我已经对 UIPageViewController 进行了子类化，并且它工作正常。除了来回加载页面的新实例这一事实之外，而不是(如我所期望的那样)检索之前加载的实例。 引用不是应该很强吗？
以下是我的代码。
感谢您的帮助。
皮里克
class CustomPageViewController: UIPageViewController, UIPageViewControllerDataSource {
var view1: FirstCustomViewController!
var view2: SecondCustomViewController!
var view3: ThirdCustomViewController!
var views = []
override func viewDidLoad() {
super.viewDidLoad()
self.dataSource = self;
self.view1 = FirstViewController()
self.view2 = SecondViewController()
self.view3 = ThirdViewController()
self.views = [self.view1, self.view2, self.view3]
self.setViewControllers([self.view1], direction: UIPageViewControllerNavigationDirection.Forward, animated: true, completion: nil)
}
// MARK: - PageViewControllerDataSource
func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
let index = self.views.indexOfObject(viewController)
if (index > 0) {
return self.views.objectAtIndex(index-1) as? UIViewController
}
return nil
}
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
let index = self.views.indexOfObject(viewController)
if (index < self.views.count-1) {
return self.views.objectAtIndex(index+1) as? UIViewController
}
return nil
}
}
最佳答案
似乎有问题的函数在 FirstViewController、SecondViewController、ThirdViewController 中。当我写下我的问题时， View Controller 按照“viewWillAppear”方法加载 View 。 当我将代码移至“viewDidLoad”时， View 多次停止加载。
关于swift - UIPageViewController多次加载ChildViews，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32746407/