CODEWITHSUNDEEP
iosxcode8uipageviewcontroller
Brandon A
Brandon A

Reputation: 8279

Xcode 8.2: UIPageViewControllerDatasource method broken

I am working on an application that uses a UIPageViewController to present two main view controllers. I am subclassing the UIPageViewController and conforming to the UIPageViewControllerDatasource protocol. The methods in this protocol allow me to set the view controllers I want to display. But the following methods are giving me trouble.

func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {}

and 

func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {}

The issue is the compiler keeps trying to get the parameters in the method to change. It will suggest I made a mistake and either viewControllerAfter or viewControllerBefore should be changed. And I keep getting stuck in this loop with this error, "method 'pageViewController(_:viewControllerBefore:)' has different argument names from protocol 'UIPageViewControllerDatasource'."

BEFORE

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Then I make the change as suggested, and it persists.

AFTER

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I need some pointers on how to get around this.

Upvotes: 4

Views: 306

Answers (1)

Caleb Kleveter
Caleb Kleveter

Reputation: 11484

From my understanding, you need to implement both methods. This should get rid of your errors.

Upvotes: 4

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