Random an Array in iPhone

NSInteger randomize(id num1, id num2, void *context)
{
    int rand = arc4random() %2;
    if (rand)
        return NSOrderedAscending;
    else
        return NSOrderedDescending;
}
NSMutableArray *temp=[[NSMutableArray alloc] init];
    for ( int i=0; i<=10; i++) {
        [temp addObject:[NSString stringWithFormat:@"%d",i]];
    }
[temp sortUsingFunction:randomize context:NULL];
NSLog(@"%@",temp);