ios - 具有多个 viewController 的 pageController

Question

我正在尝试添加一个具有多个 View Controller 的页面 Controller 。我首先在 interfacebuilder 中创建了一个 contentView 并在其中嵌入了一个 pageController。然后我添加了下面的代码，但它似乎没有显示任何内容？

   let initialViewController = self.viewControllerAtIndex(0)
    self.pageViewController?.setViewControllers([initialViewController], direction: .Forward, animated: false, completion: nil)

PAgeViewController 扩展

var viewControllerIdentifiers = ["BottomNoLogo", "TopNoLogo"]



extension CameraViewController: UIPageViewControllerDataSource {
func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {
    let currentText = viewController.restorationIdentifier

    var currentIndex = viewControllerIdentifiers.indexOf(currentText!)
    if currentIndex == viewControllerIdentifiers.count - 1 {
        return viewControllerAtIndex(0)
    } else {
        return viewControllerAtIndex(++currentIndex!)
    }
}

func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {
    let currentText = viewController.restorationIdentifier

    var currentIndex = viewControllerIdentifiers.indexOf(currentText!)
    if currentIndex == 0 {
        return viewControllerAtIndex(viewControllerIdentifiers.count - 1)
    } else {
        return viewControllerAtIndex(--currentIndex!)
    }
}

func viewControllerAtIndex(index: Int) -> UIViewController {

    let contentViewController = storyboard?.instantiateViewControllerWithIdentifier(viewControllerIdentifiers[index])

    return contentViewController!
}


}

Answer 1

页面 View Controller 实际上只是提供点:您仍然必须将 Controller 的 View 添加为父 View 的 subview 并管理滚动。那里有很多例子。参见 http://www.appcoda.com/uipageviewcontroller-tutorial-intro/ ，例如。