How to do something before applicationDidFinishLaunching

Apple allow us to define our own Logo image from simulator launch to execute applicationDidFinishLaunching end. Now I want to do something between Logo on screen to IPHONE display the first view. I don't know how to do this. Thanks everybo开发者_运维知识库dy who help me

In your AppDelegate class, just insert the code you want before [window makeKeyAndVisible]; in the applicationDidFinishLaunching: method.