UITextView限制字数与行数

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{

CGFloat textHeight = textView.contentSize.height;

NSLog(@"%@",[NSString stringWithFormat:@"%f",textHeight]);

if (range.location>250  )

{

_textView.text = [_textView.text substringToIndex:5];

[MBProgressHUD showError:@"最多只能输入250个字"];

return  NO;

}else if (textView.contentSize.height >= 127){//正好是最8行,这里的127是根据textView.contentSize.height动态计算出来的

[MBProgressHUD showError:@"最多只能输入8行"];

textView.text = [textView.text substringToIndex:[textView.text length]-1];

return NO;

}

else

{

return YES;

}

}