两种常用的app导航结构（UINavigationController＋UITabBarController）

今天复习了下两种app导航（UINavigationController＋UITabBarController）的架构：

1、window（或者如有登陆页面，登陆成功后presentViewController到tabController）的rootViewController为UITabBarController，UITabBarController的viewControllers设置为n个UINavigationController，每个UINavigationViewController的rootViewController为自定义VC；

2、rootViewController为UINavigationController，UINavigationController的rootViewControllers设置为一个自定义UITabBarController，UITabBarController的viewControllers设置为n个UINavigationController，每个UINavigationViewController的rootViewController为自定义VC；

显然第二种方式多了个NavigationController，别人一个demo地址https://github.com/JNTian/JTNavigationController ；

自己一直都使用第一种方式，流程图如下

a、首先在Appdelegate里添加如下代码：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    UITabBarController * tabController = [[UITabBarController alloc] init];
    UINavigationController * nav1 = [[UINavigationController alloc] initWithRootViewController:[[ViewController alloc]init]];//UIViewController可以自定义
    nav1.tabBarItem.title = @"first";
    nav1.tabBarItem.image = nil;
//    nav1.navigationBar.backgroundColor = [UIColor redColor];//背景而已
    nav1.navigationBar.barTintColor = [UIColor redColor];
    nav1.hidesBottomBarWhenPushed = YES;
    //看来标题要在每个vc中设置self.title
//    nav1.title = @"first";
//    nav1.navigationItem.title = @"first";
    UINavigationController * nav2 = [[UINavigationController alloc] initWithRootViewController:[[UIViewController alloc]init]];
    nav2.tabBarItem.title = @"second";
    nav2.tabBarItem.image = nil;
    UINavigationController * nav3 = [[UINavigationController alloc] initWithRootViewController:[[UIViewController alloc]init]];
    nav3.tabBarItem.title = @"three";
    nav3.tabBarItem.image = nil;
    [tabController setViewControllers:@[nav1,nav2,nav3]];
    self.window.rootViewController = tabController;//[[UINavigationController alloc] init];
    //[[ViewController alloc] init];
    [self.window makeKeyAndVisible];
    return YES;
}

b、在自定义VC类中

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"first";
    self.view.backgroundColor = [UIColor whiteColor];
    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Next" style:UIBarButtonItemStylePlain target:self action:@selector(didTapNextButton)];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didTapNextButton{
    ViewController* vc = [[ViewController alloc] init];
    vc.hidesBottomBarWhenPushed = YES;
    [self.navigationController pushViewController:vc animated:YES];
}

最后附上代码地址：https://github.com/Carl-Yao/DemoForNavigation.git