Swift 2 语法错误，方向 .Forward
Swift 2 syntax error with direction .Forward
我写在Swift1.2下：
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
但是现在，在 Swift 2 中，它向我打印了下一个错误：
Could not find member 'Forward'
我该如何解决？
您应该确保您的 viewControllers 不是可选类型。如：
var viewControllers:[UIViewController] = [VC1,VC2]
self.pageViewController.setViewControllers(viewControllers, direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)
我写在Swift1.2下：
self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
但是现在，在 Swift 2 中，它向我打印了下一个错误：
Could not find member 'Forward'
我该如何解决？
您应该确保您的 viewControllers 不是可选类型。如：
var viewControllers:[UIViewController] = [VC1,VC2]
self.pageViewController.setViewControllers(viewControllers, direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)