Validate phone number ios

Question

I need to validate an international phone number.

I know its difficult to validate an international phone number, so I\'m going to keep it simple:

+

Answer 1

Easy way to validate phone number and password limit , just follow the below process.

if ((self.mobileTxtFld.text.length < 10 )) {
    [_mobileTxtFld becomeFirstResponder];
}
else if ((self.passwordTxtFld.text.length < kPasswordCharacterMinLimit) || (self.passwordTxtFld.text.length > kPasswordCharacterMaxLimit)) {
    // show alert
}

after that you can implement textfiled delegate method "shouldChangeCharactersInRange" in that just write this code

if (textField == _mobileTxtFld) {
    if([string rangeOfCharacterFromSet:ALLOWED_NUMBERS].location == NSNotFound){
        NSUInteger newLength = [textField.text length] + [string length] - range.length;
        if(newLength > kMobileNumberLimit - 1){
            if(textField.text.length != kMobileNumberLimit){
                textField.text  = [NSString stringWithFormat:@"%@%@",textField.text,string];
            }
            [textField resignFirstResponder];
            return NO;
        }
        else{
            return YES;
        }
    }
    else{
        return NO;
    }
}

return YES;

here ALLOWED_NUMBERS and kMobileNumberLimit are

#define kMobileNumberLimit 10
#define ALLOWED_NUMBERS [[NSCharacterSet decimalDigitCharacterSet] invertedSet]
#define minLimit 6
#define maxLimit 17