Calling methods of view controller from app delegate class

Question

When my app will enter foreground, I need to call some methods of my view controller from the app delegate class. How is the best way to realise it?

I try to create a "fake" notification in "applicationWillEnterForeground" method:

[NSNotificationCenter defaultCenter]postNotificationName:@"test" object:nil];

And add observer in view controller:

[self addObserver: self selector:@selector(testMethod) name:@"test" object:nil];

Which approach is better and why?

PS Sorry for my bad english.

possible duplicate of [how to call the method one class to another class in obj c](http://stackoverflow.com/questions/28473878/how-to-call-the-method-one-class-to-another-class-in-obj-c) — jscs, Feb 12 '15 at 21:14

score 0 · Answer 1 · answered Feb 12 '15 at 17:15

0

Quick Answer:

Yes, that should work with your "fake" notification
But why should you do so? You could let your viewController do all the things without die AppDelegate -> just call your methods, that you want to be done in the 'viewDidLoad'-method of your viewController. (I assume, your viewController is the entry point of your App)

answered Feb 12 '15 at 17:15

LukeSideWalker

Load-time is not the only time an app will enter foreground. – Bryan Feb 13 '15 at 13:20

score 0 · Answer 2 · edited May 23 '17 at 11:56

0

Notification will support many destinations, whereas the answer here only supports one viewController being told what to do.

On the other hand, calling directly through a reference is easier to understand and to debug.

I don't understand why you call it a "fake" notification - this is exactly how that call is meant to be used.

edited May 23 '17 at 11:56

Community

answered Feb 13 '15 at 13:23

Bryan

2 Answers2