How to use enums with bit flags
Yes, use bitwise OR (|) to set multiple flags:
ColorType pinkColor = kWhite | kRed;Then use bitwise AND (&) to test if a flag is set:
if ( pinkColor & kRed ){ // do something}The result of & has any bit set only if the same bit is set in both operands. Since the only bit in kRed is bit 1, the result will be 0 if the other operand doesn't have this bit set too.
If you need to get whether a particular flag is set as a BOOL rather than just testing it in an if condition immediately, compare the result of the bitwise AND to the tested bit:
BOOL hasRed = ((pinkColor & kRed) == kRed);