Any tips for mobile touch implementation?

Hi, I’m just about to start implementing touch input for my project.
I’ve downloaded the Match 3 sample project and had a good look over as well as watched a fair few tutorials online.

Basically I’m trying to set up so my camera rotates around and origin point while I move my finger left or right on the screen. I’ve done it and it works well but I was wondering if there was any more updated information regarding touch input?

Sometimes feels like I’m sort of ‘hacking’ things together as the controller and keyboard tools seem more flaleshed out.