Weird issues: the navigation bar of some my app's UI disappears on iOS 11 when the app is built with Xcode 8. But, the UI renders correctly when it is built with Xcode 9 beta.

The navigation bar just disappears on iOS 11 when our app is built with XCode 8.



Same code and Same app, without any modification, we use latest XCode 9 beta to build our app and install it on same device. The issue just goes away, the navigation bar is there.


I suspect there might be compatible issues with either iOS 11 or the XCode 8.


Can anyone help me ? Is there any way to submit a new build built with XCode 9 to app store before iOS 11 kicks off.

Weird issues: the navigation bar of some my app's UI disappears on iOS 11 when the app is built with Xcode 8. But, the UI renders correctly when it is built with Xcode 9 beta.
 
 
Q