Regx Validation in IOS

Email validation using Regx in iOS

+(BOOL) isValidEmail:(NSString *)email

{

    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];

    return [emailTest evaluateWithObject:email];

}

Phone number validation using Regx in iOS

+(BOOL) isValidPhone:(NSString *)phone

{

    NSString *phoneRegex = @"[235689][0-9]{6}([0-9]{3})?";

    NSPredicate *test = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", phoneRegex];

    return [test evaluateWithObject:phone];

}

Password validation using Regx in iOS

+(BOOL) isPasswordValid:(NSString *)pwd

{

    if ( [pwd length]<6 || [pwd length]>32 ) return NO;  // too long or too short

    NSRange rang;

    rang = [pwd rangeOfCharacterFromSet:[NSCharacterSet letterCharacterSet]];

    if ( !rang.length ) return NO;  // no letter

    rang = [pwd rangeOfCharacterFromSet:[NSCharacterSet decimalDigitCharacterSet]];

    if ( !rang.length )  return NO;  // no number;

    return YES;

}