I'm building an iOS app and this is my first experience with maps. The issue is pretty simple: the user can move the map with his/her finger. Each time this happens I download some info from a server (info related to the map region just shown) to display markers. What I want is to avoid reloading and reloading again the same info if the user come back to a previously visited region.
Is there a way to check this?
Maybe an algorithm. I think this is a common issue, but I can't seem to find anything on internet.