隐藏导航控制器的rightBarButtonItem [英] Hide the rightBarButtonItem of a navigation controller
问题描述
有谁知道如何隐藏 UINavigationController 的 rightBarButtonItem ？在我的应用程序中，我有一个编辑按钮，作为 UINavigationController 的 rightBarButtonItem 。我想隐瞒这个？完成某些操作后的UIBarButton`。
Does anyone know how to hide a rightBarButtonItem of a UINavigationController? In my application, I have an edit button as a rightBarButtonItem of a UINavigationController. I want to hide this ? UIBarButton` when some operations are done.
推荐答案
隐藏右键： self.navigationItem.rightBarButtonItem = nil;
现在，要显示它：
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如果您在视图控制器中设置了右键，将其分配给self.editButtonItem，则只需再次指定它以显示它：
If you setup the right button in your view controller by assigning it to self.editButtonItem then simply assign it again in order to show it:
self .navigationItem.rightBarButtonItem = self.editButtonItem;
self.navigationItem.rightBarButtonItem = self.editButtonItem;
如果通过分配和启动UIBarButtonItem在视图控制器中设置右键，则只需保留对视图控制器中的UIBarButtonItem，并在需要显示时再次分配。
If you setup the right button in your view controller by allocating and initing a UIBarButtonItem, then simply keep a reference to the UIBarButtonItem in your view controller, and assign it again when you need to show it.
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