Today we go over how to use DispatchGroup to wait for data with Swift 4. In this tutorial, you will learn how to make a block enter and leave the dispatch group, as well as notify after the last block has left.
The majority of apps make networking requests, and depending on the app, you may need to call multiple apis at the same time. As opposed to chaining your calls in a synchronous manner, which is much slower, you can add them to the dispatch group and call them at the same time to increas