我已经使用python创建了启动屏幕，但是在第三次（最后一个）视图之后，我想将屏幕保留到新的UIPageViewController并退出ViewController，但是仅在最后一个向左滑动之后3rd）视图。
UIPageViewController任何帮助表示赞赏，向左滑动后我想离开import UIKit
class Splash: UIPageViewController, UIPageViewControllerDelegate, UIPageViewControllerDataSource {
var pageControl = UIPageControl()
override func viewDidLoad() {
super.viewDidLoad()
dataSource = self
delegate = self
if let firstViewController = orderedViewControllers.first {
setViewControllers([firstViewController],
direction: .forward,
animated: true,
completion: nil)
}
configurePageControl()
}
private(set) lazy var orderedViewControllers: [UIViewController] = {
return [self.newColoredViewController(Page: "S1"),
self.newColoredViewController(Page: "S2"),
self.newColoredViewController(Page: "S3")]
}()
private func newColoredViewController(Page: String) -> UIViewController {
return UIStoryboard(name: "Main", bundle: nil) .
instantiateViewController(withIdentifier: Page)
}
func configurePageControl() {
pageControl = UIPageControl(frame: CGRect(x: 0,y: UIScreen.main.bounds.maxY - 50,width: UIScreen.main.bounds.width,height: 50))
self.pageControl.numberOfPages = orderedViewControllers.count
self.pageControl.currentPage = 0
self.pageControl.tintColor = UIColor.white
self.pageControl.pageIndicatorTintColor = UIColor.darkGray
self.pageControl.currentPageIndicatorTintColor = UIColor.white
self.view.addSubview(pageControl)
}
func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
return nil
}
let previousIndex = viewControllerIndex - 1
guard previousIndex >= 0 else {
return nil
}
guard orderedViewControllers.count > previousIndex else {
return nil
}
return orderedViewControllers[previousIndex] }
func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
guard let viewControllerIndex = orderedViewControllers.index(of: viewController) else {
return nil
}
let nextIndex = viewControllerIndex + 1
let orderedViewControllersCount = orderedViewControllers.count
guard orderedViewControllersCount != nextIndex else {
//This is where I need to leave the UIPageViewController but cant manage to leave after swiping left
return nil
}
guard orderedViewControllersCount > nextIndex else {
return nil
}
return orderedViewControllers[nextIndex]
}
func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
let pageContentViewController = pageViewController.viewControllers![0]
self.pageControl.currentPage = orderedViewControllers.index(of: pageContentViewController)!
}
func toLogin () {
//Peform Segue to Login Screen
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let nextViewController = storyBoard.instantiateViewController(withIdentifier: "Login") as UIViewController
self.present(nextViewController, animated:true, completion:nil)
}
}
是什么？