• • 注册键盘通知

  #pragma mark - 键盘通知- (void)addNoticeForKeyboard {    //注册键盘出现的通知    [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(keyboardWillShow:)                                                 name:UIKeyboardWillShowNotification object:nil];    //注册键盘消失的通知    [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(keyboardWillHide:)                                                 name:UIKeyboardWillHideNotification object:nil];}

  • 键盘代理事件

  ///键盘显示事件- (void) keyboardWillShow:(NSNotification *)notification {    //获取键盘高度，在不同设备上，以及中英文下是不同的    CGFloat kbHeight = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;    //计算出键盘顶端到inputTextView panel底端的距离(加上自定义的缓冲距离INTERVAL_KEYBOARD)    CGFloat offset = (textView.frame.origin.y+textView.frame.size.height+INTERVAL_KEYBOARD) - (self.view.frame.size.height - kbHeight);    // 取得键盘的动画时间，这样可以在视图上移的时候更连贯    double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];    //将视图上移计算好的偏移    if(offset > 0) {        [UIView animateWithDuration:duration animations:^{            self.view.frame = CGRectMake(0.0f, -offset, self.view.frame.size.width, self.view.frame.size.height);        }];    }}///键盘消失事件- (void) keyboardWillHide:(NSNotification *)notify {    // 键盘动画时间    double duration = [[notify.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];    //视图下沉恢复原状    [UIView animateWithDuration:duration animations:^{        self.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);    }];}
  作者：奋斗的蜗牛
  链接：http://www.jianshu.com/p/4e235e952b0c
  來源：简书