Best way to enum NSString

Question

Im digging for ways to enum objc object such as NSString, I remember there a new feature in a version of Xcode4+ which offering a new way to enum , but not clearly. Anyone know

Answer 1

Alternative way to use struct:

extern const struct AMPlayerStateReadable
{
    __unsafe_unretained NSString *ready;
    __unsafe_unretained NSString *completed;
    __unsafe_unretained NSString *playing;
    __unsafe_unretained NSString *paused;
    __unsafe_unretained NSString *broken;
} AMPlayerState;

const struct AMPlayerStateReadable AMPlayerState =
{
    .ready = @"READY",
    .completed = @"COMPLETE",
    .playing = @"PLAYING",
    .paused = @"PAUSED",
    .broken = @"BROKEN"
};

Then you can use like this:

NSString *status = AMPlayerState.ready;

Easy to use, readable. Would be nice if someone update/edit answer with advantages/disadvantages of this approach.