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2.5.1 The organization of start-up code

The way we have organized the start-up of our application is as follows:
- (void) applicationWillFinishLaunching: (NSNotification *)not;
contains code for the initialization process of the application. This usually means creating the application's main objects; in our case, the menu and the only application's window. You can't (and shouldn't) display any window in this method.

Instead, the method

- (void) applicationDidFinishLaunching: (NSNotification *)not;
contains a sequence of user-visible actions to be taken just after the application became active: typically, popping up a window or a panel to the user.

It should be mentioned that this is not the only possible way of organizing the start-up of an application.