func pageViewController()

in sampleapp-ios-swift/RootViewController.swift [47:54]

• 8 lines of code
• 3 McCabe index (conditional complexity)

    func pageViewController(_: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        let index = services.firstIndex(of: viewController.restorationIdentifier!)
        if (index == 0) || (index == NSNotFound) {
            return nil
        } else {
            return storyboard?.instantiateViewController(withIdentifier: services[index! - 1])
        }
    }