In my last foray into the area, I demonstrated display and interactive picking by implementing a room polygon and furniture picker in SVG.
It enables picking and identifying objects and proves that the same code and interaction is supported on all mobile devices, in particular both Android and Safari on iOS.
If you would like to circumvent all explanations and just jump straight into the final result, take a look at The Building Coder SVG folder, or access the step-by-step evolution of the demo directly from here:
You can test each step interactively, then see how it works by viewing the source.
I hope you find this useful. Have fun, and good luck!