How to call AppDelegate method from RootViewController without passing delegate?

Question

How to call the AppDelegate method from RootViewController without passing delegate?

Just wondering if there is a way to do this? (or I need to create a delegate object in the RootViewController to store a reference to AppDelegate)

Answer 1

[[[UIApplication sharedApplication] delegate] someMethod]; 

It works like a charm!

Answer 2

You can access the application delegate from any controller using

 MyDelegate* aDelegate = (MyDelegate *)[[UIApplication sharedApplication] delegate]; 

Answer 3

This happens so often that I always add the MyCustomAppDelegate method for this for me (so I don't have a lot of castings in my code.

 @implementation MyCustomAppDelegate () - (MyCustomAppDelegate *)appDelegate { return (MyCustomAppDelegate *)[[UIApplication sharedApplication] delegate]; } @end 

now i can call

 [MyCustomAppDelgate appDelegate]