Latest 1.1.2
License MIT
Platforms ios
Authors , ,

![Import framework screen]( Validator Sample Preview.png)

ustwo™ iOS Form Validator

Build Status

This framework allows you to validate inputs of text fields and text views in a convenient way.


  • Simply use US2ValidatorTextField instead of UITextField (US2ValidatorTextView instead of UITextView)
  • Know what went wrong and where
  • Create own conditions using regular expressions for example
  • Create own validators which contain a collection of conditions


Clone the project

Clone the project from the link above.

Import the framework project into your project

![Import framework screen]( Framework.png)

Set target dependencies

![Target dependencies screen]( Dependencies.png)

Add US2Localizable.strings to your projects Copy Bundle Resources

![Target dependencies screen]( Resources.png)

Installation using CocoaPods

How to use CocoaPods? Go to:

Add the following line to your pod file:

pod 'US2FormValidator', '~> 1.1.2'


Add a condition to validator

US2Validator *validator = [[US2Validator alloc] init];

US2ConditionAlphabetic *condition = [[US2ConditionAlphabetic alloc] init];
[validator addCondition:condition];
[condition release];

US2ConditionCollection *conditionCollection1 = [validator checkConditions:@"HelloWorld"];
US2ConditionCollection *conditionCollection2 = [validator checkConditions:@"Hello World 123"];

BOOL isValid = conditionCollection1 == nil;                                                  // isValid == YES
isValid = conditionCollection2 == nil;                                                       // isValid == NO

// What went wrong?
NSLog(@"conditionCollection2: %@", conditionCollection2);

Add a validation text field

US2ValidatorTextField *firstNameTextField  = [[US2ValidatorTextField alloc] init];
firstNameTextField.validator               = [[[MyProjectValidatorName alloc] init] autorelease];
firstNameTextField.shouldAllowViolation    = YES;
firstNameTextField.validateOnFocusLossOnly = YES;
firstNameTextField.placeholder             = @"Enter first name";
firstNameTextField.validatorUIDelegate     = self;
[_textUICollection addObject:firstNameTextField];
[firstNameTextField release];

Create own condition

Create the interface.

#import <Foundation/Foundation.h>
#import "US2Condition.h"

@interface MyProjectConditionName : US2Condition


Create the implementation.

#import "MyProjectConditionName.h"

@implementation MyProjectConditionName

- (BOOL)check:(NSString *)string
    if (nil == string)
        string = [NSString string];

    self.regexString = @"[a-zA-Z .-]";

    return [super check:string];

#pragma mark - Allow violation

- (BOOL)shouldAllowViolation
    return YES;

#pragma mark - Localization

- (NSString *)localizedViolationString
    return @"Not a valid name";


Create own validator

Create the interface.

#import <Foundation/Foundation.h>
#import "US2Validator.h"

#pragma mark - Validator interface

@interface MyProjectValidatorName : US2Validator


Create the implementation.

#import "MyProjectValidatorName.h"
#import "MyProjectConditionName.h"
#import "US2ConditionRange.h"

@implementation MyProjectValidatorName

#pragma mark - Initialization

- (id)init
    self = [super init];
    if (self)
        [self addCondition:[[[MyProjectConditionName alloc] init] autorelease]];

        US2ConditionRange *rangeCondition   = [[[US2ConditionRange alloc] init] autorelease];
        rangeCondition.range                = NSMakeRange(2, UINT16_MAX);
        rangeCondition.shouldAllowViolation = YES;

        [self addCondition:rangeCondition];

    return self;

@end alpha

Latest podspec

    "name": "US2FormValidator",
    "version": "1.1.2",
    "license": "MIT",
    "summary": "A lightweight iOS form validation framework.",
    "homepage": "",
    "authors": {
        "Martin Stolz": "[email protected]",
        "Alex Fish": "[email protected]",
        "Mio Nilsson": "[email protected]"
    "description": "This framework allows you to validate inputs of text fields and text views in a convenient way. Add your own validators and dependencies of validations.",
    "platforms": {
        "ios": null
    "source": {
        "git": "",
        "tag": "1.1.2"
    "source_files": "US2FormValidationFramework/source/**/*.{h,m}",
    "resources": "US2FormValidationFramework/US2Localizable/*",
    "preserve_paths": [
    "requires_arc": false

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