键盘的监听事件

1.用通知中心监听键盘的活动

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(keyboardWillShow:)name:UIKeyboardWillShowNotificationobject:nil];[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(keyboardWillHiden:)name:UIKeyboardDidHideNotificationobject:nil];

2.收起隐藏的方法

//键盘将要出现

- (void)keyboardWillShow:(NSNotificationCenter*)center{

      _text.backgroundColor= [UIColorcyanColor];

}

//键盘将要隐藏

- (void)keyboardWillHiden:(NSNotificationCenter*)center{

     _text.backgroundColor= [UIColorblueColor];

}

//点击屏幕隐藏键盘

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent*)event{

      [_textresignFirstResponder];

}