Question

i am currently starting to learn Xcode and objective-c and i am reading three different books on that topic currently. All of these books refer to a file called “AppDelegate” (My_First_ProjectAppDelegate.m, My_First_ProjectAppDelegate.h) which are said to be “created with the Project” (i am creating a “Cocoa Application”). These files are not present when I create a new Project. I seem to be not the only one having this problem (see http://pragprog.com/titles/dscpq/errata ).

Is there any more information about AppDelegate? What is the current practice on how to deal with a missing Appdelegate? i am using Xcode Version 3.1.4 on Mac OSX Leopard.

Answer 1

AppDelegate is nothing more than a common NSObject class with needed connections in MainMenu.xib. You can easily recreate your own:

1. Create a class, name it AppDelegate
2. Open MainMenu.xib and add NSObject object to object palette
3. In object inspector’s Identity tab (the last one) set object’s class to AppDelegate (you should get autocomplete)
4. Ctrl+drag from Application object to your newly created AppDelegate object and choose “delegate” from opened panel.