Swift - 重新加载UIPageViewController与新的信息viewDidAppear

Question

如何重新加载UIPageViewController在viewDidAppear？

在那里，我刷新来自CoreData的信息，我想在视图出现时更新值。

我试着用函数reloadInputViews()，但是只有当你开始打开页面然后信息被更新时才失败。

Answer 1

如果你想重新加载UIPageViewController内ViewControllers，只是重新进行设置：

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

，如果你打算从一个的viewController内更新viewControllers，你必须调用这种方式：

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) 
    } 
}