获取最顶层的UIViewController [英] Getting the top most UIViewController
问题描述
如果我在一个 UINavigationController 上推视图控制器和/或模态视图控制器，我如何找到最顶部 UIViewController ？或者在我的例子中，我想知道某个 UITableViewController 是否是最顶层的。
If I push view controllers and/or present modal view controllers on a UINavigationController, how can I find out what is the top most UIViewController? Or in my case, I want to know if a certain UITableViewController is the top most or not.
使用：
self.navigationController.topViewController == self
...但这不起作用。我猜测它的失败，因为我提出模态视图控制器顶部，并且 topViewController 只记录哪些视图推送在<$ c $
... but this doesn't work. I'm guessing that it's failing because I'm presenting modal view controllers on top of it and that the topViewController only keeps track of which views were pushed on the UINavigationController (as opposed to those that were presented modally).
推荐答案
您希望 visibleViewController ：
当前可见的视图可以属于顶部的视图控制器导航堆栈或以模态方式显示的视图控制器。
The currently visible view can belong either to the view controller at the top of the navigation stack or to a view controller that was presented modally.
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