这是开始使用的基本代码:
[UIView transitionWithView:self.view duration:2.0
options:UIViewAnimationOptionBeginFromCurrentState
animations:^ {
CALayer *layer1 = leftband.layer;
layer1.anchorPoint = CGPointMake(0, 0.5);
CATransform3D rotationAndPerspectiveTransform1 = CATransform3DIdentity;
rotationAndPerspectiveTransform1.m34 = 1.0 / -500;
rotationAndPerspectiveTransform1 = CATransform3DRotate(rotationAndPerspectiveTransform1, DegreesToRadians(-180.0f), 0.0f, 1.0f, 0.0f);
layer1.transform = rotationAndPerspectiveTransform1;
CALayer *layer2 = rightband.layer;
layer2.anchorPoint = CGPointMake(0, 0.5);
CATransform3D rotationAndPerspectiveTransform2 = CATransform3DIdentity;
rotationAndPerspectiveTransform2.m34 = 1.0 / -500;
rotationAndPerspectiveTransform2 = CATransform3DRotate(rotationAndPerspectiveTransform2, DegreesToRadians(180.0f), 0.0f, 1.0f, 0.0f);
layer2.transform = rotationAndPerspectiveTransform2;
}
completion:nil {
}];
leftband 和 rightband 是两个 UIImageView。我想要的效果是leftband沿Y轴向左方向变换动画。右边带沿其 Y 轴向右做同样的事情。
但是上面的代码导致左右图像视图在同一方向上动画(它只发生在左边)。我想我对锚点的理解是错误的。旋转变换中的 -180° 和 +180° 都会产生向左的动画。
我在这里做错了什么?