Do I really need a MainWindow.xib file?

I have an iPad 4.3 proj开发者_如何学Goect that doesn't have a MainWindow.xib because it's main view is created programmatically. Everything seems to work fine but I noticed that in my plist file there's a value for a NSMainNibFile key that has "MainWindow" for value. If I change in any way that entry, my app won't work. Now, that's strange, at least for me...

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If you remove the xib reference in the target properties, be sure to change your code in main.m to refer to your class delegate class.

int retVal = UIApplicationMain(argc, argv, nil, @"YourAppDelegateClassName");

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If you remove the NSMainNibFile key from your Info.plist, you need to update the code for main.m. You will need to update the NSString *delegateClassName in the call to UIApplicationMain.

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No you don't necessarily need something called MainWindow.xib you could rename everywhere but as this answer points out you have to have something for the application to start with; What's the MainWindow.xib nib file for?