Formatter for numerical fields and UITextField category to use it easily while editing.

Usage

You can look at AKNumericFormatterSample project to see AKNumericFormatter in action.

Formatter usage:

NSString* numericInput = @"12345678901";
NSString* formattedInput = [AKNumericFormatter formatString:numericInput
                                                  usingMask:@"+*(***)***-**-**"
                                       placeholderCharacter:'*'];

Of course you will get @"+1(234)567-89-01"

To format UITextField's input on-the-fly while the text is being entered:

// Somewhere, let's say in viewDidLoad
self.textField.numericFormatter = [AKNumericFormatter formatterWithMask:@"+*(***)***-**-**"
                                                   placeholderCharacter:'*'];

Yep, it's easy and no subclassing.

iOS 5 Compatibility

It's working on iOS 5, but you should help it a little bit. Call alertDeleteBackwards method in your UITextField delegate's shouldChangeCharactersInRange:replacementString: method when replacementString parameter has zero length:

#pragma mark - UITextFieldDelegate

-(BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string
{
  if (string.length == 0 ) {
    [self.textField alertDeleteBackwards];
  }
  return [super textField:textField shouldChangeCharactersInRange:range replacementString:string];
}

Installation

The best approach is to use CocoaPods.

Install CocoaPods gem if it's not installed yet and setup its enviroment:

$ [sudo] gem install cocoapods
$ pod setup

Go to the directory containing your project's .xcodeproj file and create Podfile:

$ cd ~/Projects/MyProject
$ vim Podfile

Add the following lines to Podfile:

platform :ios
pod 'AKNumericFormatter'

Finally install your pod dependencies:

$ [sudo] pod install

That's all, now open just created .xcworkspace file

Contact

Aleksey Kozhevnikov

• blackm00n on GitHub
• [email protected]
• @kozhevnikoff