How to subclass UIApplication?

Question

The iPhone Reference Libary - UIApplication says I can subclass UIApplication, but if I try this I will get an exception:

*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'There can only be one UIApplication instance.'

This reminds me of the Highlander "There can be only one,. :-)

Do I have to pass other argurments to UIApplicationMain? Or did I missread somthing in the libary?

Answer 1

Did you pass the name of your subclass to UIApplicationMain? Let's assume you have

@interface MyUIApp : UIApplication 
...

then in main() you should do:

NSString* appClass = @"MyUIApp";
NSString* delegateClass = nil;
int retVal = UIApplicationMain(argc, argv, appClass, delegateClass);