我有一个关于将多个转换应用于 UIView 的问题。例如,当我围绕它的中心点对 UIView 的旋转进行动画处理时,然后尝试围绕位于其边界之外的点旋转它,第二个动画全部搞砸了,例如它完全抖动或旋转不同于指定的方式。如何使第一个动画不影响第二个动画,但在播放第二个动画时仍然存在?
编辑:这是代码。首先,我围绕它的中心点旋转视图:
CALayer *layer = view.layer;
CATransform3D aTransform = CATransform3DIdentity;
CGFloat zDistance = 2000;
aTransform.m34 = 1.0 / -zDistance;
scrollView.layer.sublayerTransform = aTransform;
CGFloat subviewX = 0.5;
CGFloat subviewY = 0.5;
[self setAnchorPoint:CGPointMake(subviewX, subviewY) forView:view];
CATransform3D bTransform = CATransform3DIdentity;
CABasicAnimation *rotateAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
rotateAnim.fromValue= [NSValue valueWithCATransform3D:bTransform];
bTransform = CATransform3DRotate(aTransform,-20*M_PI/180, 1, 1, 0);
rotateAnim.duration=0.05;
rotateAnim.toValue=[NSValue valueWithCATransform3D:bTransform];
layer.transform = bTransform;
[layer addAnimation:rotateAnim forKey:nil];
现在图层已旋转,我想将其围绕左屏幕边框翻转:
CALayer *layer = view.layer;
CATransform3D aTransform = CATransform3DIdentity;
CGFloat zDistance = 2000;
aTransform.m34 = 1.0 / -zDistance;
tileScrollView.layer.sublayerTransform = aTransform;
CGFloat subviewX = ((1/view.frame.size.width)*(view.frame.origin.x));
CGFloat subviewY = 0.5;
[self setAnchorPoint:CGPointMake(-subviewX, subviewY) forView:view];
CATransform3D bTransform = layer.transform;
CABasicAnimation *rotateAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
rotateAnim.fromValue= [NSValue valueWithCATransform3D:bTransform];
bTransform = CATransform3DMakeRotation(-M_PI_2, 0, 1, 0);
rotateAnim.duration=0.2;
rotateAnim.toValue=[NSValue valueWithCATransform3D:bTransform];
layer.transform = bTransform;
[layer addAnimation:rotateAnim forKey:nil];
因为我想要翻转旋转的图层,所以我把CATransform3D bTransform = layer.transform
而不是放在CATransform3D bTransform = CATransform3DIdentity
第二个动画的开头,但同样,这只会使动画混乱
另一个类似的问题是我有一个包含 9 个子视图的 UIView,其中一个每秒围绕它的中心点翻转。但是每次我对这 9 个 UIView 的 superView 应用转换时,子视图的布局就会变得混乱。有谁知道如何防止这种情况?任何帮助将不胜感激。提前致谢!