- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {ViewController *vc1 = [[ViewController alloc] init];UserGuideViewController *vc2 = [[UserGuideViewController alloc] init];UITabBarController *tabBarController = [[UITabBarController alloc] init];tabBarController.viewControllers = [[NSArray alloc] initWithObjects:vc1, vc2, nil];for(int i=0; i<tabBarController.tabBar.items.count; i++) {UITabBarItem *item = [tabBarController.tabBar.items objectAtIndex:i];item.title = [NSString stringWithFormat:@"子栏目%d",i];NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor grayColor],UITextAttributeTextColor, nil];[item setTitleTextAttributes:dict forState:UIControlStateNormal];NSDictionary *dict2 = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor],UITextAttributeTextColor,nil];[item setTitleTextAttributes:dict2 forState:UIControlStateSelected];}self.window.rootViewController = tabBarController;[self.window makeKeyAndVisible];return YES;
}

UIView *bgView = [[UIView alloc] initWithFrame:self.tabBar.bounds];
bgView.backgroundColor = [UIColor redColor];
[self.tabBar insertSubview:bgView atIndex:0];

CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [[UIColor redColor] CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();self.tabBar.backgroundImage = image;

UIImage *bgImage = [UIImage imageNamed:@"Image1"];
[[UITabBar appearance] setBackgroundImage:[bgImage resizableImageWithCapInsets:UIEdgeInsetsZero]];
[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"Image2"]];

[self.tabBar setBackgroundImage:[UIImage imageNamed:@"GuideImage1"]];
[self.tabBar setSelectionIndicatorImage:[UIImage imageNamed:@"GuideImage2"]];

- (void)viewDidLoad {[super viewDidLoad];UIImage *carIcon = [UIImage imageNamed:@"CarIcon"];UIImage *grayCarIcon = [UIImage imageNamed:@"GrayCarIcon"];ViewController *vc1 = [[ViewController alloc] init];UITabBarItem *item1 = [[UITabBarItem alloc] initWithTitle:@"栏目A" image:carIcon tag:0];item1.selectedImage = grayCarIcon;vc1.tabBarItem = item1;UserGuideViewController *vc2 = [[UserGuideViewController alloc] init];UITabBarItem *item2 = [[UITabBarItem alloc] initWithTitle:@"栏目B" image:carIcon tag:0];item2.selectedImage = grayCarIcon;vc2.tabBarItem = item2;self.viewControllers = [[NSArray alloc] initWithObjects:vc1, vc2, nil];[self setSelectedViewController:vc2];
}

UITabBarItem *item = self.tabBar.items[0];NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor grayColor],UITextAttributeTextColor, nil];
[item setTitleTextAttributes:dict forState:UIControlStateNormal];NSDictionary *dict2 = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor],UITextAttributeTextColor,nil];
[item setTitleTextAttributes:dict2 forState:UIControlStateSelected];