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PONSOperation, observer and thread error
 

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    <p>I've got a problem with <code>NSOperation</code> and observer.</p> <p>I've a <code>tabbarcontroller</code> and a <code>splashController</code>. I want the splashscreen load and download the file and when the file is downloaded make the <code>tabbarcontroller</code> appear to the screen.</p> <p>The problem is that i 've an error :</p> <blockquote> <p>bool _WebTryThreadLock(bool), 0x3d2fa90: Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now...</p> </blockquote> <p>This is my code :</p> <pre><code>- (void)applicationDidFinishLaunching:(UIApplication *)application { queue = [[NSOperationQueue alloc] init]; NSString *path = [NSString stringWithFormat:@"%@flux.xml",DOCPATH]; //Le fichier existe dans le repertoire des documents if([[NSFileManager defaultManager] fileExistsAtPath:path]) [window addSubview:tabBarController.view]; else { splash = [[SplashController alloc] init]; [window addSubview:splash.view]; } DataLoadOperation *operation = [[DataLoadOperation alloc] initWithURL:[NSURL URLWithString:@"http://sly.33.free.fr/flux.xml"]]; [self.queue addOperation:operation]; [operation addObserver:self forKeyPath:@"isFinished" options:NSKeyValueObservingOptionNew context:nil]; } -(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context { [window addSubview:tabBarController.view]; [window makeKeyAndVisible]; NSLog(@"fini"); } </code></pre> <p>Could anyone help me ?</p>
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