UITextView限制字数与行数

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{     CGFloat textHeight = textView.contentSize.height;     NSLog(@"%@",[NSString stringWithFormat:@"%f",textHeight]);     if (range.location > COMMENTMAXTEXT )//([textView.text length] + [text length] - range.length >250     {          _textView.text = [_textView.text substringToIndex:COMMENTMAXTEXT];         return  NO;     }     else if (textView.contentSize.height >= COMMENTMAXROWHEIGHT  ){//正好是最8行                   textView.text = [textView.text substringToIndex:[textView.text length]-1];         return NO;     }     else     {         return YES;     } }   - (void)textViewDidChange:(UITextView *)textView{           if(textView.contentSize.height >= COMMENTMAXROWHEIGHT) {         [MBProgressHUD showError:@"最多只能输入8行"];         _textView.text = [textView.text substringToIndex:[textView.text length]-1];     }else if(textView.text.length > COMMENTMAXTEXT){         _textView.text = [_textView.text substringToIndex:COMMENTMAXTEXT];           [MBProgressHUD showError:@"最多只能输入250个字"];     }       //    NSLog(@"%s",__func__); }