UINavigationController和Storyboard的应用

1.新建项目

2.删除项目自带的ViewController和Main.storyboard,并且在target里面General的Main Interface删除Main


3.新建MyTabBarController，继承自UITabBarController

4.新建两个storyboard，命名为AStoryboard和BStoryboard


5.为两个storyboard添加导航

6.新建两个控制器，命名为AViewController和BViewController，继承自UIViewController

7.将故事板即AStoryboard和AViewController绑定以及BStoryboard和BViewController绑定，并且在A故事板上拉一个label，设置text为A，便于切换界面的时候显示，也可设置不同的背景色以便区分A和B故事板


8.在MyTabBarController.m里面写代码将控制器加入tabBar

UINavigationController *naviConA = [[UIStoryboard storyboardWithName:@"AStoryboard" bundle:[NSBundle mainBundle]]instantiateInitialViewController];    naviConA.title = @"A";    [self addChildViewController:naviConA];    UINavigationController *naviConB = [[UIStoryboard storyboardWithName:@"BStoryboard" bundle:[NSBundle mainBundle]] instantiateInitialViewController];    naviConB.title = @"B";    [self addChildViewController:naviConB];

9.在AppDelegate.m写启动

在引入头文件后，写如下启动代码

 self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];    MyTabBarController *myTabBar = [[MyTabBarController alloc]init];    self.window.rootViewController = myTabBar;    [self.window makeKeyAndVisible];

10.运行发现项目崩了，错误显示界面

这是因为我忘了在属性面板勾选“ Is Initial View Controller”
11.勾选以后，运行显示效果如下