A custom formatter to deal with an international phone number inside a UITextField.

You can install STPhoneFormatter from CocoaPods or manually. If you choose the most annoying method, please include these 3 files:

• STPhoneFormatter.h
• STPhoneFormatter.m
• FormatsCountriesPhone.plist

Two different formats of phone number are available: the formatted one @property formattedPhoneNumber and the unformatted one - (NSString *)internationalPhoneNumber.

You can access to the country's code and name with the @property countryCode and @property countryName.

Also, you can customize the format of the phone number by setting the country with the method - (BOOL)setCountryCode:(NSString *)countryCode;. The country's code must respect the ISO 3166.

If you want to contribute by adding more country, please submit your own .plist by a pull request.

Build and run the project STPhoneFormatterExample in Xcode to see STPhoneFormatter in action.

The first thing to do is to set the delegate of your UITextField and in the delegate method (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string to add this:

BOOL phoneNumberHasChanged = [[STPhoneFormatter phoneFormatter] phoneNumberMustChangeInRange:range replacementString:string];
        
if (phoneNumberHasChanged) {
	textField.text = [[STPhoneFormatter phoneFormatter] formattedPhoneNumber];
}
        
return NO;

IMPORTANT: Don't forget to return the value NO.

Sebastien Thiebaud

• http://github.com/SebastienThiebaud
• http://twitter.com/SebThiebaud

STPhoneFormatter is available under the MIT license.