MBProgressHUD UIViewController animation inconsistent

Question

In this project, I am using a MBProgressHUD when I get JSON content from a server. The first time I start my app, the animation from my MenuViewController to my Page works fine. But when I go back to my Menu and to the Page again, no viewcontroller switch animation is shown. It only happens when I add the MBProgressHUD functionality..

My Page ViewDidLoad method:

- (void)viewDidLoad
{
    [super viewDidLoad];

    HUD = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    [self performSelectorInBackground:@selector(loadPage) withObject:nil];
}

The loadPage method, simplified:

-(void) loadPage {
    //loading functionality, deleted for now.


    dispatch_async(dispatch_get_main_queue(), ^{

         [_lblTitle setText: [postsArray[0] objectForKey:@"title"]];
         [_webview loadHTMLString:[postsArray[0] objectForKey:@"content"] baseURL:nil];
         [HUD hide:YES];
    });

}

So when I delete the 2nd and 3rth line in viewDidLoad and the HUD hide, the animation works fine every time. What am I doing wrong?

Answer 1

Replace

HUD = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
    [self performSelectorInBackground:@selector(loadPage) withObject:nil];

with

MBProgressHUD *searchHUD = [[MBProgressHUD alloc] initWithView:self.view];
        searchHUD.dimBackground=YES;
        searchHUD.animationType = MBProgressHUDAnimationZoom;
        [self.view addSubview:searchHUD];
        [searchHUD showWhileExecuting:@selector(loadPage) onTarget:self withObject:Nil animated:YES];

Reason: MBProgressHud provides this functionality to run any method in background thread..