Question

Have a little design issue after having upgraded to iOS 5 and Xcode 4.2

This is how my view looked in iOS 4:

1 http://casperslynge.dk/1

And this is how it looks like in iOS 5:

2 http://casperslynge.dk/2

In my navigation delegate I have the following method to draw the “image” at the top:

- (void)drawRect:(CGRect)rect {
    UIImage *image;
    if(self.barStyle == UIBarStyleDefault){
        image = [UIImage imageNamed: @"topbar_base.png"];
    }
    else{
        image = [UIImage imageNamed: @"nyhedsbar_base.png"];    
    }
    [image drawInRect:CGRectMake(-1, -1, self.frame.size.width+3, self.frame.size.height+3)];
}

And inside my controller I set the following:

self.navigationBarStyle = UIBarStyleBlack;

How come it is not working in iOS 5?

Thanks

Answer 1

Under iOS5, you need to use UIAppearance. Have a look at that. Here’s an example for using it conditionally so that you can continue to support iOS4:

// iOS5-only to customize the nav bar appearance
if ([[UINavigationBar class] respondsToSelector:@selector(appearance)]) {
    UIImage *img = [UIImage imageNamed: @"NavBarBackground.png"];
    [[UINavigationBar appearance] setBackgroundImage:img forBarMetrics:UIBarMetricsDefault];
}

As you can see, this sets a custom background image for all UINavigationBars. There are lots of things you can do with UIAppearance. You’ll want to keep any custom stuff you’re currently doing in drawRect: since pre-iOS4 devices will still use that and not the new UIAppearance code.