init(url:callback:completionHandler:)
Creates a web authentication session instance that uses a callback to evaluate a redirection URL.
Declaration
init(url URL: URL, callback: ASWebAuthenticationSession.Callback, completionHandler: @escaping ASWebAuthenticationSession.CompletionHandler)Parameters
- URL:
The initial URL pointing to the authentication webpage. This initializer only supports URLs with
http://orhttps://schemes. - callback:
An object that describes when the session calls its completion handler.
- completionHandler:
A completion handler that the system calls when the session completes successfully, or when the person using the app cancels the request.
Discussion
The following example creates a session that requires a callback with a custom URL scheme, using the customScheme(_:) type method to create the callback parameter:
let session = ASWebAuthenticationSession(
url: URL(string: "https://example.com/oauth/login/authorize")!,
callback: .customScheme("myappscheme")
) { callbackURL, error in
// Handle the session result.
}