UITabBarController Test

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//在AppDelegate.cpp中实现

subViewController *subView = [[subViewController alloc]init];

    UITabBarItem *sbuViewBarItem = [[UITabBarItem alloc]initWithTabBarSystemItem:UITabBarSystemItemBookmarks tag:0];

    UINavigationController *subViewNav = [[UINavigationController alloc]initWithRootViewController:subView];
     subViewNav.tabBarItem = sbuViewBarItem ;

    test1ViewController *test1View = [[test1ViewController alloc]init];

    UINavigationController *test1Nav = [[UINavigationController alloc]initWithRootViewController:test1View];

    UITabBarItem *rightBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemDownloads tag:0];
    test1Nav.tabBarItem = rightBarItem;

    UITabBarController *barController = [[UITabBarController alloc]init];


    barController.viewControllers = [NSArray arrayWithObjects:subViewNav ,test1Nav , nil] ;


    [self.window setRootViewController:barController];