手势识别和自动布局在iOS6的，从中心缩放 [英] Gesture recognizers and auto-layout in iOS6, scaling from the center

问题描述

这手势识别code以下，通常会从中心缩放视图，当自动布局在iOS6的启用不会。该观点似乎从扩展启用自动布局时，它的起源。其他仿射变换（尤其是缩放和旋转）也没有工作，我的预期。

任何人有这个问题，或者可以启发我来处理这个正确的方式？

   - （IBAction为）handlePinch：（UIPinchGestureRecognizer *）{识别
    recognizer.view.transform = CGAffineTransformScale（recognizer.view.transform，recognizer.scale，recognizer.scale）;
    recognizer.scale = 1;
}
 

解决方案

通过自动布局你应该修改你的约束，因为转换和约束可以相互矛盾的......我有同样的问题，的在WWDC这会议上对我帮助很大。看看视频在30:35开始

This gesture recognizer code below, which normally would scale a view from the center, does not when auto-layout is enabled in iOS6. The view seems to scale from it's origin when auto layout is enabled. Other affine transformations (particularly scale and rotate) are also not working as I expected.

Anyone have this issue, or can enlighten me to the right way to handle this?

- (IBAction)handlePinch:(UIPinchGestureRecognizer *)recognizer {    
    recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, recognizer.scale, recognizer.scale);
    recognizer.scale = 1;  
}

解决方案

With Autolayout you should edit your constraints because transforms and constraints can be conflicting... I had the same problem and this session at WWDC helped me a lot. Take a look at the Video beginning at 30:35

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