小賢的部落格

Swift 2.2:

    /**

     依序彈出頁面

     */

    func runPresentViewControllerLoop() {

        let application = UIApplication.sharedApplication()

        let previousPresenter = navigationToHomePage()

        application.keyWindow?.rootViewController = previousPresenter

        var presenterArray = [showTourIfNeeded(), showServiceTermsIfNeeded(), showLoginIfNeeded()]

        presentNextViewControllerIfNeeded(previousPresenter, presenterArray: &presenterArray)

    }

    /**

     Present View controller 遞回

     - parameter previousPresenter: previousPresenter description

     - parameter presenterArray:    presenterArray description

     */

    func presentNextViewControllerIfNeeded(previousPresenter: UIViewController, inout presenterArray: [UIViewController?])

    {

        guard let lastObject = presenterArray.popLast() else {

            return

        }

        guard let viewController = lastObject else {

            return

        }

        // 不能加[ weak self]

        previousPresenter.presentViewController(viewController, animated: presenterArray.count == 0) {

            self.presentNextViewControllerIfNeeded(viewController, presenterArray: &presenterArray)

        }

    }