如何检查iPad键盘的隐藏按钮是否被按下? [英] How can I check if the hide button pf iPad's keyboard was pressed?

问题描述

我想触发一个函数，该函数将取决于用户用来为textField的第一响应者签名的方法.如果通过选择另一个textField对其进行了签名，则它将不执行任何操作，否则将触发一个函数.这可能吗?

I want to trigger a function that will depend on which method the user used to resign a textField's first responder. If it was resigned by selecting another textField, it does nothing, else triggers a function. Is this possible?

推荐答案

了解如何操作.您只需要听UIKeyboardWillHideNotification通知:

Found out how. You just have to listen to the UIKeyboardWillHideNotification notification:

- (void)viewDidLoad {

    [super viewDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(methodYouWantToCall) name:UIKeyboardWillHideNotification object:nil];
}

- (void)methodYouWantToCall {

    //Do anything you want here

}

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