An identifier uniquely identifying the task within a given session.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.0+
- watchOS 2.0+
This value is unique only within the context of a single session; tasks in other sessions may have the same
Obtaining General Task Information
The URL request object currently being handled by the task.
The original request object passed when the task was created.
The server’s response to the currently active request.
An error object that indicates why the task failed.