我正在尝试将CALayer用于动画。我想要的是收缩和反弹(有效)的圆圈以及用于展开和淡出like this的描边圆圈。不幸的是,subLayer上的第二个环没有动画。我不知道为什么。
我像我这样设置我的图层
- (void)setLayerProperties {
//The view’s Core Animation layer used for rendering.
CAShapeLayer *layer = (CAShapeLayer *)self.layer;
UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)
byRoundingCorners:UIRectCornerAllCorners
cornerRadii:self.frame.size];
layer.path = bezierPath.CGPath;
layer.fillColor = _Color.CGColor;
rippleLayer = [[CAShapeLayer alloc] init]; // update from Andrea's answer
layer.path = bezierPath.CGPath;
layer.strokeColor = [UIColor blueColor].CGColor;
[layer addSublayer:rippleLayer];
}
然后我使用这些函数设置动画
- (void)pop{
CABasicAnimation *animation = [self animationWithKeyPath:@"transform.scale"];
[animation setFromValue:[NSNumber numberWithFloat:1.0f]];
[animation setToValue:[NSNumber numberWithFloat:0.8f]];
[animation setRemovedOnCompletion:YES];
[animation setDuration:0.15];
[animation setAutoreverses:YES];
[self.layer addAnimation:animation forKey:animation.keyPath];
rippleLayer.anchorPoint = CGPointMake(1, 1);
CABasicAnimation *scale = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
[scale setFromValue:[NSNumber numberWithFloat:1.0f]];
[scale setToValue:[NSNumber numberWithFloat:2.0f]];
[scale setRepeatCount:1];
[scale setDuration:1.0f];
//r[scale setRemovedOnCompletion:YES];
[scale setFillMode:kCAFillModeForwards];
[rippleLayer addAnimation:scale forKey:scale.keyPath];
}
答案 0 :(得分:2)
您似乎正在将rippleLayer创建为普通的CALayer,而不是CAShapeLayer。就我记忆而言,path不是CALayer的属性,并且您将获得与之前相同的层的路径。所以你要添加一个完全没有内容的简单图层。