3 ms·ARC isn't even an iOS feature... it's a compiler feature.by jcromartie 14y agoARC isn't even an iOS feature... it's a compiler feature.0x0 14y agoweak refs in ARC require OS supportjsanz 14y agoYou can always use PLWeakCompatibility on iOS4: https://github.com/plausiblelabs/PLWeakCompatibility/ https://github.com/plausiblelabs/PLWeakCompatibility/