How to animate CAShapeLayer path and fillColor

问题

How to animate CAShapeLayer path and fillColor?

How to animate strokeEnd to show the path being drawn? and how to animate fillColor?

回答1:

To animate path

  //setup the CAShapeLayer
myShapeLayer.strokeColor = [[UIColor blueColor] CGColor];
myShapeLayer.lineWidth = 5;
myShapeLayer.fillColor = [[UIColor yellowColor] CGColor];



//Display it!
[self.view.layer addSublayer:myShapeLayer];

//Animate path
CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
pathAnimation.duration = 1.5f;
pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
pathAnimation.toValue = [NSNumber numberWithFloat:1.0f];
pathAnimation.repeatCount = 10;
pathAnimation.autoreverses = YES;
[myShapeLayer addAnimation:pathAnimation forKey:@"strokeEnd"];

//Animate colorFill
CABasicAnimation *fillColorAnimation = [CABasicAnimation animationWithKeyPath:@"fillColor"];
fillColorAnimation.duration = 1.5f;
fillColorAnimation.fromValue = (id)[[UIColor clearColor] CGColor];
fillColorAnimation.toValue = (id)[[UIColor yellowColor] CGColor];
fillColorAnimation.repeatCount = 10;
fillColorAnimation.autoreverses = YES;
[myShapeLayer addAnimation:fillColorAnimation forKey:@"fillColor"];

I hope this helps :)

来源：https://stackoverflow.com/questions/15651717/how-to-animate-cashapelayer-path-and-fillcolor