How to change UIApplicationDelegate listener?

Question

Objective-C

I want to make sure that an instance of my class receives UIApplicationDelegate calls. Created a class:

@interface MyClass : NSObject <UIApplicationDelegate> {
...
}

And I'm trying to change the delegate:

MyClass *myClass = [[MyClass alloc] init];
[[UIApplication sharedApplication] setDelegate:myClass];

This is where the app crashes. What am I doing wrong?
Thank you.

Answer 1

there are two ways:
one: you already have the required class, usually called AppDelegate
two: notifications