ios - 无法使用 [AnyObject] 类型的参数列表调用“'setViewController'”

Question

“无法使用类型为‘([AnyObject]，方向:UIPageViewControllerNavigationDirection，动画:Bool，完成:nil)’的参数列表调用”‘setViewController’”

我在 Xcode 7 beta 3 中的这行代码中遇到了这个错误:

self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)

这是剩余的代码:

pageImages = NSArray(objects:"screenshot01","screenshot02","screenshot03")

        self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("MyPageViewController") as! UIPageViewController

        self.pageViewController.dataSource = self

        var initialContenViewController = self.pageTutorialAtIndex(0) as TutorialPageContentHolderViewController

        var viewControllers = NSArray(object: initialContenViewController)


        self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)

        self.pageViewController.view.frame = CGRectMake(0, 100, self.view.frame.size.width, self.view.frame.size.height-100)

        self.addChildViewController(self.pageViewController)
        self.view.addSubview(self.pageViewController.view)
        self.pageViewController.didMoveToParentViewController(self)

如果我在 Xcode 6 中运行相同的代码，我不会收到错误，而且我无法弄清楚原因。

Answer 1

签名看起来像:

func setViewControllers(_ viewControllers: [UIViewController]?,
              direction direction: UIPageViewControllerNavigationDirection,
               animated animated: Bool,
             completion completion: ((Bool) -> Void)?)

那你为什么要转换为 [AnyObject]？

尝试

self.pageViewController.setViewControllers(viewControllers as [UIViewController], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)

根据 viewControllers 的类型，您可能还需要使用 as!