NSPredicate with regex to check alphanumeric

nspredicate, objective-c, regex

Solution

Try like this: (Untested, just to give you an starter)

NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[a-z0-9]*"
                                                                       options:NSRegularExpressionCaseInsensitive
                                                                         error:&error];
NSArray *matches = [regex matchesInString:cardNumber.text
                                  options:0
                                    range:NSMakeRange(0, [string length])];

if([matches count] > 0)
{
   // Valid input
}

Problem

I want to check string with regex in Objective c. My code ``` NSString *regexAmazonOrder =@"[a-zA-Z0-9]*"; NSPredicate *predicateAmazonOrder = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regexAmazonOrder]; if([predicateAmazonOrder evaluateWithObject:cardNumber.text]) { NSLog(@"Its coming inside AMAZON ORDER EVALUATIONS"); ... } ``` But its not working. Help me out. I know its simple but eating my mind!!! Thanks

Original source