Ios 首先放置视图，使文本的最后一部分可见 CGFloat offsetY=textSize.height-textViewHeight； （或）测试插入符号是否位于文本的中间位置。 如果（（caret.origin.y+（textViewHeight/2）），

首先放置视图，使文本的最后一部分可见 CGFloat offsetY=textSize.height-textViewHeight； （或）测试插入符号是否位于文本的中间位置。

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如果（（caret.origin.y+（textViewHeight/2）），很遗憾，这并不能解决我的问题。但是感谢您的回复！我错了！它确实解决了我的问题。我仍然有一些逻辑，在某些情况下阻止滚动。非常感谢！

// in the text view's delegate
- (void)textViewDidChangeSelection:(UITextView *)textView
{
  [textView scrollRangeToVisible:textView.selectedRange];
}

- (void)textViewDidBeginEditing:(UITextView *)textView {
    CGRect caret = [textView caretRectForPosition:textView.selectedTextRange.start];
    UIEdgeInsets textInsets = textView.textContainerInset;
    CGFloat textViewHeight = textView.frame.size.height - textInsets.top - textInsets.bottom;
    // only reposition the scroll view if the caret position is out of view
    if (textViewHeight < caret.origin.y) {
        CGSize textSize = [textView.layoutManager usedRectForTextContainer:textView.textContainer].size;
        // initially place the view such that the last part of the text is visible
        CGFloat offsetY = textSize.height - textViewHeight;
        // test to see if the caret is in the middle of the text somewhere
        if ((caret.origin.y + (textViewHeight / 2)) <= textSize.height) {
            // we can, so center the caret in the middle of the view
            offsetY = caret.origin.y - (textViewHeight / 2);
        }
        // the offset indicates the point in the scrollView that will correspond to the top left of the scrollView box
        // therefore, we need to subtract the text view height to place the caret at the bottom of the scrollView, rather than the top and some empty whitespace
        [self repositionScrollView:textView newOffset:CGPointMake(caret.origin.x, offsetY)];
    }
}

/**
 This method allows for changing of the content offset for a UIScrollView without triggering the scrollViewDidScroll: delegate method.
 */
- (void)repositionScrollView:(UIScrollView *)scrollView newOffset:(CGPoint)offset {
    CGRect scrollBounds = scrollView.bounds;
    scrollBounds.origin = offset;
    scrollView.bounds = scrollBounds;
}