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I am downloading hundreds of files with NSURLSessionConfiguration. I am updating a progress label for each downloaded file, from method 

 -(void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location.

Suddenly it stopped updating progress label. I have tried performSelectorOnMainThread,dispatch_async(dispatch_get_main_queue() but to no avail.

What could be wrong? How can I update UI from didFinishDownloadingToURL method?

Any help would be appreciated. Thanks

Fahim
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Devesh
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1 Answers1

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Does it run on main thread?

The most reliable solution for UIView is

[View performSelectorOnMainThread:@selector(Update:) withObject: ProgressObj waitUntilDone:FALSE];

It will guarantee that the UI update is being executed on correct thread. If you are using Core Graphics - keep Context pointer as your class variable. However, I prefer CALayer object for such kind manipulations

ETech
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