop;//Pop is a UIView
circle.bounds = CGRect(x: 0,y: 0, width: 100, height: 100);
circle.frame = CGRectMake(0,0, 100, 100);
circle.layoutIfNeeded()
var progressCircle = CAShapeLayer();
let centerPoint = CGPoint (x: circle.bounds.width / 2, y: circle.bounds.width / 2);
let circleRadius : CGFloat = circle.bounds.width / 2 * 0.83;
let circlePath = UIBezierPath(arcCenter: centerPoint, radius: circleRadius, startAngle: CGFloat(-0.5 * M_PI), endAngle: CGFloat(1.5 * M_PI), clockwise: true );
progressCircle = CAShapeLayer ();
progressCircle.path = circlePath.CGPath;
progressCircle.strokeColor = UIColor.greenColor().CGColor;
progressCircle.fillColor = UIColor.clearColor().CGColor;
UIView.animateWithDuration(3.0,
delay: 1.0,
options: [],
animations: {
progressCircle.lineWidth = 5.0;
progressCircle.strokeStart = 0;
progressCircle.strokeEnd = 0.20;
circle.layer.addSublayer(progressCircle);
circle
progressCircle.strokeEnd = 0.2;
},
completion: { finished in
print("Picutre done")
})
}
有两件事-
首先-不要重新初始化progressCircle
。您正在调用progressCircle=CAShapeLayer()代码>两次。但这不是bug
第二步-在开始设置动画之前添加子层。移动circle.layer.addSublayer(progressCircle)代码>动画块外部。使用CABasicAnimation
let circle = Pop
var progressCircle = CAShapeLayer()
let circlePath = UIBezierPath(ovalInRect: circle.bounds)
progressCircle = CAShapeLayer ()
progressCircle.path = circlePath.CGPath
progressCircle.strokeColor = UIColor.greenColor().CGColor
progressCircle.fillColor = UIColor.clearColor().CGColor
progressCircle.lineWidth = 5.0
circle.layer.addSublayer(progressCircle)
let animation = CABasicAnimation(keyPath: "strokeEnd")
animation.fromValue = 0
animation.toValue = 0.2
animation.duration = 3
animation.fillMode = kCAFillModeForwards
animation.removedOnCompletion = false
progressCircle.addAnimation(animation, forKey: "ani")
您是否收到任何错误消息?运行此操作时会发生什么?完全没有错误消息…谢谢。我根据你的建议更改了代码,唯一的动画是progressCircle突然出现。我已经将代码放入ViewDidAppear.YesCABasicAnimation
是制作子层动画的正确方法。我还有一个问题,就是圆的大小总是比视图大。如何调整它?让circlePath=UIBezierPath(ovalInRect:CGRectInset(circle.bounds,5/2.0,5/2.0))