我有一个圆形的CAShapeLayer，我想为其填充动画。我已经将我的CAShapeLayer创建为-(void)viewDidLoad{[superviewDidLoad];//FilledlayerCAShapeLayer*filledCircleShape=[CAShapeLayernew];filledCircleShape.frame=CGRectMake(100,100,100,100);filledCircleShape.fillColor=[UIColorpurpleColor].CGColor;filledCircleShape.strokeColor=[UIColo