How to change the border color below the navigation bar?

Question

Can anyone advise me on how the border below the navigation bar can be changed?

Answer 1

Despite navigationBar is read-only property for UINavigationController you can avoid this restriction by "setValue:forKey:". This method was approved on 5 applications successfully submitted to AppStore.

You can subclass UINavigationBar and change drawRect: method as you want. For example,

@implementation CustomNavigationBar

- (void) drawRect:(CGRect)rect
{
    [super drawRect:rect];
    UIImage *backgroundImage = ImageFromColor(WANTED_COLOR);
    [backgroundImage drawInRect:rect];
}

After you can subclass UINavigationController and change initWithRootViewController:

- (id) initWithRootViewController:(UIViewController *)rootViewController
{
    self = [super initWithRootViewController:rootViewController]; 
    if (self) 
    {
        CustomNavigationBar *navBar = [CustomNavigationBar new];
        [self setValue:navBar forKey:@"navigationBar"];
    }
    return self;
}

Also you can vary this approach by making Category for UINavigationController and implementing method swizzling for initWithRootViewController:

P.S. Yesterday my new app appeared at AppStore without any problem with this approach.