Step 1:

Create a new class named CustomUITabBarController.

Step 2:

Insert the following code

CustomUITabBarController.h

// CustomUITabBarController.h
#import <UIKit/UIKit.h>
@interface CustomUITabBarController: UITabBarController {
IBOutlet UITabBar *tabBar1;
}
@property(nonatomic, retain) UITabBar *tabBar1;
@end

CustomUITabBarController.m

// CustomUITabBarController.m
#import "CustomUITabBarController.h"
@implementation CustomUITabBarController
@synthesize tabBar1;
- (void)viewDidLoad {
[super viewDidLoad];
UIImageView *img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"NavBar.png"]];
img.frame = CGRectOffset(img.frame, 0, 1);
[tabBar1 insertSubview:img atIndex:0];
[img release];
}
@end
Step 3:

In Interface Builder, link up the newly created outlet ‘tabbar1′ to the pre-existing tab bar.

Step 4:

Add a background file NavBar.png to your project resources.

And thats it!

Downloads:

• CustomUITabBarController

References:

• http://stackoverflow.com/questions/675433/custom-colors-in-uitabbar
• http://silentmac.com/?p=386

UITabBar Backgrounds

Here are some TabBars I have quickly put together. These are free for use and adaption.