Converting a completion block function to async await

It's clear that async await is the way that Apple wants us to develop concurrent code in Swift. But what if a framework we have to use (or even our legacy code) still has a completion block-based interface? Swift 5.5 provides a simple way to convert these APIs to async await functions.

In this recipe, we'll use an old framework where one of its functions has a completion block API. We'll convert it to an async await function and we'll use it in a SwiftUI view.

The package we will use is called Lorikeet, implemented by Þorvaldur Rúnarsson (https://github.com/valdirunars). Lorikeet is an aesthetic color scheme generator. Starting with one color, it generates a series of other colors that can be used for creating a color theme for an app.

Getting ready

Create an iOS 15 SwiftUI app called PaletteGenerator.

Import the SPM package from the following address-

Figure 11...