How to store non-objects in a dictionary?

Question

I tried storing a selector(SEL) in a NSMutableDictionary and it caused a crash, probably because the dictionary tries to dereference it as an object pointer. What is the standard recipe for storing non-objects in a dictionary?

Answer 1

You can convert selectors to NSString using NSStringFromSelector() and you can go back the other way with NSSelectorFromString().

SEL aSel = @selector(takeThis:andThat:);

[myDict setObject:NSStringFromSelector(aSel) forKey:someKey];

SEL original = NSSelectorFromString([myDict objectForKey:someKey]);