Formatter for numerical fields and UITextField category to use it easily while editing.
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];
}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
Aleksey Kozhevnikov