Sent to determine whether the delegate is able to respond to a protection space’s form of authentication.
- iOS 3.0–8.0Deprecated
- macOS 10.6–10.10Deprecated
- tvOS 3.0–8.0Deprecated
- watchOS 2.0–2.0Deprecated
The connection sending the message.
The protection space that generates an authentication challenge.
This method is called before
connection(_:, allowing the delegate to inspect a protection space before attempting to authenticate against it. By returning
true, the delegate indicates that it can handle the form of authentication, which it does in the subsequent call to
connection(_:. If the delegate returns
false, the system attempts to use the user’s keychain to authenticate. If your delegate does not implement this method and the protection space uses client certificate authentication or server trust authentication, the system behaves as if you returned
false. The system behaves as if you returned
true for all other authentication methods.