Swift - 使用viewDidAppear中的新信息重新加载UIPageViewController

Question

如何在viewDidAppear中重新加载UIPageViewController？

在那里，我从CoreData刷新信息，我希望在视图出现时更新值。

我尝试使用函数reloadInputViews()，但仅在您开始打开页面时失败，然后更新信息。

Answer 1

如果要在UIPageViewController中重新加载ViewControllers，只需将它们重新设置为：

pageViewController(pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool)

如果要从viewController内部更新viewControllers，则必须以这种方式调用它：

override func viewDidAppear(animated: Bool) {
    super.viewDidAppear(animated)
    let viewControllers: [UIViewControllers] = [UIViewController()]
    if let pageViewController = parentViewController as? UIPageViewController {
        pageViewController.setViewControllers(viewControllers, direction: .Forward, animated: true, completion: nil)
    }
}