Question

You can see the error in the image.

I don’t even know what these errors mean, it was working fine before I updated Xcode for the iOS 6 update. I’ve done a few things to try and fix it such as change the target OS and do a Clean, but that has not worked.

I get the error after the app successfully is built and pushed to the device.

Answer 1

Your application crashed at runtime, because there was an exception.

The exception is written in your console log. We can see it in your capture:

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIApplication 0x...> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key view.'

This means that somewhere in your application, you tried to set the “view” property of an object of type UIApplication, but UIApplication does not have any view property, so this crashes.

This is very likely that in your MainWindow.xib file, you connected a view IBOutlet to an object of type UIApplication, but this binding of your outlet is invalid because the outlet does not exist anymore.

(maybe you added the outlet at a given time, and binded/connected it in IB, and then removed it in your code, or maybe you binded the IBOutlet then changed the class of your object so the new class does not have the same outlets at all, whatever the outlet is now binded to a non-existant property in your XIB and that generates the crash)

To fix this, open your XIB file in interface builder and remove this invalid connection to your now non-existant outlet, and your exception should go away.