Change Navigation bar Background image on each navigation

Question

I am working on iPhone app. I have added Navigation bar Background image

With interface: -

@interface UINavigationBar (backgroundImageWithTitle)

Answer 1

Using (SDK 3.2.5.) - In one of my Apps I needed navigationBar with custom image both in landscape and portrait.

What I did was:

@implementation UINavigationBar (BackgroundImage)

- (void)drawRect:(CGRect)rect 
{
    UIImage *image;

    if(self.frame.size.width == 320) //for iPhone - portrait will have 320 pix width.
    {
        image = [UIImage imageNamed: @"portraitNavigationBar.png"];
    }
    else
    {
        image = [UIImage imageNamed: @"landscapeNavigationBar.png"];
    }

    [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}

@end

Luckily my app supports rotation - so, when rotating - navigation bar automatically redraws itself.

But to manually redraw it - you can also call :

[navigationController.navigationBar setNeedsDisplay];