Requests credentials from the delegate in response to a session-level authentication request from the remote server.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.0+
- watchOS 2.0+
The session containing the task that requested authentication.
An object that contains the request for authentication.
A handler that your delegate method must call. This completion handler takes the following parameters::
disposition—One of several constants that describes how the challenge should be handled.
credential—The credential that should be used for authentication if disposition is
Auth Challenge Use Credential
This method is called in two situations:
When a remote server asks for client certificates or Windows NT LAN Manager (NTLM) authentication, to allow your app to provide appropriate credentials
When a session first establishes a connection to a remote server that uses SSL or TLS, to allow your app to verify the server’s certificate chain
If you do not implement this method, the session calls its delegate’s
URLSession: method instead.