thank you all for your replies. I was hoping this would be possible so I can continue writing my raspberry project while I'm traveling without the need for a laptop.
Unfortunatly this seems to be not possible right now. When I including the RPi Library there occurs a compile error :-( telling me that there exists no such library
I'm aware that iOS isn't the predistine plattform for developing raspberry pi project but I thought lets give it a try. ;-)