Question

I used to declare all delegate properties as

@property (assign) id<FooDelegate> delegate;

I was under the impression that all assign properties should now be weak pointers, is this correct?
If I try to declare as:

@property (weak) id<FooDelegate> delegate;

I get an error while trying to @synthesize (autogenerated weak properties are not supported).

What’s the best practice in this case?

Answer 1

Use __unsafe_unretained instead weak for ARC projects targeting iOS 4 and 5. The only difference is that weak nils the pointer when deallocated, and it’s only supported in iOS 5.

Your other question is answered in Why are Objective-C delegates usually given the property assign instead of retain?.