Objective-C: NSArray of weak references

Need an array of weak references? e.g. for delegates. Here’s some good tips.

One convenient way is to box it in a NSValue with a non-retained object.

NSValue *value = [NSValue valueWithNonretainedObjectValue:myObj];
[array addObject:value];

and when you get the object:

value = [array objectAtIndex:x];
myObj = [value nonretainedObjectValue];