ios swift UITabBarController

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在AppDelegate中

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool 方法内

self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        self.window!.backgroundColor = UIColor.whiteColor()

        let vc1 = HomeViewController()
        let url1 = NSBundle.mainBundle().URLForResource("home", withExtension: "png")
        let nsData1 = NSData(contentsOfURL: url1!)
        let image1 = UIImage(data: nsData1!, scale: 5)//设置缩小五倍可以用其他方式创建UIImage
        vc1.tabBarItem = UITabBarItem(title: "首页", image: image1, tag: 1)


        let vc2 = MakeMoneyViewController()
        let url2 = NSBundle.mainBundle().URLForResource("img2", withExtension: "png")
        let nsData2 = NSData(contentsOfURL: url2!)
        let image2 = UIImage(data: nsData2!, scale: 5)
        vc2.tabBarItem = UITabBarItem(title: "页面2", image: image2, tag: 2)

        let arr = [vc1, vc2]
        let tabBarController = UITabBarController()
        tabBarController.viewControllers = arr


        self.window!.rootViewController = tabBarController

        self.window!.makeKeyAndVisible()

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