ScheduleViewController

import UIKit

class ScheduleViewController: BaseViewController {

    @IBOutlet weak var pageContentView: UIView!
    @IBOutlet weak var currentDateLabel: UILabel!

    private var pageViewController: UIPageViewController?
    var allSchedules = [[String: Any]]()

    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationTitle = "SCHEDULE"
        initDailySchedulePageView()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func initDailySchedulePageView() {
        //setup pageview
        self.pageViewController = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: [UIPageViewControllerOptionInterPageSpacingKey: 20])

        self.pageViewController?.delegate = self
        self.pageViewController?.dataSource = self
        self.pageViewController?.automaticallyAdjustsScrollViewInsets = false;

        self.addChildViewController(self.pageViewController!)
        self.pageViewController?.didMove(toParentViewController: self)
        self.pageContentView.addSubview(self.pageViewController!.view)
        self.pageViewController?.view.frame = CGRect(x: 0, y: 0, width: pageContentView.frame.size.width, height: pageContentView.frame.size.height)
        self.pageViewController?.view.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleTopMargin, .flexibleLeftMargin, .flexibleRightMargin, .flexibleBottomMargin]

        for i in 0..<10 {
            let schedules = [
                "date": "2016/11/" + String(21 + i),
                "schedule": [
                    ScheduleTime(startTime: 10, endTime: 11),
                    ScheduleTime(startTime: 13, endTime: 14),
                    ScheduleTime(startTime: 13.5, endTime: 14.5),
                    ScheduleTime(startTime: 13.5, endTime: 14.5),
                    ScheduleTime(startTime: 13.5, endTime: 14.5),
                    ScheduleTime(startTime: 12.5, endTime: 15.5)
                    //            ScheduleTime(startTime: 10.5, endTime: 17.5)
                ]
            ] as [String : Any]
            allSchedules.append(schedules)
        }

        gotoPage(0)
    }

    func gotoPage(_ page: Int, animated: Bool = false) {
        if page >= 0 && page < allSchedules.count {
            let schedules = allSchedules[page]
            if let dateString = schedules["date"] as? String {
                self.currentDateLabel.text = dateString
            }
            if let scheduleTimes = schedules["schedule"] as? [ScheduleTime] {
                let viewController = DailyScheduleViewController(withSchedules: scheduleTimes)
                viewController.pageIndex = page
                self.pageViewController?.setViewControllers([viewController], direction: .forward, animated: animated, completion: nil)
            }
        }
    }

    func getPage(_ page: Int) -> DailyScheduleViewController? {
        if page >= 0 && page < allSchedules.count {
            let schedules = allSchedules[page]
            if let scheduleTimes = schedules["schedule"] as? [ScheduleTime] {
                let viewController = DailyScheduleViewController(withSchedules: scheduleTimes)
                viewController.pageIndex = page
                return viewController
            }
        }
        return nil
    }

    @IBAction func onPreviousDayClicked(_ sender: Any) {
        if let controllers = self.pageViewController?.viewControllers {
            if controllers.count > 0 {
                if let dailyController = controllers[0] as? DailyScheduleViewController {
                    let pageIndex = dailyController.pageIndex
                    if pageIndex > 0 {
                        gotoPage(pageIndex - 1, animated: true)
                    }
                }
            }
        }
    }

    @IBAction func onNextDayClicked(_ sender: Any) {
        if let controllers = self.pageViewController?.viewControllers {
            if controllers.count > 0 {
                if let dailyController = controllers[0] as? DailyScheduleViewController {
                    let pageIndex = dailyController.pageIndex
                    if pageIndex < allSchedules.count - 1 {
                        gotoPage(pageIndex + 1, animated: true)
                    }
                }
            }
        }
    }

}

extension ScheduleViewController: UIPageViewControllerDelegate, UIPageViewControllerDataSource {
    func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
        if let currentPageController = viewController as? DailyScheduleViewController {
            let pageIndex = currentPageController.pageIndex
            if pageIndex > 0 {
                return getPage(pageIndex - 1)
            }
        }
        return nil
    }

    func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
        if let currentPageController = viewController as? DailyScheduleViewController {
            let pageIndex = currentPageController.pageIndex
            if pageIndex < allSchedules.count - 1 {
                return getPage(pageIndex + 1)
            }
        }
        return nil
    }

    func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
        if let controllers = pageViewController.viewControllers {
            if controllers.count > 0 {
                if let dailyController = controllers[0] as? DailyScheduleViewController {
                    let page = dailyController.pageIndex
                    if page >= 0 && page < allSchedules.count {
                        let schedules = allSchedules[page]
                        if let dateString = schedules["date"] as? String {
                            self.currentDateLabel.text = dateString
                        }
                    }
                }
            }
        }
    }
}