Could not instantiate class named MKMapView
Click on your project to bring the project settings. Under Targets, click your project, select from the upper toolbar "Build Phases". Under "Link binary With Libraries" tab, you will see the list of frameworks included in your project. Click the "+" button and add MapKit library from the shown list to your project.
I ran into this too, but I was able to get past it by following the instructions of step 2 in your link (thanks, by the way):
- Add the MapKit framework to the project. (Control + Click Frameworks folder -> Add -> Existing Frameworks)
I just searched for MapKit.framework, added it to the project, and the error went away.
I haven't added any map code yet (although I do have a MapViewDelegate connected in IB), but it's working fine so far!