CHRTextFieldFormatter

CHRTextFieldFormatter allows you to apply an input mask to a UITextField instance.

Features

Does not mute Copy/Cut/Paste events.
Correctly calculates cursor position.
Does not require UITextField subclassing.
Provides CHRTextMask interface to allow custom text masking algorithm implementation.
Subclasses NSFormatter.

Implemented Masks

There are two kind of masks available:

CHRPhoneNumberMask to apply cellular phone number mask.
CHRCardNumberMask to apply credit card number mask.

Phone Number Mask

Phone number mask can be configured to have non-deletable prefix. For example:

    CHRPhoneNumberMask *mask = [CHRPhoneNumberMask new];
    mask.prefix = @"+7";

Installation

Drag *.h and *.m files to your project.

Usage

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.phoneNumberFormatter = [[CHRTextFieldFormatter alloc] initWithTextField:self.phoneNumberTextField mask:[CHRPhoneNumberMask new]];
    self.cardNumberFormatter = [[CHRTextFieldFormatter alloc] initWithTextField:self.cardNumberTextField mask:[CHRCardNumberMask new]];
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
    if (textField == self.phoneNumberTextField) {
        return [self.phoneNumberFormatter textField:textField shouldChangeCharactersInRange:range replacementString:string];
    } else if (textField == self.cardNumberTextField) {
        return [self.cardNumberFormatter textField:textField shouldChangeCharactersInRange:range replacementString:string];
    } else {
        return YES;
    }
}