UITextField限制文本长度 ， UI控件 自适应宽高 。

------------------------------------------------------------------------------------------------------------------------------------------------

限制textField的文本长度 。

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {

    if (range.location >= 35) { return NO ;  };
    return YES;

}

-------------------------------------------------------------------  加班中ing ... ... -----------------------------------------------------------------------

UI控件自适应宽高 。

 CGSize lablesize = [columnPath sizeWithFont:chooseBtn.titleLabel.font constrainedToSize:CGSizeMake(MAXFLOAT, 30)];

        chooseBtn.backgroundColor = [UIColor hexChangeFloat:@"f9f9f9"];

        chooseBtn.frame = CGRectMake( 15 , 3 , lablesize.width + 12 , lablesize.height + 10 );

        [chooseBtn setTitleColor:[UIColor hexChangeFloat:@"62b8e8"] forState:UIControlStateNormal];

        [chooseBtn setTitle:columnPath forState:UIControlStateNormal];

        [richTextView reloadInputViews];