Swift News Summaries Week 45 (2023)

Motivation

I’m going to try something as a motivation to read more of the Swift/programming related newsletters I subscribe to.
So I want to post some articles, videos and socials about Swift/Apple/iOS programming I found throughout the week. This may not follow a specific schedule, but I want to try to get one out per week.

Summaries

GitHub - danielsaidi/SwiftUIKit: SwiftUIKit contains additional functionality for SwiftUI.
This package with extensions and UI components for SwiftUI looks interesting.
But there’s no demo application?

Enhancements to ScrollView in iOS 17 - YouTube
HScrollContent seems interesting, although I don’t see a direct use case for it right now. 🤔 Something where the entire scroll view’s content needs to be formatted as one.

SwiftUI Sheet Matched Geometry Effect - Hero Animation - Custom Matched Geometry - iOS 17 - Xcode 15 - YouTube
This might be interesting for [[Jibiki]] if I want to create matched animation for a dedicated Kanji list screen?

Hierarchical background styles in SwiftUI
Nice that we can use them, but I’m not good at design and have no clue when to use secondary or other hierarchical backgrounds… 😅

Building Complex Scroll Animations With New iOS 17 API’s - Xcode 15 - YouTube
Very nice animations. definitely watch this one.

Pagination with SwiftUI List

How to implement pagination with SwiftUI’s List view

List {
    ForEach(viewModel.items, id: \.id) { item in
        ListItemView(item: item)
    }
    if viewModel.isMoreDataAvailable {
        lastRowView
    }
}

var lastRowView: some View {
    ZStack(alignment: .center) {
        switch viewModel.paginationState {
        case .isLoading:
            ProgressView()
        case .idle:
            EmptyView()
        case .error(let error):
            ErrorView(error)
        }
    }
    .frame(height: 50)
    .onAppear {
        viewModel.loadMoreItems()
    }
}

AppStorage persistable Codable values

Store Codable types in AppStorage | Daniel Saidi
Interesting usage of RawRepresentable (iOS 15+) to make types that implement Codable automatically persist-able via AppStorage property wrapper.

Prepare for Swift 6

Swift 6: Preparing your Xcode projects for the future - SwiftLee

• async/await
• existentials
• other warnings (implicit imports?)

Opaque generic arg instead of generic type constraint

Vincent Pradeilles on X: “Looking for a quick tip to improve your Swift code? 🤨 Since Swift 5.7 functions can declare opaque generic arguments by using the keyword `some`! This new syntax offers a simpler alternative to the good old generic constraint 👌 https://t.co/8WY1blWnMs” / X

func fu(bar: some Identifiable) {}
// instead of
func fu<T: Identifiable>(bar: T) {}

But there’s some caveats, for example

• debugging is currently buggy with the opaque type version
• where clause constraints are not possible

Paywall cancellation survey

from twitter