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https://issues.apache.org/jira/browse/CB-9936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16167945#comment-16167945
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Evan Wieland commented on CB-9936:
----------------------------------
I can confirm that this work-around does the trick.
> iOS File Transfer not receiving Progress Event
> ----------------------------------------------
>
> Key: CB-9936
> URL: https://issues.apache.org/jira/browse/CB-9936
> Project: Apache Cordova
> Issue Type: Bug
> Components: cordova-plugin-file-transfer
> Affects Versions: 1.4.0
> Environment: iOS
> Reporter: Tony Leung
> Priority: Minor
> Labels: cannot-reproduce, triaged
> Attachments: screenshot.png
>
>
> In CDVFileTransfer.m, download() method between line 447 to 462
> {noformat}
> delegate.connection = [[NSURLConnection alloc] initWithRequest:req
> delegate:delegate startImmediately:NO];
> if (self.queue == nil) {
> self.queue = [[NSOperationQueue alloc] init];
> }
> [delegate.connection setDelegateQueue:self.queue];
> @synchronized (activeTransfers) {
> activeTransfers[delegate.objectId] = delegate;
> }
> // Downloads can take time
> // sending this to a new thread calling the download_async method
> dispatch_async(
> dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,
> (unsigned long)NULL),
> ^(void) { [delegate.connection start];}
> );
> {noformat}
> If I replaced it with the older version of the code, then it works.
> {noformat}
> delegate.connection = [NSURLConnection connectionWithRequest:req
> delegate:delegate];
> if (activeTransfers == nil) {
> activeTransfers = [[NSMutableDictionary alloc] init];
> }
> [activeTransfers setObject:delegate forKey:delegate.objectId];
> {noformat}
> In summary, if we don't use GCD to start the NSURLConnection, it works.
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