How to avoid "CoreAnimation warning deleted thread with uncommitted CATransaction" if NOT using CoreAnimation

Question

Just in the appdelegates, applicationDidBecomeActive. I create and start a thread, this thread waits an asynchronous download and then save data:

 - (void)applicationDidBecomeActive:(UIApplication *)application
    {
              // begins Asynchronous download data (1 second):
               [wsDataComponents updatePreparedData:NO];

               NSThread* downloadThread = [[NSThread alloc] 
                  initWithTarget:self 
                        selector: @selector (waitingFirstConnection) 
                          object:nil];
               [downloadThread start];
        }

then

-(void)waitingFirstConnection{    

    while (waitingFirstDownload) {
      // Do nothing ...  Waiting a asynchronous download, Observers tell me when
      // finish first donwload
    }

    // begins Synchronous download, and save data (20 secons)
    [wsDataComponents updatePreparedData:YES];

    // Maybe is this the problem ?? I change a label in main view controller 
    [menuViewController.labelBadgeVideo setText:@"123 videos"];

    // Nothig else, finish and this thread is destroyed
}

In the Organizer console, when finished, I am getting this warning:

CoreAnimation: warning, deleted thread with uncommitted CATransaction;

Answer 1

Another way of ensuring any UI drawing occurs on the main thread, as described by Andrew, is using the method performSelectorOnMainThread:withObject:waitUntilDone: or alternatively performSelectorOnMainThread:withObject:waitUntilDone:modes:

- (void) someMethod
{
    […]

    // Perform all drawing/UI updates on the main thread.
    [self performSelectorOnMainThread:@selector(myCustomDrawing:)
                           withObject:myCustomData
                        waitUntilDone:YES];

    […]
}

- (void) myCustomDrawing:(id)myCustomData
{
    // Perform any drawing/UI updates here.
}

For a related post on the difference between dispatch_async() and performSelectorOnMainThread:withObjects:waitUntilDone: see Whats the difference between performSelectorOnMainThread and dispatch_async on main queue?