How do I replace weak references when using ARC and targeting iOS 4.0?

Question

I\'ve begun developing my first iOS app with Xcode 4.2, and was targeting iOS 5.0 with a \"utility application\" template (the one that comes with a FlipsideViewController).

Answer 1

If only using weak references for additional safety, manually call the new runtime functions if they're available and fallback to simple assignment on __unsafe_unretained variables if not.

ZWRCompatibility.h will simplify this somewhat.