ios - 以编程方式设置标签栏项目

Question

我有一个标签栏，我想根据用户的设置更改其项目。所以我需要能够以编程方式从选项卡栏中添加/删除项目。这是我的代码:

class TabBarViewController: UITabBarController {
var controllerArray = [UIViewController]()

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    self.tabBar.tintColor = UIColor.greenColor()

    let storyBoard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle())
    let controller1 = storyBoard.instantiateViewControllerWithIdentifier("Navigation2") as! nav2
    let controller2 = storyBoard.instantiateViewControllerWithIdentifier("Explore") as! ExploreNavigation
    let controller3 = storyBoard.instantiateViewControllerWithIdentifier("friends") as! ExploreNav
    let controller4 = storyBoard.instantiateViewControllerWithIdentifier("controller3ID") as! controller3VC
    controllerArray.append(controller1)
    controllerArray.append(controller2)
    controllerArray.append(controller3)
    controllerArray.append(controller4)
   self.tabBarController?.setViewControllers(controllerArray, animated: true)

  }


}

但是如果我注释掉其中一行，例如像这样:

     //controllerArray.append(controller2)

因此该 Controller 不属于 controllersArray， Controller 仍显示在选项卡栏中。我做错了什么？

我也试过了，也没用:

 self.tabBarController?.viewControllers = controllerArray

Answer 1

就说

self.setViewControllers(controllerArray, animated: true)

代替

self.tabBarController?.setViewControllers(controllerArray, animated: true)

您继承的是 UITabBarController 而不是 UIViewController，因此您没有，或者至少不需要属性 tabBarController。