UIPageViewController用于不同索引的多种类型

Question

我有一个像这样设置的课程

class CardItemController: UIViewController,UIPageViewControllerDataSource

取决于项索引，我需要使用不同的UIViewController子类，如

private func getItemController（itemIndex：Int） - ＆gt; SuperUIPageController？ {

if itemIndex < cards.count {
    if itemIndex == 0{
        let pageItemController = CardImagePageController()
        pageItemController.itemIndex = itemIndex
        pageItemController.labelText = labelText
        //pageItemController.screenWidth = self.frame.width
        return pageItemController
    }else{
    let pageItemController = CardController()
    pageItemController.itemIndex = itemIndex
    pageItemController.labelText = labelText
    //pageItemController.screenWidth = self.frame.width
    return pageItemController
    }
}

return nil

}

CardController和CardImagePageController看起来像这样

class CardController: SuperUIPageController {
class CardImagePageController: SuperUIPageController,UIPageViewControllerDataSource {

根据索引，使用不同的UIViewControllers的正确方法是什么？现在我得到各种各样的错误，比如 在CardImagePageController我得到：

Type 'CardImagePageController' does not conform to protocol 'UIPageViewControllerDataSource'

当我有这些方法时

    func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {


func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {

private func getItemController(itemIndex: Int) -> CardImageController? {

Answer 1

在此处检查UIPageViewController代码的示例：https://github.com/dimpiax/UIPageViewControllerScrolling