每当滑动 UIPageViewController 时调用什么函数？

Question

每当滑动 UIPageView 时，我需要执行另一个函数。

Answer 1

符合UIPageViewControllerDelegate并实现以下方法：

func pageViewController(UIPageViewController, willTransitionTo: [UIViewController]) {
    // called when swiping begins
}

func pageViewController(UIPageViewController, didFinishAnimating: Bool, previousViewControllers: [UIViewController], transitionCompleted: Bool) {
    // called when swiping ends
}

Answer 2

查看 UIPageViewControllerDelegate。您可能正在寻找 pageViewController(_:didFinishAnimating:previousViewControllers:transitionCompleted:)