用代码生成UINavigationController 与UITabBarController相结合的简单QQ框架（部分）

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
    // 在这里创建一个tabbarcontroller
    UITabBarController *tabBarController = [[UITabBarController alloc]init];
    // 把创建好的tabbar设置成rootviewcontroller
    self.window.rootViewController = tabBarController;
    // 在tabbar里边添加子控制器
    UITableViewController *vc1 = [[UITableViewController alloc]init];
    // 设置导航栏的标题
    vc1.title = @"消息列表";
    UIBarButtonItem *barBtn = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"menu_icon_bulb"] style:UIBarButtonItemStylePlain target:self action:nil];
    vc1.navigationItem.rightBarButtonItem = barBtn;
    // 将一般控制器 转换为导航控制器
    UINavigationController *nav1 = [[UINavigationController alloc]initWithRootViewController:vc1];
    // 设置tabbar的item项 的文字
    nav1.tabBarItem.title = @"消息";
    // 设置item 的图片
    nav1.tabBarItem.image = [UIImage imageNamed:@"tab_recent_nor"];
    // 设置显示数字
    nav1.tabBarItem.badgeValue = @"20";
    
    UITableViewController *vc2 = [[UITableViewController alloc]init];
    //vc2.view.backgroundColor = [UIColor blueColor];
    //NSArray *segmentedArray = [[NSArrayalloc]initWithObjects:@"1",@"2",@"3",@"4",nil];
    // 首先创建一个数组，内部存上UISegmentedControl按钮的文字
    NSArray *segmentTitle = [[NSArray alloc]initWithObjects:@"分组",@"全部", nil];
    UISegmentedControl *segment = [[UISegmentedControl alloc]initWithItems:segmentTitle];
    segment.selectedSegmentIndex = 0; //设置默认选择项索引
    //设置样式
    // segment.segmentedControlStyle = UISegmentedControlStylePlain;
    //设置在点击后是否恢复原样
    // segment.momentary = YES;
    // [segment setImage:[UIImage imageNamed:@"btn_jyy.png"] forSegmentAtIndex:3];//设置指定索引的图片
    // 具体segmentcontrol的用法请参照： http://www.cnblogs.com/top5/archive/2012/05/17/2506618.html
    
    // 将按钮添加到navigationitem的导航栏上去
    vc2.navigationItem.titleView = segment;
    UIBarButtonItem *barBtn2 = [[UIBarButtonItem alloc]initWithImage:[UIImage imageNamed:@"header_icon_add"] style:UIBarButtonItemStyleDone target:self action:nil];
    vc2.navigationItem.rightBarButtonItem = barBtn2;
    UINavigationController *nav2 = [[UINavigationController alloc]initWithRootViewController:vc2];
    nav2.tabBarItem.title = @"联系人";
    nav2.tabBarItem.image = [UIImage imageNamed:@"tab_buddy_nor"];
    tabBarController.viewControllers = @[nav1,nav2];
    
    
    
    // 显示在window窗口
    [self.window makeKeyAndVisible];
    return YES;
}