UITextView垂直居中和自动扩充

UITextView的文字垂直居中和自动伸缩大小

在UITextView的代理方法里面

-(void)textViewDidChange:(UITextView *)textView{    //自动调整textView高度        CGFloat temp = textView.contentSize.height - textView.frame.size.height;        textView.frame = CGRectMake(textView.frame.origin.x, textView.frame.origin.y, textView.frame.size.width, textView.contentSize.height);//        _textEditBackView.frame = CGRectMake(_textEditBackView.frame.origin.x, _textEditBackView.frame.origin.y - temp, _textEditBackView.frame.size.width, _textEditBackView.frame.size.height + temp);//        _messageTable.frame = CGRectMake(_messageTable.frame.origin.x, _messageTable.frame.origin.y, _messageTable.frame.size.width, _messageTable.frame.size.height - temp);//    _placeHolderLabel.frame = textView.bounds;    }