[iOS] The operation couldn't be completed. (NSURLErrorDomain error -999.)

[LBCross]

1.The iOS platform reports an error after killing the app and restarting.
2.[didCompleteWithError] When it is detected that the player manually kills the app, it needs to support continued download
[error.userInfo objectForKey:NSURLErrorBackgroundTaskCancelledReasonKey]

[LBCross]

[VincentGogo]

i have same iusse, how to fix it?