Have you checked the doc of CFNotificationCenterGetDarwinNotifyCenter? Discussion ... As with distributed notifications, the main thread's run loop must be running in one of the common modes (usually kCFRunLoopDefaultMode) for Darwin-style notifications to be delivered. Please try adding CFRunLoopRun(); at the end of your code: int main(int argc, const char * argv[]) { // Add Observer CFNotificationCenterAddObserver( CFNotificationCenterGetDarwinNotifyCenter(), //center NULL, //observer myCallback, //callback CFSTR("sanity_check"), //event name NULL, //object CFNotificationSuspensionBehaviorDeliverImmediately ); // Post notification 1 CFNotificationCenterPostNotification( CFNotificationCenterGetDarwinNotifyCenter(), // center CFSTR("sanity_check"), // event name NULL, //object NULL, //userinfo dictionary true ); // Post notification 2 notify_post("sanity_check"); CFRunLoopRun(); //<- return 0; }

You can write it a little more compact: $variable0 .combineLatest($variable1, $variable2, $variable3) .combineLatest($variable4, $variable5) .sink { completion in } receiveValue: { (tuple, v4 ,v5) in let (v0, v1, v2, v3) = tuple }.store(in: &cancellables)

Searching with "apple old macos", I can find this article. How to get old versions of macOS (Part of Apple Support pages.) Better read the instructions in it carefully and follow the link in the part Use Safari to download macOS on your Mac

Option and Selected are different types. How can you judge if an Option exist in the selected Array? Compare userCode? Compare optType? Compare optValue? Or some other way?

It is not clear enough, but you can prepare some extension like this: extension Selected { func matches(_ option: Option) -> Bool { //↓Modify the following expression to fit for your purpose return optType == option.optType && optValue == option.optValue } } And then: Button("Options Not Selected") { let optionsNotSelected = options.filter { option in !selected.contains {$0.matches(option)} } print(optionsNotSelected) //Use `optionsNotSelected`... }

Can you show a complete code to reproduce the issue?

In UIKit, UITextInput is just a protocol and is not a UI component to put into some container. Are you confused with something else?

An interesting behavior. When I tested your code on my iPhone 7 Plus (iOS 14.8.1), the links were not shown. Also tried embedding in VStack & HStack I usually use ZStack when I want some hidden NavigationLinks. NavigationView { ZStack { NavigationLink(destination: SettingsView(), tag: "Settings", selection: $selection) { EmptyView() } NavigationLink(destination: AppInfoView(), tag: "Info", selection: $selection) { EmptyView() } VStack{ GameUIView() HStack{ //... } } } } .navigationViewStyle(StackNavigationViewStyle()) //...

In your code (when you show your code, please show all the code as text), Welcoming is an App, not a View. To use setLiveView, the target needs to be a View. And there's no support showing App or Scene as live in PlaygroundPage of the current (3.4.1) Swift Playgrounds. (Swift Playgrounds 4 is expected to come late this year.) You may need to create a view to use setLiveView. struct ContentView: View { var body: some View { TabView { Text("one") Text("tow") } } } PlaygroundPage.current.setLiveView(ContentView())

You just need to add a new SpriteKit Scene file in your project. (sks stands for SpriteKit Scene, I think.)

It is not clear enough, but you may need to visit the Agreements, Tax, and Banking page of App Store Connect. (Not the Account page of the developer site, which was shown in some notifications in case of me.)

This is not a place to request an invitation code of some specific app. Contact to the author of the app.

Can you show the details of pruneTableP2? Especially its type?

In most of the APIs imported into Swift, bit position based flags such as UICollectionViewScrollPositionCenteredHorizontally is not Int. So, bitwise operator like | would not be applicable. UICollectionViewScrollPosition flags seems to be wrapped into a struct called UICollectionView.ScrollPosition which conforms to OptionSet protocol. When you use OptionSet constants, you need to write them in Set-like notations. Please try something like this:         theCollection.scrollToItem(at: thePath, at: [.centeredVertically,.centeredHorizontally] , animated: true)

You may need to contact to the author of the app.