跟为textView设置提示性文字一样 需要在textView的代理方法中实现如下
如有偏差 请谅解
定义UITextView，实现UITextViewDelegate:
-(UITextView *)textView{ if (!_textView) { //http://www.cnblogs.com/xiaofeixiang/ _textView=[[UITextView alloc]initWithFrame:CGRectMake(30, 200, CGRectGetWidth([[UIScreen mainScreen] bounds])-60, 30)]; [_textView setTextColor:[UIColor redColor]]; [_textView.layer setBorderColor:[[UIColor blackColor] CGColor]]; [_textView setFont:[UIFont systemFontOfSize:15]]; [_textView.layer setBorderWidth:1.0f]; [_textView setDelegate:self]; } return _textView;}-(void)textViewDidChange:(UITextView *)textView{ //博客园-FlyElephant static CGFloat maxHeight =60.0f; CGRect frame = textView.frame; CGSize constraintSize = CGSizeMake(frame.size.width, MAXFLOAT); CGSize size = [textView sizeThatFits:constraintSize]; if (size.height<=frame.size.height) { size.height=frame.size.height; }else{ if (size.height >= maxHeight) { size.height = maxHeight; textView.scrollEnabled = YES; // 允许滚动 } else { textView.scrollEnabled = NO; // 不允许滚动 } } textView.frame = CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, size.height);}