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 from the link above.
How to use CocoaPods? Go to: https://github.com/CocoaPods/CocoaPods
Add the following line to your pod file:
pod 'US2FormValidator', '~> 1.1.2'
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);
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 the interface.
#import <Foundation/Foundation.h>
#import "US2Condition.h"
@interface MyProjectConditionName : US2Condition
@end
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";
}
@end
Create the interface.
#import <Foundation/Foundation.h>
#import "US2Validator.h"
#pragma mark - Validator interface
@interface MyProjectValidatorName : US2Validator
{
}
@end
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
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