Flickering Screen issue in iOS 6.1

Question

I am working on iOS 5.0 targeted project. Everything was working fine until I upgraded my

device version to iOS 6.1 .In this new version I am facing some flickering issue in one

particular screen.What I am doing is as follows

dispatch_async(dispatch_get_main_queue(), ^{            

    [APPINSTANCE performSelector:@selector(loadFadingScreenFromController:)      
    withObject:self afterDelay:0.2];//Method in AppDelegate to for db sync
    [APPINSTANCE setSyncFrom: @"ORDERS"];
});

//pushing a view
OrderList *orderListObj = [[OrderList alloc] initWithNibName:@"OrderList" bundle:nil];
[self.navigationController pushViewController:orderListObj animated:YES];
self.navigationController.navigationBarHidden = NO;

After doing this I get a very weird flicker in my iPhone screen. The flicker occurs only

with iOS 6.1 , versions less then that works perfect . Any help is greatly appreciated.

Answer 1

I faced the same problem in my application.

Reason is I was displaying an alert view by using thread and that was the problem of flickering screen.

I commented that thread to display alert view and after that my application is working well.