A new collapse delegate was added in Xcode 12 and iOS 14. Unfortunately the Master-Detail template was removed so there has never been a good example of how to use it to maintain the behavior of the previous template which Read more…
Discovered this strange error in Swift, when using the sample code from the proposal which is supposed to have been accepted and implemented
I needed to show an alert in an async context and this is how I achieved it: The idea to throw a cancellation exception was inspired by DDDevicePickerViewController which is the only built-in async UIViewController I’m aware of.
I wondered why NSPersistentStoreRemoteChange doesn’t contain any info about what process made the change. For example it isn’t possible to know if the change even was made by the current process or not. This would be useful so when you Read more…
I came across this interesting Stack Overflow question How can I make a simple circular button in SwiftUI in macOS? It’s interesting because all of the proposed solutions required hard-coding a frame size. I decided to experiment with how to Read more…
First visit the Apple Events web page and find the link to the stream you want to download, e.g. the link for the iPhone 14 event from September 2022 looks like this: Now you need to install the yt-dlp command Read more…
Update 10/4/2024: It appears in Xcode 15.3 nothing special is required and can use await right next to the hello world print. TLDR: add @main and rename main.swift To create a command line tool in Xcode 14.3 that uses async/await Read more…
Learning SwiftUI can be tricky because it has a very different design to previous UI frameworks. Many make the mistake of trying to apply old design patterns which are not really compatible because of SwiftUI’s use of value semantics and Read more…
Seems to me some developers think that @MainActor means “always main thread” and has the same behaviour as DispatchQueue.main.async which I don’t think is try. For example, the code below outputs: Because the Database class is not marked as @MainActor Read more…
I came across an interesting Stack Overflow question about how to support List selection of different types when using NavigationSplitView when in regular width, e.g. on iPad landscape. This problem doesn’t arise with NavigationStackView because multiple ForEach can simply iterate Read more…
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