Ios AppDelegate Touch3D Xcode-选项卡栏

我第一次尝试在swift 2中的xcode 7.3.1中实现3D触摸。我在info.plist中插入了这些信息，直到这里，你可以从代码中看到打开视图的效果，问题是我没有查看选项卡栏。。。所以我决定改变一切，打开tab控制器，然后从那里开始在selectindex=2的部分中键入，但不知道如何做。。。选择索引函数AppDelegate与工作，有人可以帮我吗

这是我在AppDelegate中管理3D Touch的代码

func application(application: UIApplication, performActionForShortcutItem shortcutItem: UIApplicationShortcutItem, completionHandler: Bool -> Void) {
        //questo codice verrà eseguito ogni volta che le Quick Actions verranno eseguite
        if (shortcutItem.type == "com.tuu.openSearch") {
          //section search THIS WORK without TabBar!!
            let viewcontroller = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("searchID")
            dispatch_async(dispatch_get_main_queue(), {
                self.window!.rootViewController?.presentViewController(viewcontroller, animated: false, completion: nil)
            })

        }
        if (shortcutItem.type == "com.tuu.openFavorite"){
            //section tabbar favorite, self.tabBarcontroller.selectedIndex = 2 not work!!
            let viewcontroller = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("favoritesID")
            viewcontroller.tabBarController?.selectedIndex = 2
            dispatch_async(dispatch_get_main_queue(), {
                self.window!.rootViewController?.presentViewController(viewcontroller, animated: false, completion: nil)

            })
        }
    }

解决

解决

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请让我知道viewController是UIViewController还是UIAvgitaionController？这是TabController，这实际上是错误。。。谢谢，现在请让我知道viewController是UIViewController还是UIAvgitaionController？这是TabController，这实际上是错误。。。谢谢，现在可以了

if (shortcutItem.type == "com.tuu.openFavorite"){
            let tabBarController = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewControllerWithIdentifier("favoritesID") as! UITabBarController
            tabBarController.selectedIndex = 2
            self.window?.rootViewController = tabBarController

        }