Custom nav bar styling - iOS [duplicate]

Solution 1:

@ludwigschubert's solution does however not work on iOS 5. Neither does overriding -drawRect:, because it isn't even called.
As of iOS 5, a navigation bar consist of a UINavigationBarBackground and a UINavigationItemView. There are two other ways of getting it work.

1. Insert your custom image view at index 1 instead of 0. This makes it appear above the native background image while staying below the buttons.

2. Make use of iOS 5's UIAppearance protocol. You can either set the background image for all

[[UINavigationBar appearance] setBackgroundImage:myImage forBarMetrics:UIBarMetricsDefault]

or for just one navigation bar:

[navigationController.navigationBar setBackgroundImage:myImage forBarMetrics:UIBarMetricsDefault]

Make sure to provide two images (UIBarMetricsDefault & UIBarMetricsLandscapePhone) when developing an iPhone app for both portrait and landscape.

Solution 2:

EDIT: This is outdated; for iOS5 there's a much better answer below, by @Jenox.

Completely custom styling for Navigation Bars is surprisingly difficult. The best writeup I know of is this one by Sebastian Celis: http://sebastiancelis.com/2009/12/21/adding-background-image-uinavigationbar/

This doesn't override drawRect, and includes a good explanation why that's a good thing. Also note you don't have to follow his tutorial. You can download the complete code here: https://github.com/scelis/ExampleNavBarBackground

Solution 3:

Just to add to the answer given by @Jenox, if you want to support both iOS 4.xx and iOS 5.xx devices (i.e. your DeploymentTarget is 4.xx), you must be careful in wrapping the call to the appearance proxy by checking at runtime if the 'appearance' selector is present or not.

You can do so by:

//Customize the look of the UINavBar for iOS5 devices
if ([[UINavigationBar class]respondsToSelector:@selector(appearance)]) {
    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"NavigationBar.png"] forBarMetrics:UIBarMetricsDefault];
}

You should also leave the iOS 4.xx workaround that you may have implemented. If you have implemented the 'drawRect' workaround for iOS 4.xx devices, as mentioned by @ludwigschubert, you should leave that in:

@implementation UINavigationBar (BackgroundImage)
//This overridden implementation will patch up the NavBar with a custom Image instead of the title
- (void)drawRect:(CGRect)rect {
     UIImage *image = [UIImage imageNamed: @"NavigationBar.png"];
     [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
@end

This will get the NavBar look the same in both iOS 4 and iOS 5 devices.

Solution 4:

Copy this into viewDidLoad. It will check for iOS 5 and use the preferred method, otherwise it will add a subview to the navBar for iOS versions < 5.0. This will work provided that your custom background image has no transparencies.

float version = [[[UIDevice currentDevice] systemVersion] floatValue];
NSLog(@"%f",version);
UIImage *backgroundImage = [UIImage imageNamed:@"myBackgroundImage.png"];
if (version >= 5.0) {
    [self.navigationController.navigationBar setBackgroundImage:backgroundImage forBarMetrics:UIBarMetricsDefault];
}
else
{
    [self.navigationController.navigationBar insertSubview:[[[UIImageView alloc] initWithImage:backgroundImage] autorelease] atIndex:1];
}