iOS 7 custom back button

Question

I want to use custom back button. in iOS 6 everything is perfect but iOS 7 is strange.

[[UIBarButtonItem appearance] setBackButtonBackgroundImage:[[UIImage imageNamed:@"back_button_normal"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12.0, 0, 12.0)] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

first, it has no iOS 7 arrow and no background image.

(Russian locale)

then, if you press the button background image appears. Also i had background image set for UIControlStateHighlighted state and when you hold the button pressed highlighted image appears too. After any back button once pressed all back buttons have background image.

BUT! If you present modal view controller, dismiss it, then push any view controller - iOS 7 arrow will appear at every back button.

I use DP5. Is that a UIKit bug?

PS Also i tried to create back button manually, using UIBarButtonItem, set background image to it, then self.navigationItem.backBarButtonItem = barButtonItem; Did not help. Then i tried to set background image to disabled state and change enabled property of my bar button item, did not help too.

Answer 1

This is not a bug, this how Back button looks in iOS 7. For example:

You should probably use the new concept for your application, and not to set background image for back button in iOS 7.

If you still want you back button have the same as it looked in iOS6 than you should probably create those back buttons manually:

- (void)loadView
{
    [super loadView];

    UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 60.0f, 30.0f)];
    UIImage *backImage = [[UIImage imageNamed:@"back_button_normal.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12.0f, 0, 12.0f)];
    [backButton setBackgroundImage:backImage  forState:UIControlStateNormal];
    [backButton setTitle:@"Back" forState:UIControlStateNormal];
    [backButton addTarget:self action:@selector(popBack) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
    self.navigationItem.leftBarButtonItem = backButtonItem;
}

-(void) popBack {
  [self.navigationController popViewControllerAnimated:YES];
}

Edit: Not to break Swipe Gesture (Here is a source)

self.navigationController.interactivePopGestureRecognizer.delegate = (id<UIGestureRecognizerDelegate>)self;

Answer 2

The custom background image not appearing on the first push was fixed in iOS 7 GM.

To hide standard back indicator use this code:

if ([UINavigationBar instancesRespondToSelector:@selector(setBackIndicatorImage:)]) { // iOS 7
    [navigationBarAppearance setBackIndicatorImage:[UIImage imageNamed:@"transparent_1px"]];
    [navigationBarAppearance setBackIndicatorTransitionMaskImage:[UIImage imageNamed:@"transparent_1px"]];
}