来自UIPageViewController的完整图像未显示在我的iOS 8项目中

我一直在尝试使用UIPageViewController创建一个简单的iOS应用程序，一切似乎都很好…除了我的图像被完全切断。在UIPageViewController中只显示了我的图像的顶部，经过几个小时的不同设置等等，我似乎什么也没有得到。我不知道这是不是我的图像分辨率有问题，还是图像在情节提要中的实际位置有问题

我将在下面提供一些屏幕截图和代码：

为了让您知道应用程序在运行时的样子，这里有一些屏幕截图。注意，底部的小条是我的图像，如果我滑动，它们会切换到其他图像。问题是我希望我的图像是全屏的，但它们显然不是，我不知道为什么。

AppDelegate.swift中的代码：

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.

        var pageController = UIPageControl.appearance()
        pageController.pageIndicatorTintColor = UIColor.lightGrayColor()
        pageController.currentPageIndicatorTintColor = UIColor.blackColor()
        pageController.backgroundColor = UIColor.whiteColor()

        return true
    }
}

ViewController.swift中的代码：

import UIKit

// line below is where I get the error

class ViewController: UIViewController, UIPageViewControllerDataSource {

//end

    var pageViewController: UIPageViewController!
    var pageTitles: NSArray!
    var pageImages: NSArray!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.pageTitles = NSArray(objects: "", "", "")
        self.pageImages = NSArray(objects: "page1", "page2", "page3")

        self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PageViewController") as!
        UIPageViewController

        self.pageViewController.dataSource = self

        var startVC = self.viewControllerAtIndex(0) as ContentViewController
        var viewControllers = NSArray(object: startVC)

        self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)

        self.addChildViewController(self.pageViewController)
        self.view.addSubview(self.pageViewController.view)
        self.pageViewController.didMoveToParentViewController(self)
    }

    @IBAction func restartAction(sender: AnyObject) {
    }

    func viewControllerAtIndex(index: Int) -> ContentViewController
    {
        if ((self.pageTitles.count == 0) || (index >= self.pageTitles.count))
        {
            return ContentViewController()
        }

        var vc: ContentViewController = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as! ContentViewController

        vc.imageFile = self.pageImages[index] as! String

        vc.pageIndex = index

        return vc
    }

    // Mark: - Page View Controller Data Source

    func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {

        var vc = viewController as! ContentViewController
        var index = vc.pageIndex as Int

        if (index == 0 || index == NSNotFound)
        {
            return nil
        }

        index--
        return self.viewControllerAtIndex(index)
    }

    func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {

        var vc = viewController as! ContentViewController
        var index = vc.pageIndex as Int

        if (index == NSNotFound)
        {
            return nil
        }

        index++

        if (index == self.pageTitles.count)
        {
            return nil
        }

        return self.viewControllerAtIndex(index)
    }

    func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
        return self.pageTitles.count
    }

    func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
        return 0
    }
}

import UIKit

class ContentViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!

    var pageIndex: Int!
    var imageFile: String!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.imageView.image = UIImage(named: self.imageFile)
    }
}

最后是ContentViewController.swift中的代码：

import UIKit

// line below is where I get the error

class ViewController: UIViewController, UIPageViewControllerDataSource {

//end

    var pageViewController: UIPageViewController!
    var pageTitles: NSArray!
    var pageImages: NSArray!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.pageTitles = NSArray(objects: "", "", "")
        self.pageImages = NSArray(objects: "page1", "page2", "page3")

        self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("PageViewController") as!
        UIPageViewController

        self.pageViewController.dataSource = self

        var startVC = self.viewControllerAtIndex(0) as ContentViewController
        var viewControllers = NSArray(object: startVC)

        self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)

        self.addChildViewController(self.pageViewController)
        self.view.addSubview(self.pageViewController.view)
        self.pageViewController.didMoveToParentViewController(self)
    }

    @IBAction func restartAction(sender: AnyObject) {
    }

    func viewControllerAtIndex(index: Int) -> ContentViewController
    {
        if ((self.pageTitles.count == 0) || (index >= self.pageTitles.count))
        {
            return ContentViewController()
        }

        var vc: ContentViewController = self.storyboard?.instantiateViewControllerWithIdentifier("ContentViewController") as! ContentViewController

        vc.imageFile = self.pageImages[index] as! String

        vc.pageIndex = index

        return vc
    }

    // Mark: - Page View Controller Data Source

    func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? {

        var vc = viewController as! ContentViewController
        var index = vc.pageIndex as Int

        if (index == 0 || index == NSNotFound)
        {
            return nil
        }

        index--
        return self.viewControllerAtIndex(index)
    }

    func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {

        var vc = viewController as! ContentViewController
        var index = vc.pageIndex as Int

        if (index == NSNotFound)
        {
            return nil
        }

        index++

        if (index == self.pageTitles.count)
        {
            return nil
        }

        return self.viewControllerAtIndex(index)
    }

    func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
        return self.pageTitles.count
    }

    func presentationIndexForPageViewController(pageViewController: UIPageViewController) -> Int {
        return 0
    }
}

import UIKit

class ContentViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!

    var pageIndex: Int!
    var imageFile: String!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.imageView.image = UIImage(named: self.imageFile)
    }
}

以下是我所有的图片：

这是我的故事板

以下是包含我的UIImageViewer的内容视图控制器（我想问题可能是我在这里设置的格式/使用，但我可能错了）

---

我的第一个建议是确保您已将自动布局约束添加到您的

UIImageView

。您将如何做到这一点？我似乎找不到可以在其中切换自动布局约束的设置部分？