Creating a card game with turning cards and everything needed is shown in length in the free cs193p video series from stanford university. Unfortunately I can't link it here, but a search for „cs193p“ in google gives the correct result.

You have to define a main function marked with the @main attribute containing your Task. Playgrounds are special in a way that they run all top level code automatically, normal swift programs don't do that.

Yesterday Apple updated its iPadOS 15 web page: For „Universal Control“ they added a badge saying that it was delayed to spring 2022. For Swift Playgrounds they removed a footnote stating it would come „late 2021“. So there is still hope we will see it before the holidays. My children and I are also waiting for it to be released and would be very disappointed if it was delayed even more. Come on Apple, you can do it!

The swift compiler's error message is misleading, but what happens if you write presentationMode instead of presentatoinMode ?

let bundle = Bundle(for: TheNameOfYourXCTestCaseSubClass.self) Using the class name of your XCTestCase-derived class the above code gives you the corresponding Bundle. Afterwards use the methods on Bundle to access the specific file.