self.window.rootViewController vs window addSubview

Question

I\'ve noticed a lot of examples for iPhone apps in the Application Delegate

- (void)applicationDidFinishLaunching:(UIApplication *)application

h

Answer 1

The crash is because you're calling a method that doesn't exist, not because your variables are not initialized.

-setRootViewController doesn't exist prior to iOS 4.0. Use

[self.window addSubview:self.tabBarController.view]; instead.

Or, update your target platfor to 4.0.2 or later. It's probably less than 5% of users that aren't using iOS 4 at this point.