iPhone UIView以编程方式设置阻止/定位支柱/弹簧 [英] iPhone UIView set resisting/position struts/springs programmatically

问题描述

我有一个接口，它使用.xib和以编程方式添加的视图中的元素。我正在尝试旋转视图。如果我指定左侧和底部的支柱，.xib元素会保持在位，但是以编程方式添加的元素会丢失相对于屏幕底部的位置。

I have an interface which uses elements from both an .xib and programmatically added views. I"m trying to rotate the views. The .xib elements stay in position if I assign left and bottom struts, but the programmatically added elements lose their position relative to the bottom of the screen.

如何以编程方式替换具有底部支柱的UIView的顶部支柱？我知道弹簧可以添加

uiview.autoresizingmask = ...;

推荐答案

autoresizingMask 属性也控制struts。听起来你想要这样做：

The autoresizingMask property also controls "struts". It sounds like you want to do this:

UIViewAutoresizing mask = myView.autoresizingMask;
mask &= ~UIViewAutoresizingFlexibleBottomMargin;
mask |= UIViewAutoresizingFlexibleTopMargin;
myView.autoresizingMask = mask;

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