UIView不自动调整子视图 [英] UIView not autoresizing subview

问题描述

我有一个UIView a 已启用自动调整子视图。它的大小是：

I have a UIView a that has autoresizing subviews enabled. It's size is:

 <UIView: 0x7650180; frame = (0 0; 320 394); clipsToBounds = YES; autoresize = LM+RM+H; layer = <CALayer: 0x7650230>>

我有另一个UIView b 到视图 a 。视图 b 具有灵活的宽度/高度。当我添加它，我期望它的高度更改为 394 ，但它保持与nib中的相同（ 420 ）：

I have another UIView b which i added to the view a. View b has flexible width/height. When I add it in, I expect it's height to change to 394, but it remains the same as the in the nib (420):

<UIView: 0x764f720; frame = (0 0; 320 460); autoresize = LM+W+RM+TM+H+BM; layer = <CALayer: 0x764f320>>

我做错了什么？

感谢

推荐答案

自动调整子视图的大小只适用于已添加到父视图的子视图。您应该怎么做：

Autoresizing of subviews works only for subviews already added to a parent view. What should you do:

1. 创建父视图。


2. 添加子视图。
   
3. 为他们设置自动调整掩码。


4. 调整父视图的大小。

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Only then you will see that subviews are being autoresizes.

调整大小后添加子视图不会产生任何效果。

Adding subviews after resize will give no effect.

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