Question

我正在使用UIPageViewController全屏显示图像。问题是图像没有全屏显示。相反，图像与页面控制视图点之间的底部和顶部之间存在间隙。我有一个UIViewController，作为子视图/子项添加到UIPageController，ViewController使用ImageView显示图像。我试图在swift / storyboard中做到这一点。

我在故事板中将顶部栏和底栏选项更改为“无”，但它不起作用。

图片预览：

enter image description here

ChildViewControllerCode：

class BoatContentViewController: UIViewController {

@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var titleLabel: UILabel!


var pageIndex: Int!
var titleText: String!
var imageFile: String!


override func viewDidLoad() {
    super.viewDidLoad()

    self.imageView.image = UIImage(named: self.imageFile)
    self.titleLabel.text = self.titleText


    // Do any additional setup after loading the view.
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

mainViewControllerCode：

class BoatViewController: UIViewController, UIPageViewControllerDataSource {
@IBOutlet weak var loginButton: UIButton!
@IBOutlet weak var skipButton: UIButton!

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

override func viewDidLoad() {
    super.viewDidLoad()

    loginButton.backgroundColor = UIColor.clearColor()
    loginButton.layer.cornerRadius = 5
    loginButton.layer.borderWidth = 1
    loginButton.layer.borderColor = UIColor.purpleColor().CGColor


    skipButton.backgroundColor = UIColor.whiteColor()
    skipButton.layer.cornerRadius = 5
    skipButton.layer.borderWidth = 1
    skipButton.layer.borderColor = UIColor.whiteColor().CGColor


    self.pageTitles = NSArray(objects: "", "", "", "", "")
    self.pageImages = NSArray(objects: "onboarding1", "onboarding2", "onboarding3", "onboarding4", "onboarding5")
    self.pageViewController = self.storyboard?.instantiateViewControllerWithIdentifier("BoatPageViewController") as! UIPageViewController
    self.pageViewController.dataSource = self
    var startVC = self.viewControllerAtIndex(0) as BoatContentViewController
    var viewControllers = NSArray(object: startVC)
    self.pageViewController.setViewControllers(viewControllers as [AnyObject], direction: .Forward, animated: true, completion: nil)
    self.pageViewController.view.frame = CGRectMake(0, 30, self.view.frame.width, self.view.frame.size.height - 60)
    self.addChildViewController(self.pageViewController)
    self.view.addSubview(self.pageViewController.view)
    self.pageViewController.didMoveToParentViewController(self)

    // Do any additional setup after loading the view.
}

func viewControllerAtIndex(index: Int) -> BoatContentViewController {

    if ((self.pageTitles.count == 0) || (index >= self.pageTitles.count)) {

        return BoatContentViewController()

    }


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

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

    vc.titleText = self.pageTitles[index]as! String

    vc.pageIndex = index

    return vc
}

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

{

    var vc = viewController as! BoatContentViewController

    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! BoatContentViewController

    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
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

App Delegate：

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



    var pageControl = UIPageControl.appearance()

    pageControl.pageIndicatorTintColor = UIColor.lightGrayColor()

    pageControl.currentPageIndicatorTintColor = UIColor.blackColor()

    pageControl.backgroundColor = UIColor.clearColor()



    return true
}

Answer 1

UIPageViewController有一个视图，其中将显示其页面。那些页面不能大于该视图 - 换句话说，它们是内部页面视图控制器。

您的UIPageViewController的视图小于屏幕 - 它允许页面控件和按钮的底部空间，以及导航栏的顶部。你自己导致这是真的：

self.pageViewController.view.frame = 
    CGRectMake(0, 30, self.view.frame.width, self.view.frame.size.height - 60)

您可以在顶部留出30个点，在底部留出30个点。因此，它显示的图像永远不会大于那个。它们永远不会是“全屏”。

Answer 2

Swift 3 版本，当子类化UIPageViewController时：

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()

    let subViews: NSArray = view.subviews as NSArray
    var scrollView: UIScrollView? = nil
    var pageControl: UIPageControl? = nil

    for view in subViews {
        if view is UIScrollView {
          scrollView = view as? UIScrollView
        } else if view is UIPageControl {
            pageControl = view as? UIPageControl
        }
    }

    if (scrollView != nil && pageControl != nil) {
        scrollView?.frame = view.bounds
        view.bringSubview(toFront: pageControl!)
    }
}

在视图控制器/页面视图控制器（swift）中使图像视图全屏显示

2 个答案: