AFHTTPSessionManager发布videoswift

我正在尝试使用AFNetworking> AFHTTPSessionManager Post方法在后台上传video。 即使应用程序被暂停，我也希望它能够上传。 但是我在执行此代码时遇到错误，它没有记录任何错误，并且在代码中指向无处。 我尝试了其他post中有关我的方案的所有解决方案，但无法使其正常工作。 Plesae检查下面的代码，并建议我解决方案或链接我在某处使其工作

{ let urlString = BaseUrl + WebLinks.post let appId = NSBundle.mainBundle().bundleIdentifier let config = NSURLSessionConfiguration.backgroundSessionConfigurationWithIdentifier(appId!)// crashes with it //let config = NSURLSessionConfiguration.defaultSessionConfiguration()//doesnt work in background config.allowsCellularAccess = true config.timeoutIntervalForRequest = NSTimeInterval(999) config.timeoutIntervalForResource = NSTimeInterval(999) let manager = AFHTTPSessionManager(baseURL: NSURL(string: urlString), sessionConfiguration: config) manager.responseSerializer.acceptableContentTypes = NSSet(object: "application/json") as Set manager.requestSerializer.setValue(PersistenceManager.sharedInstance.accessToken, forHTTPHeaderField: "Authorization") let param = [ "subject":subject, ] print(urlString) manager.POST(urlString, parameters: param, constructingBodyWithBlock: { (formData) -> Void in if var imageToUpload = image { imageToUpload = imageToUpload.resizeImage(1200) let imageData = UIImageJPEGRepresentation(imageToUpload, 0.9); formData.appendPartWithFileData(imageData, name: "post_image", fileName: "picture.jpg", mimeType: "image/jpeg") } if let videoUrl = video { //let videoData = NSData(contentsOfURL: videoUrl) //formData.appendPartWithFileData(videoData, name: "post_video", fileName: "video.mp4", mimeType: "video/quicktime") do{ try formData.appendPartWithFileURL(videoUrl, name: "post_video", fileName: "video.mp4", mimeType: "video/quicktime") }catch{ print("Failed to attach video") } } }, success: { (nsURLSessionDataTask, response) -> Void in print (response) }) { (nsURLSessionDataTask, error) -> Void in print (error.localizedDescription) } }