swift – 获取此错误PageViewController不符合协议’UIPageViewControllerDataSource’

我无法修复此错误或找出此错误的原因,错误显示在下面的屏幕截图中.

只是尝试创建一个pageViewController的演示,我无法添加dataSource类,而self.dataSource = self.

提前致谢.

仅仅为自定义类添加协议定义是不够的.您必须至少提供UIPageViewControllerDataSource协议的两个必需功能：

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

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