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POLogout using Facebook's official iOS Tutorial
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copied!<p>I'm following Facebook's <a href="http://developers.facebook.com/docs/mobile/ios/build/#logout" rel="nofollow">iOS tutorial for logging out</a>.</p> <p>I added the tutorial's code into my delegate .m file. Ran it and when I clicked on the Logout button, it crashes. I don't know what the error means. The log window shows:</p> <blockquote> <p>[S3DEngine_AppDelegate logoutButtonClicked]: unrecognized selector sent to instance 0xb011dd0</p> </blockquote> <p>I'm using iPhone Simulator 5.0, XCode 4.2. The difference in the tutorial is that I am NOT using <code>applicationDidFinishLauchingWithOptions:</code>. I tried this function too, but it's the same error. </p> <p>Thanks for any help</p> <pre><code>- (void)applicationDidFinishLaunching:(UIApplication *)application { // Facebook // Add the logout button UIButton *logoutButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; logoutButton.frame = CGRectMake(40, 40, 200, 40); [logoutButton setTitle:@"Log Out" forState:UIControlStateNormal]; [logoutButton addTarget:self action:@selector(logoutButtonClicked) forControlEvents:UIControlEventTouchUpInside]; [self.viewController.view addSubview:logoutButton]; // Disable idle timer // [application setIdleTimerDisabled:YES] ; // Configure and start the accelerometer // [[UIAccelerometer sharedAccelerometer] setUpdateInterval:kAccelerometerFrequency] ; [[UIAccelerometer sharedAccelerometer] setDelegate:self] ; // Create the view controller // [window addSubview:viewController.glView]; [window makeKeyAndVisible]; // Configure and start animation // viewController.glView.iAnimationInterval = kAnimationFrequency ; [viewController.glView startAnimation]; // Configure ans start slpash view // CGRect frame = [[UIScreen mainScreen] bounds]; splashView = [[UIImageView alloc] initWithFrame:frame]; splashView.image = [UIImage imageNamed: @"Default.png"]; [window addSubview:splashView]; [window bringSubviewToFront:splashView]; [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.5]; [UIView setAnimationTransition:UIViewAnimationTransitionNone forView:window cache:YES]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(startupAnimationDone:finished:context:)]; splashView.alpha = 0.0; [UIView commitAnimations]; // Play default movie if any // [viewController.glView playDefaultMovieIfAny]; facebook = [[Facebook alloc] initWithAppId:@"105441111111111" andDelegate:self]; NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) { facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"]; facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"]; } if (![facebook isSessionValid]) { [facebook authorize:nil]; } } - (void) logoutButtonClicked:(id)sender { [facebook logout]; } - (void) fbDidLogout { // Remove saved authorization information if it exists NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; if ([defaults objectForKey:@"FBAccessTokenKey"]) { [defaults removeObjectForKey:@"FBAccessTokenKey"]; [defaults removeObjectForKey:@"FBExpirationDateKey"]; [defaults synchronize]; } } </code></pre>

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