How to use Unity for playback of a simulation within IOS

Hi, I'm new to Unity and my question is how do I keep the user interface and model data of objects (like a sphere with a radius, x, y and z position) in Objective C and use Unity for displaying the movement of objects (also calculated in objective C) while keeping the ability to rotate zoom etc during simulation playback. Thus objective C steers where what objects are within Unity. The idea is that the simulation is being displayed within a viewController created in Xcode. Furthermore, what do I need from Unity or third parties besides being an IOS developer?