A practical guide to building scalable map interfaces that render thousands of polygons without overwhelming your backend. Learn progressive rendering, smart caching strategies, and production techniques used by Google Maps, Uber, and Airbnb—from quick wins to architectural patterns like vector tiles and spatial indexing.
DispatchGroup in Swift offers a simple solution for synchronizing multiple unrelated asynchronous operations. It allows tracking the completion of various tasks, even on different queues, without complex setups. This approach avoids messy and non-scalable code, making it ideal for handling multiple asynchronous tasks efficiently.
Note — This article is now outdated. There’s a new article with updated info here. When working on a project not too long ago, My teammate and I came across the following situation. We started developing the project on Swift 2.0 and moved over to 2.1 with the released of Xcode 7.1. We used a class conforming to the NSCoding protocol to store the basic information about the app’s user....