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What is the current state of writing asynchronous code in Swift 4?. The current mostly used pattern is to provide a callback closure that will be invoked when the task complete passing the result or an error. While this pattern works, it can be very hard to maintain and understand when we need to write multiple asynchronous tasks that also depends on the result of previous task.
Asynchronous tasks like fetching data from network, parsing, processing, and saving data to local cache are routine tasks apps nowaday perform. In this article we are going to build an asynchronous Operation Subclass that fetch repositories from GitHub API asynchronously, and a dependent Operation subclass that parse and serialize the fetch repository data into Swift Class.
Asynchronous tasks like fetching data from network, parsing, processing, and saving data to local cache are routine tasks apps nowaday perform. In this article we are going to build an asynchronous Operation Subclass that fetch repositories from GitHub API asynchronously, and a dependent Operation subclass that parse and serialize the fetch repository data into Swift Class.