Informs the delegate that a prior loading request has been cancelled.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
The resource loader.
The loading request that has been cancelled.
Previously issued loading requests can be cancelled when data from the resource is no longer required or when a loading request is superseded by new requests for data from the same resource.
For example, if to complete a seek operation it becomes necessary to load a range of bytes that's different from a range previously requested, the prior request may be cancelled while the delegate is still handling it.