一、小叙
UIPageViewController是一个实现图书阅读的控制器，使用它可以设置书脊位置、单双页、过渡效果等，它是通过代理的方式来实现翻页，也即上一页、下一页。最终这个UIPageViewController被包装后添加到当前控制器即可。
二、直接上代码
// // ViewController.swift // PageViewControllerDemo // // Created by 夏远全 on 2017/1/19. // Copyright © 2017年 夏远全. All rights reserved. // import UIKit class ViewController: UIViewController,UIPageViewControllerDelegate,UIPageViewControllerDataSource { //定义UIPageViewController和内容数组 var pageController:UIPageViewController! var pageContent:[String] = [String]() override func viewDidLoad() { super.viewDidLoad() //初始化UIPageViewController //transitionStyle: 翻页效果（卷起来翻卷、水平活动翻卷） //navigationOrientation：翻页方向（水平方向、竖直方向） //options: 这是一个字典，设置翻页控制器的书脊位置（none／min／mid／max） pageController = UIPageViewController.init(transitionStyle: .pageCurl, navigationOrientation: .horizontal, options: [UIPageViewControllerOptionSpineLocationKey:NSNumber(value:UIPageViewControllerSpineLocation.min.rawValue)]) pageController.view.frame = self.view.bounds //设置代理，提供展示相关的信息和接收手势发起的转换的通知 pageController.delegate = self //设置数据源,提供展示的内容 pageController.dataSource = self //创建显示内容 self.createContentPages() //初始化内容控制器 let initalViewController = self.viewControllerAtIndex(index: 0) pageController.setViewControllers([initalViewController!], direction: .forward, animated: false) { (b:Bool) in //UIPageController必须放在Controller Container中 self.addChildViewController(self.pageController) self.view.addSubview(self.pageController.view) self.pageController.didMove(toParentViewController: self) } } //自定义方法，创建显示视图 func viewControllerAtIndex(index:Int) -> ContentViewController? { if self.pageContent.count == 0 || index > self.pageContent.count { return nil } let dataViewController = ContentViewController() dataViewController.dataObject = self.pageContent[index] dataViewController.loadHTMLContent() return dataViewController } //自定义方法，获取viewController的页码 func indexOfViewController(viewControler:ContentViewController) -> Int { return self.pageContent.index(of: viewControler.dataObject!)! } //自定义方法，创建显示内容 func createContentPages() -> Void { for i in 1..<11 { let contentString = "<html><head></head><body><h1>《侠客行》</h1><p>第(i)页</p></body></html>" pageContent.append(contentString) } } //实现UIPageViewControllerDeleagte代理方法 //将要翻页 func pageViewController(_ pageViewController: UIPageViewController, willTransitionTo pendingViewControllers: [UIViewController]) { print("started") } //翻页结束 func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) { print("finished") } //设置书脊位置 func pageViewController(_ pageViewController: UIPageViewController, spineLocationFor orientation: UIInterfaceOrientation) -> UIPageViewControllerSpineLocation { return .min } //设置设备支持方向 func pageViewControllerSupportedInterfaceOrientations(_ pageViewController: UIPageViewController) -> UIInterfaceOrientationMask { return .all } //设置优选方向 func pageViewControllerPreferredInterfaceOrientationForPresentation(_ pageViewController: UIPageViewController) -> UIInterfaceOrientation { return .portrait } //实现UIPageViewControllerDataSource数据源方法 //返回总页数 func presentationCount(for pageViewController: UIPageViewController) -> Int { return self.pageContent.count } //向前翻页 func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? { //获取当前viewController的页码 var index:Int = self.indexOfViewController(viewControler: viewController as! ContentViewController) //如果是第0页，返回nil if index == 0 || (index == NSNotFound) { return nil } index -= 1 return self.viewControllerAtIndex(index: index) } //向后翻页 func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? { //获取当前viewController的页码 var index:Int = self.indexOfViewController(viewControler: viewController as! ContentViewController) if index == NSNotFound { return nil } index += 1 //如果是最后一张，返回nil if index == self.pageContent.count { return nil } return self.viewControllerAtIndex(index: index) } }
三、效果（点击屏幕实现翻页）
