app stuck with blackscreen after default.png

Question

Hi my application gets stuck on a black screen after default.png and then nothing else is loaded . we updated a old project of xcode 3.0 to xcode 4 , and the flow at the begining is

appdelegate -->Window (bgcolor-black )-->Rooviewcontroller(bgColor-black) -->Main view(at end of init method by performslector for ad network loading ) .

Note: Its works fine for our devices but users are complaining of application get stucking in black screen or of UI get being unresponsive. Also its a window based application according to old template.

We are not able to get hold of the issue or the reason that mayb causing it please help..

following is the code

    mainViewControllerApp *objVC=[[mainViewControllerApp alloc] init];
    objVC.view.frame=[[UIScreen mainScreen] bounds];

    [self.window setRootViewController:objVC];

Answer 1

Just a thought, is init: really your designated initializer for this view controller?

Typicaly, you either use initWithFrame: (if creating the view programmatically) or initWithNibName:bundle (if loading the view from a bundle).

If this view controller is suppose to be loading a view from a bundle, this could very well result in the behavior you're describing (the view controller doesn't know where the view is and the correct initializer is never called)...