Upvote:1
Aprove answer
NSSet *ids = [setOfSomeSubProtocols mapWithBlock:^id (id<SomeProtocol> object) {
return [[object someSubProtocolObject] identifier];
}];
NSLog(@"ids: %@", ids);
Upvote:1
[setOfSomeSubProtocols valueForKeyPath:PROTOCOL_KEYPATH(SomeSubProtocol, Id)];
Credit Goes to: stackoverflow.com
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