IOS中didFinishLaunchingWithOptions中的错误-Objective-C应用开发

Question

In my 'didFinishLaunchingWithOptions' function i am giving following line at the end :-

[[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)];
    return [super application:application didFinishLaunchingWithOptions:launchOptions]; 

But it is giving the following warning:-

'NSObject' may not respond to 'application:didFinishLaunchingWithOptions' function 

And when i build it, the application terminates with 'Uncaught Exception error'

Can anybody suggest why this is happening. Thanks

Answer 1

Try

[self application:application didFinishLaunchingWithOptions:launchOptions];

Base objct like NSObject dont implement method of didFinishLaunchingWithOptions:launchOptions

Answer 2

you should return YES at the end of didFinishLaunchingWithOptions:launchOptions

[[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound)];
return YES;