How do I rotate and move mesh in ARKit?

I’ve managed to make a VERY basic app (for iOS) that creates a cube whenever I click the screen using ARKit. However, I now need to be able to rotate and position (even scale perhaps?) the object by the usual pinh/drag controls of the iPhone.

Could anybody give me some pointers as to where to begin with this please?

I’m using UE4.18.3 presently.

I would also like to know that answer to this question.
Currently I’m using two sliders to rotate and scale a model. I’m testing my interactions in a ‘prototyping level’, where everything is working as expected. However, when I launch it on an iOS device the model does not rotate properly. I wonder if this is because ARKit has its own coordinate system and actually rotates the model to account for perspective. That’s just my guess though.
I’ll post an update if I find a solution.