Question

It seems in iOS 6, a drop shadow is automatically added to the navigation bar even when you set a custom background image. I’m pretty sure this wasn’t the case with iOS 5 as when I test the same code in the iOS 5 and 6 sim, the shadow appears in iOS 6 but not 5.

Does anyone know anything about this? Or how to enable/disable it?

Answer 1

Place this in your AppDelegate

[[UINavigationBar appearance] setShadowImage:[UIImage new]];
// is IOS 7 and later
[[UINavigationBar appearance] setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];

Swift version with updates from comments

    UINavigationBar.appearance().shadowImage = UIImage()
    UINavigationBar.appearance().setBackgroundImage(UIImage(), forBarMetrics: .Default)