additionalRequestHeaders(for:completionHandler:)

Declaration

optional func additionalRequestHeaders(for url: URL, completionHandler: @escaping  @Sendable ([String : String]?) -> Void)

optional func additionalRequestHeaders(for url: URL) async -> [String : String]?

Discussion

important:

You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:

optional func additionalRequestHeaders(for url: URL) async -> [String : String]?

For information about concurrency and asynchronous code in Swift, see Calling Objective-C APIs Asynchronously.