> If you just want to use a solid navigation bar color and have set this up in your storyboard, use this code in your `AppDelegate` class to remove the 1 pixel border via the appearance proxy:

```objective-c
[[UINavigationBar appearance] setBackgroundImage:[[UIImage alloc] init]
                                  forBarPosition:UIBarPositionAny
                                      barMetrics:UIBarMetricsDefault];

[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];
```