- (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];