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iosnsurlconnectionnsurlsessionnsurlrequest

NSURLSession's dataTaskWithRequest: returns nil

I've got a really strange error. I have the following line in code:

NSURLSessionDataTask *task = [self.session dataTaskWithRequest:request];

after execution of which the task is nil! This case is not documented anywhere and I couldn't find any similar cases on the web. The session is not nil.

This happens only when I press home to leave the app, come back and do something that sends a request. iOS Simulator 8.3

Solution

  • This is the bug in iOS, sometimes it just returns nil. Workaround for this is to keep calling this method for several times, just like AFNetworking does for uploadTaskWithRequest: method.