iOS Swift程序化UITabBar

Question

我正在尝试在IOS中创建和使用UITabBar 。 我的代码生成了一个UITabBar，但是当我单击一个选项卡时，它崩溃并显示错误-

• （主线程） “线程1：EXC_BAD_ACCESS（代码= 1，地址= 0x18）”

这是代码，在视图控制器的viewDidLoad（）中调用

    let v1 : UIView = UIView(frame:self.view.frame);
    let v2 : UIView = UIView(frame:self.view.frame);

    v1.backgroundColor  = UIColor.redColor();
    v2.backgroundColor = UIColor.blueColor();

    let vc1 : UIViewController = UIViewController();
    let vc2 : UIViewController = UIViewController();

    vc1.view = v1;
    vc2.view = v2;

    vc1.title = "View 1";
    vc2.title = "View 2";

    let nav1 : UINavigationController = UINavigationController(rootViewController: vc1);
    let nav2 : UINavigationController = UINavigationController(rootViewController: vc2);

    nav1.delegate = self;
    nav2.delegate = self;

    let tabsArr : [UINavigationController] = [nav1, nav2];

    let main_tab : UITabBarController = UITabBarController();

    main_tab.viewControllers = tabsArr;
    main_tab.delegate = self;

    self.view.addSubview(main_tab.view);

这是上面代码的视图

题

如何以编程方式100％运作？ 当我单击选项卡时，我想通过更改选项卡来响应！

谢谢 ：）

Answer 1

多亏了T先生的帮助，我解决了！ 关键是UITabBarController 替换了UIViewController，它没有放入其中！

这是AppDelegate.swift中的最终解决方案：

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

    self.window = UIWindow.init(frame: UIScreen.mainScreen().bounds);

    let N : Int = 4;

    for(var i = 0; i < N; i++) {
        print("please?");

        let newView : UIView = UIView();

        let redC   : CGFloat = CGFloat(arc4random_uniform(255))/CGFloat(255);
        let greenC : CGFloat = CGFloat(arc4random_uniform(255))/CGFloat(255);
        let blueC  : CGFloat = CGFloat(arc4random_uniform(255))/CGFloat(255);

        newView.backgroundColor = UIColor(red: redC, green: greenC, blue: blueC, alpha: 1);

        views.append(newView);

        let newViewController : UIViewController = UIViewController();

        newViewController.title = String(format: "View %d", arguments: [i]);

        newViewController.view = newView;

        let newNavC : UINavigationController = UINavigationController(rootViewController: newViewController);

        navs.append(newNavC);
    }

    let main_tab : UITabBarController = UITabBarController();

    main_tab.viewControllers = navs;

    self.window?.rootViewController = main_tab;

    self.window?.makeKeyAndVisible();

    return true;
}

谢谢你Mr.T !!!!!!! :)