I did follow the steps by the instructions in Sample Projects. Those example works fine in the simulator.
While it run an empty scene since I switched those example projects to iOS platform and run them on my iPhone.
I did add a location usage description for them and it perfectly done well as I build those project into iOS version.
I do not know what I did wrong or what I should do any more.
So I do need a specific instruction how to apply those examples for the maps on an iOS device.