self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor = [UIColor whiteColor];
// 2.创建TabBarCongtroller
UITabBarController *tab = [[UITabBarController alloc] init];
// 3.加载Storyboard
UIStoryboard *homeVC =[UIStoryboard storyboardWithName:@"Home" bundle:nil];
UIStoryboard *messageVC =[UIStoryboard storyboardWithName:@"Message" bundle:nil];
UIStoryboard *pointVC =[UIStoryboard storyboardWithName:@"Point" bundle:nil];
UIStoryboard *MineVC =[UIStoryboard storyboardWithName:@"mine" bundle:nil];
//3.5 设置tabBarItem
UINavigationController *homeNav = [homeVC instantiateInitialViewController];
UIViewController *home = homeNav.topViewController;
home.title = @"首页";
UINavigationController *messageNav = [messageVC instantiateInitialViewController];
UIViewController *message = messageNav.topViewController;
message.tabBarItem.title = @"消息";
message.tabBarItem.image = [UIImage imageNamed:@"1"];
// 4.创建Storyboard添加到TabBarCongtroller中
tab.viewControllers=@[homeNav,messageNav,pointVC.instantiateInitialViewController,MineVC.instantiateInitialViewController];
// 5.设置根控制器
self.window.rootViewController = tab;
// 6.显示Window
[self.window makeKeyAndVisible];
