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Swiftui

Articles and publications tagged Swiftui across the Atmosphere.

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MacKuba blog
MacKuba blog
Aug 17, 2020
SwiftUI betas - what changed before 1.0
In the last few weeks I’ve been trying to catch up on SwiftUI - watching WWDC videos, reading tutorials. Not the new stuff that was announced 2 months ago though - but the things that people have been using for the past year. Last June, like everyone else I immediately started playing with SwiftUI like a kid with a new box of Legos. In the first month I managed to build a sample Mac app for switching dark mode in apps. However, after that I got busy with some other things, and never really got back to SwiftUI until recently, so by the time the “version 2” was announced at the online-only WWDC, I’ve already forgotten most of it. So in order to not get this all mixed up, I decided to first remember everything about the existing version, before I look at the new stuff. Back then, when I was watching all the videos and doing the tutorial, I was taking a lot of notes about all the components, modifiers and APIs you can use, every single detail I noticed on a slide. However, I was surprised to see how many of those things I wrote down don’t work anymore. After the first version that most people have played with and that the videos are based on, there were apparently a lot of changes in subsequent betas (especially in betas 3 to 5). Classes and modifiers changing names, initializers taking different parameters, some things redesigned completely. And the problem is that all those old APIs are still there in the WWDC videos from last year. But WWDC videos are usually a very good source of knowledge, people come back to them years later looking for information that can’t be found in the docs, Apple even often references videos from previous years in new videos, because they naturally can’t repeat all information every year. This was bothering me enough that I decided to spend some time collecting all the major changes in the APIs that were presented in June 2019, but were changed later in one place. If you’re reading this in 2021 or 2022 (hopefully that damn pandemic is over!), watching the first SwiftUI videos and wondering why things don’t work when typed into Xcode - this is for you. Here’s a list of what was changed between the beta 1 from June 2019 and the final version from September (includes only things that were mentioned in videos or tutorials): NavigationButton Appeared in: “Building Lists and Navigation” tutorial, “Platforms State of the Union” ForEach(store.trails) { trail in NavigationButton(destination: TrailDetailView(trail)) { TrailCell(trail) } } Replaced with: NavigationLink ForEach(store.trails) { trail in NavigationLink(destination: TrailDetailView(trail)) { TrailCell(trail) } } PresentationButton / PresentationLink Appeared in: “Composing Complex Interfaces” tutorial, “Platforms State of the Union” .navigationBarItems(trailing: PresentationButton( Image(systemName: "person.crop.circle"), destination: ProfileScreen() ) ) Replaced with: PresentationLink, which was lat…
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