如何解决IOS 动画中 Autolayout 与View Transforms的冲突

IOS 的动画放大与缩小，并非按照找它的中心点放大和缩小，而是左上角 。我分析了下原来是Autolayout 与View Transforms的冲突造成的。

 

- (void) addSubviewWithZoomInAnimation:(UIView*)view duration:(float)secs option:(UIViewAnimationOptions)option

{

// first reduce the view to 1/100th of its original dimension

CGAffineTransform trans = CGAffineTransformScale(view.transform, 0.01, 0.01);

view.transform = trans;    // do it instantly, no animation

[self addSubview:view];

// now return the view to normal dimension, animating this tranformation

[UIView animateWithDuration:secs delay:0.0 options:option

animations:^{

view.transform = CGAffineTransformScale(view.transform, 100.0, 100.0);

}

completion:nil];    

}



- (void) removeWithZoomOutAnimation:(float)secs option:(UIViewAnimationOptions)option

{

[UIView animateWithDuration:secs delay:0.0 options:option

animations:^{

self.transform = CGAffineTransformScale(self.transform, 0.01, 0.01);

}

completion:^(BOOL finished) { 

[self removeFromSuperview]; 

}];

}

 

 

解决方案： 

Disable auto layout:

self.imageView.translatesAutoresizingMaskIntoConstraints = YES;

 

【1】

http://stackoverflow.com/questions/12943107/how-do-i-adjust-the-anchor-point-of-a-calayer-when-auto-layout-is-being-used/14105757#14105757