iOS7 Status Bar over Navigation Bar

iOS7 Status Bar over Navigation Bar

I'm testing my application whit iOS7 and I have an issue with status bar.
Basically the status bar appear over navigation bar like the image below:

I try to call in my viewDidLoad
- self.edgesForExtendedLayout = UIRectEdgeNone;
- self.automaticallyAdjustsScrollViewInsets = YES;
without success.
I have also added to the info plist file
UIViewControllerBasedStatusBarAppearance whit no luck.
The main problem is that the application must be compatible with iOS6 and
iOS7 and currently on iOS7 the view shifted 20px from the top.
Thanks for your support
Regards