Tag: 刷机

在Swift 3 iOS中向前游泳时，在UIPageViewController中调用After和Before方法

我用数据源数组做了UIPageViewController，它工作正常。 但是在向前和向后滑动方向转接呼叫时， 我的代码在这里： import UIKit class MainPageViewController: UIPageViewController,UIPageViewControllerDataSource { override func viewDidLoad() { super.viewDidLoad() self.dataSource = self initUPageVC(idx:0,isAnimate:false,direction: UIPageViewControllerNavigationDirection.forward) } func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? { //PRIVIOUS let pageContent: MainPageContentViewController = viewController as! MainPageContentViewController var index = pageContent.index if ((index == 0) || (index == NSNotFound)) { return nil } index […]