简单的创建主流框架

一、设置根控制器为TabbarViewController

    self.window = [[UIWindowalloc]
initWithFrame:[[UIScreenmainScreen]
bounds]];
    
    MainTabbarViewController *MainTab = [[MainTabbarViewControlleralloc]
init];
    self.window.rootViewController = MainTab;
    self.window.backgroundColor = [UIColorredColor];
    [self.windowmakeKeyAndVisible];
二、在根控制器中设置每个控制器的属性
1.这里提取两个方法，一个是添加所有子控制器的方法，另一个是添加每一个子控制器的方法

- (void)setUpAllChildViewController{
    // 1.添加第一个控制器
    MainViewController *oneVC = [[MainViewControlleralloc]init];
    [selfsetUpOneChildViewController:oneVCimage:[UIImageimageNamed:@"tab_home_icon"]title:@"首页"];
    
    // 2.添加第2个控制器
    ContactsViewController *twoVC = [[ContactsViewControlleralloc]init];
    [selfsetUpOneChildViewController:twoVCimage:[UIImageimageNamed:@"js"]title:@"通讯"];
    
    // 3.添加第3个控制器
    FindViewController *threeVC = [[FindViewControlleralloc]init];
    [selfsetUpOneChildViewController:threeVCimage:[UIImageimageNamed:@"qw"]title:@"发现"];
    
    // 4.添加第4个控制器
    MineViewController *fourVC = [[MineViewControlleralloc]init];
    [selfsetUpOneChildViewController:fourVCimage:[UIImageimageNamed:@"user"]title:@"我的"];
}
/**
 *  添加一个子控制器的方法
 */
- (void)setUpOneChildViewController:(UIViewController *)viewController image:(UIImage
*)image title:(NSString *)title{
    
    UINavigationController *navC = [[UINavigationControlleralloc]initWithRootViewController:viewController];
    navC.title = title;
    navC.tabBarItem.image = image;
    [navC.navigationBarsetBackgroundImage:[UIImageimageNamed:@"commentary_num_bg"]forBarMetrics:UIBarMetricsDefault];
    
    viewController.navigationItem.title = title;
    
    [selfaddChildViewController:navC];
}

放上github链接:https://github.com/daniel1214/OutshotTabbarDemo.git