自动布局与UINavigationBar的和的UIBarButtonItem [英] Auto Layout with UINavigationBar and UIBarButtonItem

问题描述

我喜欢创造自己的看法作为独立的厦门国际银行文件，然后实例化并添加为子视图。

I like to create my views as standalone Xib files then instantiate them and add as subviews.

所以，用时一个 UINavigationBar的，我希望能够做同样的事情，首先要创建我的自定义视图 - 从厦门国际银行 - 然后将其添加为自定义视图的的UIBarButtonItem ：

So, when working with a UINavigationBar, I expected to be able to do the same thing, first creating my custom view - from the Xib - then adding it as a custom view to the UIBarButtonItem:

UIBarButtonItem *anItem = [[UIBarButtonItem alloc] initWithCustomView:_myCustomView];

然后增加了导航栏：

Then adding to the nav bar:

self.navigationBar.topItem.rightBarButtonItems = @[ anItem, anotherItem ];

到目前为止好。

So far so good.

现在， _myCustomView 使用自动布局（AL），我认为这将是没有问题的。的不是这样的。的我试过，一应俱全。没有奏效。我甚至尝试添加自定义视图具有导航栏控制器的一个子视图。认为作为视图层次兄弟姐妹，AL将会把它当作外常规视图的 UINavigationBar的。

Now, _myCustomView uses Auto Layout (AL) and I thought this would be no problem. Not the case. I've tried just about everything. Nothing has worked. I even tried adding the custom view as a subview of the controller that has the navigation bar. Thinking that as siblings in the view hierarchy, AL would treat it as a regular view outside the UINavigationBar.

这也不能工作。控制器的 updateViewConstraints 叫，但从来没有使用。视图的初始帧住在 CGRectZero 。这是因为如果AL看到该视图是在顶部的 UINavigationBar的，即使是兄弟姐妹，并决定它不需要铺设了。

That didn't work either. The controller's updateViewConstraints was called but never applied. The view's initial frame stayed at CGRectZero. It's as if AL sees that the view is on top of a UINavigationBar, even as a sibling, and decides it doesn't need laying out.

当然，我试过 bringSubviewToFront ， translatesAutoresizingMaskIntoConstraintstranslatesAutoresizingMaskIntoConstraints ，等等。后者给了可爱的：

Of course, I've tried bringSubviewToFront, translatesAutoresizingMaskIntoConstraintstranslatesAutoresizingMaskIntoConstraints, and so on. The latter gave the lovely:

终止应用程序由于未捕获的异常
  NSInternalInconsistencyException，理由是：自动布局仍
  执行-layoutSubviews后需要。 MyNavigationBar的
  实施-layoutSubviews的需要调用超。

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews. MyNavigationBar's implementation of -layoutSubviews needs to call super.'

所以，问题是，有没有人从厦门国际银行加载自定义视图与AL，并成功地将此作为 customView 在的UIBarButtonItem ？如果是这样，怎么样？

So, the question is, has anyone loaded a custom view with AL from a Xib, and successfully set this as a customView on a UIBarButtonItem? If so, how?

推荐答案

看起来像的副本iOS的自动布局和UIToolbar / UIBarButtonItems

UIBarButtonItems 不会从的UIView 继承，因此，使用它们内部基于自动布局自定义视图可能无法完全支持的。听起来像是你需要做的pre自动布局的事情，直到问题得到解决。我建议提交的bug。

UIBarButtonItems do not inherit from UIView, so using auto-layout based custom views within them might not be fully supported. Sounds like you have to do the pre auto layout thing until the issue is resolved. I would suggest filing a bug.

编辑：由pre自动布局的事情，我的意思是直接操纵你的视图帧

By the pre auto layout thing, I mean manipulating the frame of your views directly.

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