NSURLSessionTask never calls back after timeout when using background configuration

Question

I am using NSURLSessionDownloadTask with background sessions to achieve all my REST requests. This way I can use the same code without have to think about my applic

Answer 1

There is one method in UIApplicationDelegate,which will let you know about background process.

-(void)application:(UIApplication *)application handleEventsForBackgroundURLSession:(NSString *)identifier completionHandler:(void (^)())completionHandler

If there are more than one session ,you can identify your session by

if ([identifier isEqualToString:@"com.mydomain.myapp.mySessionIdentifier"]) 

One more method is used to periodically notify about the progress .Here you can check the state of NSURLSession

- (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite


NSURLSessionTaskStateRunning = 0,                   
NSURLSessionTaskStateSuspended = 1,
NSURLSessionTaskStateCanceling = 2,                   
NSURLSessionTaskStateCompleted = 3,