How do I disable the navigation bar shadow in iOS 6 for navigation bars with custom background images?

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

Answer 1

There are two possible solutions, the second of which is mentioned in other answers.

1. Add a single, transparent, pixel at the bottom of your navigation bar background image, making it 45pt tall. This disables the shadows in iOS 6.

2. Implement the following code:

   // Omit the conditional if minimum OS is iOS 6 or above
   if ([UINavigationBar instancesRespondToSelector:@selector(setShadowImage:)]) {
       [[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];
   }
   

Source: Advanced Appearance Customization on iOS, @27:15