How to add interstitial admob ads to my ios project [closed]

I want to add interstitial admob ads to my iPhone and iPad project, is there any working sample or tutorial?

Edit: I've successfully added it to my project, but if I don't have any internet connection the app stuck in the loading image, what should I do?

Please do not provide Android links... We are talking about iOS.

Thank you!

Where do interstitial ads go?

Interstitial Ad Unit They should be placed in between natural breaks in the experience of your app. For example, interstitial ads should be shown between levels or stages for gaming apps and are not permitted on placements such as app load, exit pages or in the middle of game play.

If you are using the Google Mobile Ad SDK, Google provides an excellent guide here.

If you prefer example projects, Google supplies one here (currently called InterstitialExample_iOS_2.6.zip).