I'm planning to implement multi-task in my app.
I can see many methods here to do that in the AppDelegate like applicationWillResignActive, applicationDidEnterBackground, applicationWillEnterForeground, ...
But.... I don't see the way they should be used, nor why they are not in the ViewControllers... Nor what they are here for.
I mean : when the app enter in background, i don't know on which view my user is. And back, when the app comes into foreground, how would I know what to do and what I may call, to update the view for example ?
I would have understood if those methods where in each view controller, but here, I don't see what they can be used for in a concrete way...
Can you help me to understand the way to implement things into those methods ?