AppDelegate:

1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 2     // Override point for customization after application launch. 3     //1.创建窗口 4     self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds]; 5     //设置窗口的根控制器 6     CYXTabBarController *tabBarVC = [[CYXTabBarController alloc]init]; 7     self.window.rootViewController = tabBarVC; 8     //3.显示窗口 9     [self.window makeKeyAndVisible];10     return YES;11 }

CYXTabBarController:

@interface CYXTabBarController : UITabBarController

1 - (void)viewDidLoad { 2     [super viewDidLoad]; 3     // Do any additional setup after loading the view.VC 4      5     //添加第一个控制器 6     //1.1 初始化 7     CYXOneViewController *oneVC = [[CYXOneViewController alloc]init]; 8     //1.2 把oneVC添加为UINavigationController的根控制器 9     UINavigationController *nav1 = [[UINavigationController alloc]initWithRootViewController:oneVC];10     //设置tabBar的标题11     nav1.title = @"首页";12     //设置导航栏背景颜色13     nav1.navigationBar.barTintColor = [UIColor yellowColor];14     //设置tabBar的图标15     nav1.tabBarItem.image = [UIImage imageNamed:@"icon_tabbar_merchant_normal"];16     //设置navigationBar的标题17     oneVC.navigationItem.title = @"这是导航栏标题1";18     //设置背景色19     oneVC.view.backgroundColor = [UIColor whiteColor];20     //1.3 把UINavigationController交给UITabBarController管理21     [self addChildViewController:nav1];22     23     //添加第二个控制器24     CYXTwoViewController *twoVC = [[CYXTwoViewController alloc]init];25     UINavigationController *nav2 = [[UINavigationController alloc]initWithRootViewController:twoVC];26     nav2.title = @"我的";27     //设置导航栏背景图片28     //[nav2.navigationBar setBackgroundImage:[UIImage imageNamed:@""] forBarMetrics:UIBarMetricsDefault];29     nav2.tabBarItem.image = [UIImage imageNamed:@"icon_tabbar_mine"];30     twoVC.navigationItem.title = @"这是导航栏标题2";31     twoVC.view.backgroundColor = [UIColor whiteColor];32     [self addChildViewController:nav2];33     34     //添加第三个控制器35     CYXThreeViewController *threeVC = [[CYXThreeViewController alloc]init];36     UINavigationController *nav3 = [[UINavigationController alloc]initWithRootViewController:threeVC];37     nav3.title = @"开门";38     nav3.tabBarItem.image = [UIImage imageNamed:@"icon_tabbar_onsite"];39     threeVC.navigationItem.title = @"这是导航栏标题3";40     threeVC.view.backgroundColor = [UIColor whiteColor];41     [self addChildViewController:nav3];42     43     //添加第四个控制器44     CYXFourViewController *fourVC = [[CYXFourViewController alloc]init];45     UINavigationController *nav4 = [[UINavigationController alloc]initWithRootViewController:fourVC];46     nav4.title = @"更多";47     nav4.tabBarItem.image = [UIImage imageNamed:@"icon_tabbar_misc"];48     fourVC.navigationItem.title = @"这是导航栏标题4";49     fourVC.view.backgroundColor = [UIColor whiteColor];50     [self addChildViewController:nav4];51 }

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