Issues implementing ASWebAuthenticationPresentationContextProviding with Xcode 14

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Created Sep ’22

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Trying to implement a type that conforms to ASWebAuthenticationPresentationContextProviding. This is now causing errors with Xcode 14. With the following implementation:

        final class PresentationContextProvider: NSObject, ASWebAuthenticationPresentationContextProviding {

            func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor {

                return ASPresentationAnchor()

            }

        }

I get this compilation error:

Call to main actor-isolated initializer 'init()' in a synchronous nonisolated context

So I can annotate the class or method with @MainActor, but then I get this warning:

Main actor-isolated instance method 'presentationAnchor(for:)' cannot be used to satisfy nonisolated protocol requirement

Is there a way to fix this?

Answered by rolson in 726927022

Nevermind. We had this class embedded in a function. Removing the definition out of that scope solved it.

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Answer 1

rolson OP

Sep ’22

Accepted Answer

Nevermind. We had this class embedded in a function. Removing the definition out of that scope solved it.

0

Answer 2

rolson OP

May ’23

Actually, when building with strict-concurrency=complete and Xcode 14.3 I am seeing these errors again. ASPresentationAnchor() is MainActor, so it seems impossible to implement ASWebAuthenticationPresentationContextProviding and return a ASPresentationAnchor.

2