I need to validate text entered,if it's not in correct form it should be underlined in red and if correct should underline in green

Question

Thes is my code and i want to add underline part but i don't know how.

   #define ACCEPTABLE_CHARECTERS @"0123456789"


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

if (textField==ucontact)
{        NSUInteger newLength = [textField.text length] + [string length] - range.length;

    NSCharacterSet *cs = [[NSCharacterSet characterSetWithCharactersInString:ACCEPTABLE_CHARECTERS] invertedSet];

    NSString *filtered = [[string componentsSeparatedByCharactersInSet:cs] componentsJoinedByString:@""];

    return (([string isEqualToString:filtered])&&(newLength <= 10));

}
return YES;
}

Of course that's possible, just create an NSAttributedString with the properties you want (there are plenty of questions on SO for that) and set the text fields `attributedText` property. — HAS, Sep 19 '16 at 06:12

Nikita Sharma Sahu · Answer 1 · 2016-09-19T06:16:32.067

1

You can achieve it through the work around. You can add one line with the help of UIView below the textField and name it as the validatorView and change the color of the line according to your wish after validation.

Hope this helps best luck.

edited Sep 19 '16 at 06:16

answered Sep 19 '16 at 06:03

Nikita Sharma Sahu

337
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score 0 · Answer 2 · edited May 23 '17 at 10:27

0

You can have a look at this question. It illustrates how you can make use of only the bottom border. Alternatively you can also add a line as a UIView subview.

I am curious why you do not use the Numpad keyboard.

textField.keyboardType = .NumberPad (Swift)

edited May 23 '17 at 10:27

Community

1
1

answered Sep 19 '16 at 05:53

Carien van Zyl

2,853
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I need to validate text entered,if it's not in correct form it should be underlined in red and if correct should underline in green

2 Answers2