Additionally, see that the body of the structure is of type Scene, another protocol that according to documentation it acts as a container for the view hierarchy that will be displayed to the user. Notice in the screenshot above that MyProjectApp structure is marked with attribute to indicate that this is the entry point of the app, and it’s no possible to have more than one structure marked like that. That structure is actual the base where the rest of the UI will sit upon when building pure SwiftUI based projects. The entry point of an app now is a structure that adopts the App framework, a brand new type that according to documentation “it represents the structure and behavior of an app”. Both AppDelegate.swift and SceneDelegate.swift files are missing, and in place of them there’s a file titled as the project suffixed by the “App” word. SwiftUI App Life CycleĬreating a new SwiftUI project brings a new addition to the initial configuration: The Life Cycle popup menu.īy choosing the SwiftUI App option there is no more AppDelegate or SceneDelegate in the project to handle the application life cycle and its various states, such as when the app is about to start, enter the foreground, background, etc. To create a new Playground, you can now open the File > New > Playground… menu. The first thing that you will notice once you run Xcode 12 is that the option to create a Playground is missing from the Welcome window:īesides the options to create a new project and clone from a Git repository, the third option is to open an existing project. I really recommend to go through Xcode release notes and see the full list of what’s new, as well as to read Swift changelog for details left out of this tutorial.Ĭhanges in Xcode 12 are apparent right when Xcode starts. What is covered in the parts to come is just a subset of what really exists, and I tried to pick topics as general as possible so the majority of developers are interested in them. So, here we are, ready to highlight some of the new Xcode 12 features, as well as of Swift 5.3. Once again Swift brings improvements that most of them will be proved useful to all developers. The more the Swift language advances, the more features we all get, resulting to better, safer, clearer and more robust code. Xcode 12 contains the next Swift update bundled, version 5.3. It carries great new features and tools that were definitely missing from previous versions, and all that will definitely help a lot the overall development process. The first beta version of Xcode 12 was made available on day one to developers, so everyone had the chance to download and play around with it early enough. This post is dedicated to the base that makes everything else real Xcode and Swift. As always, lots of new stuff and great advancements were introduced, and once again everybody has got really excited and eager to try many new things out. Virtually, all developers around the globe had the chance for a seat in the front row, being able to learn about all new features and improvements that Apple had to announce this year right at the moment they were becoming available. WWDC 2020 was finished just a few days ago under unprecedented conditions for first time.
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