What comes first applicationWillResignActive app delegate method or the Notification for the same event?

Question

In my app delegate I save(persist) an object when the applicationWillResignActive: method is called. I have a view controller which responds to UIApplicationWillResignActiveNotification and makes a modification to the previously mentioned object but doesn't save(persist) the object itself. What I need to know is if that change will be persisted trough the applicationWillResignActive: method or if I should explicitly save it in the view controller just to be sure?

Edit: NSLog test result is: 1st is the delegate method, 2nd it is the Notification method.

I wasn't sure the test would guarantee me that the order will be the same every time because I don't know how notification center works. That is why I posted the question before testing and giving results.

It is a `NSObject` which has `NSCoding` protocol implemented and is written to a file in order to save(persist) it. — h3dkandi, Oct 11 '16 at 14:20
@h3dkandi Just use `NSLog(...)` to find out. You can post the results as an answer below. — Jed Fox, Oct 11 '16 at 14:23
It would make a nice bookend with this http://stackoverflow.com/a/15864784/294949 — danh, Oct 11 '16 at 15:00

score 3 · Accepted Answer · answered Oct 11 '16 at 14:23

The documentation for applicationWillResignActive: says, "After calling this method, the app also posts a UIApplicationWillResignActiveNotification notification to give interested objects a chance to respond to the transition."

The "after" makes me believe that you will not get the changed value inside applicationWillResignActive:.

Of course, inserting a couple of NSLog lines would let you prove the order of operation for yourself.

What comes first applicationWillResignActive app delegate method or the Notification for the same event?

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