iOS Dev (54) 鍵盤彈出後收起時View隨之移動

•  

• 添加監聽

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

  移除監聽

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

  事件處理函數

  - (void) changeContentViewPosition:(NSNotification *)notification{
  
      NSDictionary *userInfo = [notification userInfo];
      NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
      CGFloat keyBoardEndY = value.CGRectValue.origin.y;
  
      NSNumber *duration = [userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey];
      NSNumber *curve = [userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey];
  
      [UIView animateWithDuration:duration.doubleValue animations:^{
          [UIView setAnimationBeginsFromCurrentState:YES];
          [UIView setAnimationCurve:[curve intValue]];
          self.view.center = CGPointMake(self.view.center.x, keyBoardEndY - STATUS_BAR_HEIGHT - self.view.bounds.size.height/2.0);
      }];
  }
  

  Reference

  • http://www.cnblogs.com/programmer-blog/p/3265110.html