iOS7光标问题

iOS7光标问题

有网友遇到textView在ios7上出现编辑进入最后一行时光标消失，看不到最后一行，变成盲打，stackOverFlow网站上有大神指出，是ios7本身bug，加上下面一段代码即可（网友调试得出，在此mark一下，有问题，欢迎大神们指出）

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-(void)textViewDidChange:(UITextView *)textView {     CGRect line = [textView caretRectForPosition:                    textView.selectedTextRange.start];     CGFloat overflow = line.origin.y + line.size.height     - ( textView.contentOffset.y + textView.bounds.size.height        - textView.contentInset.bottom - textView.contentInset.top );     if ( overflow > 0 ) {         // We are at the bottom of the visible text and introduced a line feed, scroll down (iOS 7 does not do it)         // Scroll caret to visible area         CGPoint offset = textView.contentOffset;         offset.y += overflow + 7; // leave 7 pixels margin         // Cannot animate with setContentOffset:animated: or caret will not appear         [UIView animateWithDuration:.2 animations:^{             [textView setContentOffset:offset];         }];     } }