A way to handle NSNotification’s observation token
If you are working with closure based NSNotification’s implementation, you have to deal with returned `tokens`. The simplest way to store reference to them is to keep them in a property:
Situation complicates when we have to store more than one token.
We can solve it by keeping references in the array:
If we wouldn’t like to create temporary constants
didBecomeActiveToken, there are at least two ways to solve it.
Let’s start with more obvious one:
I leave it to you to judge this implementation.
I would like to share with you another way to handle it. First step is to introduce
It’s a class inspired by Disposables concept which I got know when I was working with RxSwift.
Next step is to extend NSObjectProtocol protocol:
Having those two pieces we can write something like this:
Which one is the best? It depends on your taste. I just wanted to present you an alternative approach.
My github: https://github.com/adiki/
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