Code Quality Rank: L5
Programming language: Objective-C
License: MIT License
Tags: UI     Form    
Latest version: v0.1.3

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Form validation without any code!

APValidators is a codeless solution for form validation. Just connect everything right in Interface Builder and you're done. Supports really complex and extendable forms by allowing to connect validators in tree.


  • Tree structure for validation rules.
  • No need for any inheritance in UI classes. This means you can use any UITextField or UITextView subclasses and still use APValidators.
  • Easy to integrate to any codebase.
  • Perfect unit tests code coverage.


  1. Create your form UI in Interface Builder.
  2. In Interface builder add Object Object to your UIViewController for every validator.


  3. Assign custom class for every validator.

* `APRegexValidator` - validates over regex expression.
* `APRequiredValidator` - validates that string is not empty.
* `APZipValidator` - ZIP code validation. Must have two-letters country code assigned. Currently supports 151 countries.
* `APEmailValidator` - email validation.
* `APEqualValidator` - validates that two controls has equal text.
* `APBlockValidator` - invokes custom block for validation.
* `APCreditCardValidator` - validates credit card number by Luhn alghoritm. Also returns credit card type.
* `APCharactersCountValidator` - validates lenght of string by min and max characters count. 
* `APCompoundValidator` - allows to connect child validators. Will have valid state only if every child validator has valid state. Also returns `errorMessages` array of all not valid child validators `errorMessage` properties at the moment. 

![Assign subclass](/images/assign-class.png)
  1. Connect your UI-control validator property to validator Object. APValidators currently support only UITextField and UITextView subclasses.

    Connect validator

  2. Use APCompoundValidator if you need more than one validator for UI-control. Connect it to UI-control and all validators to it's validators property.

    Compound validator

  3. Use one APCompoundValidator as form validator and connect all other validators to it.

    Form validator


To run the example project, clone the repo, and run pod install from the Example directory first.


  • iOS 8.0 and higher
  • ARC


APValidators is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'APValidators'


Nickolay Sheika, [email protected]


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APValidators is available under the MIT license. See the LICENSE file for more info.

*Note that all licence references and agreements mentioned in the APValidators README section above are relevant to that project's source code only.