Declaring and checking/comparing (bitmask-)enums in Objective-C

Question

You know in Cocoa there is this thing, for example you can create a UIView and do:

view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIV         


        

Answer 1

Useful function you can use for bitmask checking to improve readability.

BOOL bitmaskContains(NSUInteger bitmask, NSUInteger contains) {
    return (bitmask & contains) != 0;
}