App delegate methods aren't being called in iOS 13

Question

I am using Xcode 11 and building an app for iOS 13. In a new project I created in Xcode some of the UIApplicationDelegate methods were missing so I added them back into the

Answer 1

This thread helped me:

View controller responds to app delegate notifications in iOS 12 but not in iOS 13

Objective C:

if (@available(iOS 13.0, *)) {
    [[NSNotificationCenter defaultCenter] addObserver:self 
          selector:@selector(appWillResignActive:) 
          name:UISceneWillDeactivateNotification object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self 
          selector:@selector(appDidBecomeActive:) 
          name:UISceneDidActivateNotification object:nil];

}
else {
    [[NSNotificationCenter defaultCenter] addObserver:self 
          selector:@selector(appWillResignActive:) 
          name:UIApplicationWillResignActiveNotification object:nil];


    [[NSNotificationCenter defaultCenter]addObserver:self
          selector:@selector(appDidBecomeActive:)
          name:UIApplicationDidBecomeActiveNotification
                                              object:nil];
}