删除NSNotificationCenter观察者

Question

我通过在ViewDidLoad中添加此代码来检测键盘的显示/隐藏：

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(keyboardDidHide:) 
                                             name:UIKeyboardDidHideNotification 
                                           object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(keyboardWillShow:) 
                                             name:UIKeyboardWillShowNotification 
                                           object:nil];

虽然我想在不调用

的情况下删除这些观察者

 [[NSNotificationCenter defaultCenter] removeObserver:self];

因为这会删除所有观察者，而我还有其他观察者不希望被删除。我怎样才能删除那两个??

Answer 1

[[NSNotificationCenter defaultCenter] removeObserver:self 
                                                name:UIKeyboardDidHideNotification 
                                              object:nil];

[[NSNotificationCenter defaultCenter] removeObserver:self 
                                                name:UIKeyboardWillShowNotification 
                                              object:nil];

Answer 2

使用removeObserver:name:object:所述NSNotificationCentre {{1}}方法，删除特定通知名称的观察者。

Answer 3

使用[[NsNotificationCenter defaultCenter] removeObserver:self name: UIKeyboardWillShowNotification object:nil]