Swift 2 syntax error with direction .Forward

问题

I wrote in Swift 1.2 the next:

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

but now, in Swift 2 it prints me the next error:

Could not find member 'Forward'

How can I fix it?

回答1:

You should make sure that your viewControllers not optional Type. Such as:

var viewControllers:[UIViewController] = [VC1,VC2]
self.pageViewController.setViewControllers(viewControllers, direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)

来源：https://stackoverflow.com/questions/32564132/swift-2-syntax-error-with-direction-forward