iAd works on simulator but not on device

Question

I am updating an app with iAd. The current version has iAd, and everything works great. But the changes have been substantial enough that I want to test the ads again before I submit the update.

When I test iAd on the simulator, I get the test advertisement with no problem. When I try to test it on the device, all I get are calls to didFailToReceiveAdWithError. The descriptions of the error are either:

"The operation couldn't be completed. Ad inventory unavailable."

or:

"The operation couldn't be completed. Unknown error."

In light of this, how can I make sure the ads will work in the updated app?

Answer 1

Make sure you have set the ADBannerView delegate.