Non-retaining array for delegates

Question

In a Cocoa Touch project, I need a specific class to have not only a single delegate object, but many of them.

It looks like I should create an NSArray for these del

Answer 1

I'd suggest to not-fight-the-framework and use NSPointerArray with the NSPointerFunctionsWeakMemory NSPointerFunctionOption like this:

NSPointerArray *weakReferencingArray = [NSPointerArray pointerArrayWithOptions:NSPointerFunctionsWeakMemory];

// NSPointerFunctionsWeakMemory - Uses weak read and write barriers 
// appropriate for ARC or GC. Using NSPointerFunctionsWeakMemory 
// object references will turn to NULL on last release.

Served me well in scenarios, where I had to design a delegates array, which auto-NULL's references.