This adds a ref count to guard against calling activate after it has already been called. This can happen when a layer is added during certain map lifecycle methods like MapChangeWillStartRenderingFrame that also triggers activation. This also protects against issues related to a deactivation of the context happening in an inner scope while an outer scope is still expecting to be able to use the context.
Mapbox iOS SDK
A library based on Mapbox GL Native for embedding interactive map views with scalable, customizable vector maps into Cocoa Touch applications on iOS 7.0 and above using Objective-C, Swift, or Interface Builder.
This repository is for day-to-day development of the SDK. Building the SDK yourself requires a number of dependencies and steps that are unnecessary for developing production applications. For production applications, please consider installing an official, prebuilt release instead; see the Mapbox iOS SDK website for installation instructions.
