本文介绍了确定何时解除UIMenuController？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
有没有办法确定何时取消UIMenuController？我有一个（不可编辑的）文本区域，我在菜单显示时突出显示，当他们选择一个项目（简单）或取消（不可能？）时，我想取消突出显示它。
Is there a way to determine when a UIMenuController has been dismissed? I have a (non-editable) text area I'm highlighting when the menu is brought up, and I'd like to un-highlight it when they either select an item (easy) or cancel (not possible?)
推荐答案
在状态更改时，UIMenuController会将通知发布到默认的NSNotification中心。您可以订阅它们以在系统隐藏菜单时收到通知：
On state changes UIMenuController posts notifications to the default NSNotification center. You can subscribe to them to get notified when the system hides the menu:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willHideEditMenu:) name:UIMenuControllerWillHideMenuNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didHideEditMenu:) name:UIMenuControllerDidHideMenuNotification object:nil];
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