注册监听键盘事件的通知

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注册监听键盘事件的通知
[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillShow:)
                                                 name:UIKeyboardWillShowNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardShow:)
                                                 name:UIKeyboardDidShowNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];
    
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardHide:)
                                                 name:UIKeyboardDidHideNotification
                                               object:nil];

 在键盘将要出现和隐藏的回调中

- (void)keyboardWillShows:(NSNotification *)notif

{

    CGRect frame = [[notif.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];

    CGFloat  offset= -frame.size.height;

    [UIView animateWithDuration:0.3 animations:^{

        CGRect  rect  =self.frame;

        rect.origin.y=offset;

        self.frame=rect;

    }];

}

- (void)keyboardWillHides:(NSNotification *)notif

{

    [UIView animateWithDuration:0.3 animations:^{

        CGRect  rect  =self.frame;

        rect.origin.y=0;

        self.frame=rect;

    }];

注册监听键盘事件的通知

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原文地址：http://www.cnblogs.com/woaixixi/p/4501250.html