NSInteger to another View

I need to pass an NSInteger to my Other View Controller:

NSInteger index = [carousel indexOfItemView:sender];

This was implemented in a UIButton, Im thinking of using the NSUserDefaults like this sample code here:

[[NSUserDefaults standardUserDefaults] setObject:4 forKey:@"integer"];[[NSUserDefaults standardUserDefaults] synchronize];

But I can't do it with my code above.Is there other methods.