Question

“无法调用”'setViewController'，其参数列表类型为'（[AnyObject]，direction：UIPageViewControllerNavigationDirection，animated：Bool，completion：nil）'“

我在这行代码中遇到了Xcode 7 beta 3中的这个错误：

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

这是代码的其余部分：

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中运行相同的代码并且无法弄清楚原因，我不会收到错误。

Answer 1

签名如下：

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

那你为什么要投身[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!

Answer 2

在xcode7.0中，您可以将其更改为

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

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

2 个答案: