iOS Google Maps: Set Camera to show all Markers
The intend is to set the boundaries of the map to focus on all the markers. The ‘GMSMapView‘ class used to have a method ‘markers‘ which returned all the markers, but its now deprecated. So, you will have to keep track of the markers added to the map. Assuming that you have the following: GMSMapView
iPhone(iOS) programming: Get Google Contacts
This tutorial walks you through on how to retrieve google contacts programatically.