使用UISegmentedControl的导航控制器中的自动布局：在iOS7中很好，在iOS6中很糟糕(Auto Layout in Navigation Controller with UISegmentedControl: good in iOS7, bad in iOS6)

 对于导航控制器，我喜欢在从顶部到底部的视图中放置一些控件。 我正在使用自动布局和添加约束，以便视图彼此之间存在垂直间隙。 对于普通视图控制器中的iOS7和iOS6，这在导航控制器中也适用于iOS7; 但在iOS6中出错了。 UISegmentedControl显示错误。 查看截图。 
 
 看起来iOS6视图中没有考虑UISegmentedControl的较大高度。 当从3.5英寸屏幕切换到4英寸屏幕时，它也会移位。 
 
 请注意，这仅发生在导航控制器视图中。 在导航控制器的故事板中，我将Top Bar设置为“Opaque Navigation Bar”。 上部按钮具有约束“顶部空间到顶部布局指南”。 所有其他控件都有一个约束“Top Space to ....”（控制在它们上面）。 
 
 我可以申请任何已知的修复程序吗？ 
 
 可能有什么不对？ （我是汽车布局的新手。）或者它只是一个我必须以某种方式解决的错误？ 
 
 
 编辑： 
 
 我尝试将分段控件放在一个额外的视图中，但这也无济于事。 
 
 我可以为分段控件设置高度约束，这在某种程度上有所帮助。 但是对于分段控件，这为iOS6和iOS7设置了相同的高度。 我现在的工作是在视图加载时更改/添加代码中的高度约束，并根据iOS版本设置值。 还有其他建议吗？ 
 
 
 截图： 
 
 在Navigation Controller中，iOS6视图： 
 
 
 在Navigation Controller中，iOS7视图： 
 
 
 
 在“普通”视图控制器中，iOS6视图： 
 
 
 在“普通”视图控制器中，iOS7视图： 
 

For a navigation controller I like to have a few controls placed in a view from top towards the bottom. I am using auto layout and added constraints, so that the views have a vertical gap to each other. This looks nice for iOS7 and iOS6 in a normal view controller, also for iOS7 in a navigation controller; but wrong in iOS6. The UISegmentedControl shows up wrong. See the screenshots.
 
It looks like the larger height of the UISegmentedControl is not taken into account for iOS6 view. Also it gets shifted out of place when switching from 3.5 inch to 4 inch screen.
 
Note that this only occurs in a navigation controller view. In the storyboard for the navigation controller I set Top Bar to "Opaque Navigation Bar". The upper button has a constraint "Top Space to Top Layout Guide". All other controls have a constraint "Top Space to ...." (control above them).
 
Are there any known fixes which I could apply?
 
What could be wrong? (I'm quite a newbie for auto layout.) Or is it just a bug which I have to work around somehow?
 
 
EDIT: 
 
I tried placing the segmented control in an extra view, but that did not help either. 
 
I could set a height constraint to the segmented control and that did help in a way. But this sets the same height to both iOS6 and iOS7 for the segmented control. My work around would now be to change/add the height constraint in code when the view loads and set a value depending on the iOS version. Are there other recommendations?
 
 
The screenshots:
 
In Navigation Controller, iOS6 view:
 
 
In Navigation Controller, iOS7 view:
 
 
 
In a "normal" view controller, iOS6 view:
 
 
In a "normal" view controller, iOS7 view:
 

原文：