iOS: remove navigationbar's background (image)

Question

At my main view, that contains a menu, I have an image on the navigationbar. When I select one of the menu items, I want to remove the background image and set text, normally.

When the second view opens, the background image still there. I tried everything, following some answers on StackOverflow, but still getting the same error.

I tried this:

- (void)viewWillDisappear:(BOOL)animated
{
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(36, 36), NO, 0.0);
    UIImage *blank = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    [[UINavigationBar appearance] setBackgroundImage:blank forBarMetrics:UIBarMetricsDefault];


    [super viewWillDisappear:animated];

}

Didn't work. Tried this:

@implementation ViewController{
    UIImage *_bgNavigationBarImage;
}

- (void) viewWillAppear:(BOOL)animated {
    _bgNavigationBarImage = [self.navigationController.navigationBar backgroundImageForBarMetrics:UIBarMetricsDefault];
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navigation-bar-home.png"] forBarMetrics:UIBarMetricsDefault];

}


- (void)viewWillDisappear:(BOOL)animated
{
    [self.navigationController.navigationBar setBackgroundImage:_bgNavigationBarImage forBarMetrics:UIBarMetricsDefault];

    [super viewWillDisappear:animated];

}

Didn't work too. Tried to set nil to background and still doesn't working.

Answer 1

Done!

Used the first method, but changing this:

[[UINavigationBar appearance] setBackgroundImage:blank forBarMetrics:UIBarMetricsDefault];

for this:

[self.navigationController.navigationBar setBackgroundImage:blank forBarMetrics:UIBarMetricsDefault];