Weak Self in Blocks

Question

Do I need to check if weak self is nil in blocks?

I create weakSelf pointer like:

__weak typeof(self) weakSelf = self;

and in the b

Answer 1

It seems quite unnecessary since calling a message on nil is a no-op. (Nothing happens)

^{
    [weakSelf doSomething]; //Does nothing if weakSelf is nil
}

The only reason I can think you might want to do this is if other messages (not on self) shouldn't be called

^{
    // Here I don't want to add weakSelf as an observer if it's nil
    if (!weakSelf) return;

    [OtherClass addObserverForSomething:weakSelf];
}