Question

I am using the following code to display phone number in text field in the following format

and the format is 123-456-7890

and the code is working fine

and the code is as follows

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


NSCharacterSet *numSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789-"];
NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string];
int charCount = [newString length]; 

if ([string isEqualToString:@""]) 
{
    return YES;
} 

if ([newString rangeOfCharacterFromSet:[numSet invertedSet]].location != NSNotFound|| [string rangeOfString:@"-"].location != NSNotFound|| charCount > 12) {
    return NO;
}

if (charCount == 3 || charCount == 7) {
    newString = [newString stringByAppendingString:@"-"];
}

amountField.text = newString;

return NO;


}

I am using the UItextfield delegate method.

But when I am editing the text field up to “-” that mean (if i tried to change the number in text field 123-456-7890 it is not validating that mean 123-456 if i again enter the remaining number from here it is displaying as 123-4567890

can any one please help me how to validate this thing

Answer 1

You have a good tutorial about validating both US and international phone numbers

http://blog.stevenlevithan.com/archives/validate-phone-number