监听键盘的弹出和关闭

监听键盘弹出

//增加监听，当键盘出现时收出消息
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow)
name:UIKeyboardWillShowNotification
object:nil];

- (void)keyboardWillShow {

NSLog(@"键盘弹出了");

}

监听键盘隐藏

//增加监听，当键退出时收出消息
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide)
name:UIKeyboardWillHideNotification
object:nil];

- (void)keyboardWillHide {

NSLog(@"键盘退出了");
}

学自:http://zhidao.baidu.com/link?url=aByBc8lpTYei6hzb2XTz46EQq2ygZkwaXGFPLlFXTzFkGLjzKc-WNXmi7Ib4cwBjZ6Ydizh7vT2zovWPqyABNo_hVBfpJ-zS6Sx1C3NcRLa