---
title: "pageViewController(_:viewControllerBefore:)"
framework: CareKit
role: symbol
role_heading: Instance Method
platforms: [iOS 13.0+, Mac Catalyst 13.0+, watchOS 7.0+]
path: "carekit/ockweekcalendarpageviewcontroller/pageviewcontroller(_:viewcontrollerbefore:)"
---

# pageViewController(_:viewControllerBefore:)

Inherited from UIPageViewControllerDataSource.pageViewController(_:viewControllerBefore:).

## Declaration

```swift
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController?
```