iPhone 4S和iPod型号UIView在文本输入时位于键盘后面

Question

我有一个带有UITextView的UIView，里面有2个按钮。当用户想要评论帖子时，视图会移动到键盘上方（这样可以正常工作）。

当用户开始输入文本时，UIView和UITextView将相应增长到内容。这适用于除iPod和iPhone 4S之外的所有设备。在这些设备上，textView和UIView在键盘后面增长。我试过改变垂直内容压缩阻力优先级，但无济于事。

iPhone 4s：

iPhone 7：

代码的时间：

    - (void)textViewDidChange:(UITextView *)textView {
    [self updateInputPanel];
}

- (void)updateInputPanel {
    __weak __typeof__(self) weakSelf = self;
    dispatch_async (dispatch_get_main_queue (), ^{
      __typeof__(self) strongSelf = weakSelf;
      CGFloat widthText = textInput.frame.size.width, heightText;
      CGSize sizeText = [textInput sizeThatFits:CGSizeMake (widthText, MAXFLOAT)];
      heightText = fmaxf (36.5, sizeText.height);
      heightText = fminf (110.0, heightText);

      CGFloat heightInput = heightText + (51.0 - 36.5);

      CGRect frameViewInput = viewInput.frame;
      frameViewInput.origin.y = heightView - heightInput;
      frameViewInput.size.height = heightInput;
      viewInput.frame = frameViewInput;

      [viewInput layoutIfNeeded];

      CGRect frameTextInput = textInput.frame;
      frameTextInput.size.height = heightText;
      textInput.frame = frameTextInput;

      CGPoint offset = CGPointMake (0, sizeText.height - heightText);
      [textInput setContentOffset:offset animated:NO];

      [strongSelf scrollToBottom:NO];
    });
 }

    - (void)keyboardShow:(NSNotification *)notification {
    NSDictionary *info = [notification userInfo];
    CGRect keyboard = [[info valueForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
    NSTimeInterval duration = [[info valueForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    CGFloat heightKeyboard = keyboard.size.height;

    [UIView animateWithDuration:duration
                          delay:0
                        options:UIViewAnimationOptionAllowUserInteraction
                     animations:^{
                       self.view.center = CGPointMake (centerView.x, centerView.y - heightKeyboard);
                     }
                     completion:nil];
}