Unable to download data in Background after 10 minutes?

Question

I am working with the app in which i want to download data in background. As per Apple multitasking guidelines, you are allowed to download data for 10 minutes.

In my case, it will take more than 10 minutes for downloading file and downloading get failed.

Initial downloading request is from DownloadViewController as below.

- (IBAction)performLargeUpload:(id)sender {

[request cancel];
[self setRequest:[ASIFormDataRequest requestWithURL:[NSURL URLWithString:@"http://mirrorblender.top-ix.org/peach/bigbuckbunny_movies/big_buck_bunny_480p_stereo.avi"]]];  // 149MB

[request setDownloadDestinationPath:[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"big_buck_bunny_480p_stereo.avi"]];

[request setTimeOutSeconds:20];
[request setDownloadProgressDelegate:progressIndicator];
[request setUserInfo:[NSDictionary dictionaryWithObject:@"request1" forKey:@"name"]];

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
[request setShouldContinueWhenAppEntersBackground:YES];
#endif
[request setDelegate:self];
[request setDidFailSelector:@selector(uploadFailed:)];
[request setDidFinishSelector:@selector(uploadFinished:)];
[request setAllowResumeForFileDownloads:YES];

[request startAsynchronous];
[resultView setText:@"Downloading data..."];

}

In appDelegate, i have put this code When applicationDidEnterBackground

- (void)applicationDidEnterBackground:(UIApplication *)application  {

UIApplication  *app = [UIApplication sharedApplication];
UIBackgroundTaskIdentifier bgTask;

bgTask = [app beginBackgroundTaskWithExpirationHandler:^{
    [app endBackgroundTask:bgTask];

}];

backgroundTimer=nil;
backgroundTimer = [NSTimer scheduledTimerWithTimeInterval:10 target:self  selector:@selector(keepAlive) userInfo:nil repeats:YES];
}

How to extend the time for background downloading??

You can't extend the time. You should think about some possibility to resume the download or compress the data etc. — tamasgal, May 10 '13 at 06:44
possible duplicate of [Download large files which takes more than 10 min when iPad device is locked](http://stackoverflow.com/questions/9411122/download-large-files-which-takes-more-than-10-min-when-ipad-device-is-locked) — Prof. Falken, May 10 '13 at 06:48
But when the endBackgroundTask is called or after 10 min in background, we can pause the download, and in keepAlive method we can resume the downloading, so we can get another 10 minutes. Right?? — Apple, May 10 '13 at 06:57

score 1 · Answer 1 · answered May 10 '13 at 07:16

1

You can't do it. Stop trying.

answered May 10 '13 at 07:16

borrrden

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Could you please Elaborate. – Prahalad Gaggar May 10 '13 at 07:42
No, this question has been asked to death. – borrrden May 10 '13 at 07:45
It was marked as very low Quality. And i think it should be commented, though i skip this. – Prahalad Gaggar May 10 '13 at 07:47
Not true, if you are writing a magazine or newspaper style application, you can use Newsstand kit to download whatever you want even if your application is not active. – MrTJ May 10 '13 at 07:55
@MrTJ This app is not a newsstand app. Newsstand apps are on the list of approved background apps. – borrrden May 10 '13 at 08:24

score 0 · Answer 2 · edited May 23 '17 at 10:32

0

Yes this can't be done, I'll suggest when application goes background if any download connection exists better to cancel it & start the download again when application comes foreground. Other possibility we need to maintain a pause & resume, This required some server changes also.

This may helpful:

How to pause/resume downloads in iPhone (iOS)

edited May 23 '17 at 10:32

Community

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answered May 10 '13 at 07:26

ram.Iphone

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4

score 0 · Answer 3 · answered May 10 '13 at 07:54

0

It is possible to download assets when your application is not active only and only if your app has periodically updated content like magazines and newspapers. In this case you can use the Newsstand framework.

answered May 10 '13 at 07:54

MrTJ

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But, I think for periodically updated content, we must use the Newsstand framework, but what about the application without newsstand?? But i want to download periodically updated content without using Newsstand framework in the background. – Apple May 10 '13 at 08:07
Finally, with ASIHTTP you can download the content in background more than 10 minutes. It works for me – Apple May 10 '13 at 10:59

Unable to download data in Background after 10 minutes?

3 Answers3