Answer by ArtFeel for NSArray of weak references (__unsafe_unretained) to objects under ARC

The simplest solution:

NSMutableArray *array = (__bridge_transfer NSMutableArray *)CFArrayCreateMutable(nil, 0, nil);NSMutableDictionary *dictionary = (__bridge_transfer NSMutableDictionary *)CFDictionaryCreateMutable(nil, 0, nil, nil);NSMutableSet *set = (__bridge_transfer NSMutableSet *)CFSetCreateMutable(nil, 0, nil);

Note: And this works on iOS 4.x too.