Question

首先，我对Xcode 10和Swift 4完全陌生，我已经在这里进行搜索，但是找不到有效的代码。

我追求的是：在启动应用程序时播放本地存储的视频（称为“ launchvideo”）。视频播放完成后，显示/移动到带有故事板ID为“菜单”的UIviewcontroller

到目前为止，我的主导航控制器带有链接的视图控制器。我猜我需要一个UIview来保存要在此页面上播放的视频吗？

有人可以帮助新手吗？谢谢

Answer 1

首先从“常规”选项卡中的项目设置将启动屏幕情节提要板更改为“主情节提要”。

使用以下名称创建一个视图控制器，并编写代码以实现AVPlayer播放视频。

import UIKit
import AVFoundation

class VideoLaunchVC: UIViewController {

    func setupAVPlayer() {

        let videoURL = Bundle.main.url(forResource: "Video", withExtension: "mov") // Get video url
        let avAssets = AVAsset(url: videoURL!) // Create assets to get duration of video.
        let avPlayer = AVPlayer(url: videoURL!) // Create avPlayer instance
        let avPlayerLayer = AVPlayerLayer(player: avPlayer) // Create avPlayerLayer instance
        avPlayerLayer.frame = self.view.bounds // Set bounds of avPlayerLayer
        self.view.layer.addSublayer(avPlayerLayer) // Add avPlayerLayer to view's layer.
        avPlayer.play() // Play video

        // Add observer for every second to check video completed or not,
        // If video play is completed then redirect to desire view controller.
        avPlayer.addPeriodicTimeObserver(forInterval: CMTime(seconds: 1, preferredTimescale: 1) , queue: .main) { [weak self] time in

            if time == avAssets.duration {
                let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "ViewController") as! ViewController
                self?.navigationController?.pushViewController(vc, animated: true)
            }
        }
    }

    //------------------------------------------------------------------------------

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    //------------------------------------------------------------------------------

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        self.setupAVPlayer()  // Call method to setup AVPlayer & AVPlayerLayer to play video
    }
}

主机板：

项目启动屏幕文件：

另请参见以下视频：

https://youtu.be/dvi0JKEpNTc

Answer 2

您必须在 launchvideoVC 上加载视频，就像在 swift 4及更高版本

中以下面的方式

 import AVFoundation
 import AVKit

 override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    initVideo()
 }

func initVideo(){
    do {
            try AVAudioSession.sharedInstance().setCategory(.ambient, mode: .default)
            try AVAudioSession.sharedInstance().setActive(true)
    } catch {
        print(error)
    }

    let path = Bundle.main.path(forResource: "yourlocalvideo", ofType:"mp4");
    player = AVPlayer(url: NSURL(fileURLWithPath: path!) as URL)
    NotificationCenter.default.addObserver(self, selector: #selector(launchvideoVC.itemDidFinishPlaying(_:)), name: .AVPlayerItemDidPlayToEndTime, object: player?.currentItem)
    DispatchQueue.main.async(execute: {() -> Void in
        let playerLayer = AVPlayerLayer(player: self.player)
        playerLayer.frame = self.view.bounds
        playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill
        playerLayer.zPosition = 1
        self.view.layer.addSublayer(playerLayer)
        self.player?.seek(to: CMTime.zero)
        self.player?.play()

    })
}

@objc func itemDidFinishPlaying(_ notification: Notification?) {
   //move to whatever UIViewcontroller with a storyboard ID of "menu"
}

我认为这可能会对您有所帮助。编码愉快：）

Answer 3

首先，您将使用视图制作一个新的视图控制器，并将启动屏幕故事板从“常规”选项卡中的项目设置更改为“主故事板”。

还将视频添加到文件夹中。

然后将我下面的代码添加到启动screenView控制器中：

import UIKit

import MediaPlayer

import AVKit

class LaunchViewController: UIViewController {

    fileprivate var rootViewController: UIViewController? = nil

    var player: AVPlayer?

    var playerController = AVPlayerViewController()

    override func viewDidLoad() {

        super.viewDidLoad()

        showSplashViewController()



        // Do any additional setup after loading the view.

    }



    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    func playVideo() {

        let videoURL = NSURL(string: "videoplayback")

        player = AVPlayer(url: videoURL! as URL)

        let playerController = AVPlayerViewController()

        playerController.player = player

        self.addChildViewController(playerController)



        // Add your view Frame

        playerController.view.frame = self.view.frame



        // Add subview in your view

        self.view.addSubview(playerController.view)



        player?.play()

    }

    private func loadVideo() {



        //this line is important to prevent background music stop

        do {

            try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryAmbient)

        } catch { }



        let path = Bundle.main.path(forResource: "videoplayback", ofType:"mp4")



        let filePathURL = NSURL.fileURL(withPath: path!)

        let player = AVPlayer(url: filePathURL)

        let playerLayer = AVPlayerLayer(player: player)



        playerLayer.frame = self.view.frame

        playerLayer.videoGravity = AVLayerVideoGravity.resizeAspectFill

        playerLayer.zPosition = -1



        self.view.layer.addSublayer(playerLayer)





        player.seek(to: kCMTimeZero)

        player.play()

    }



    func showSplashViewControllerNoPing() {



        if rootViewController is LaunchViewController {

            return

        }



        loadVideo()

    }



    /// Simulates an API handshake success and transitions to MapViewController

    func showSplashViewController() {

        showSplashViewControllerNoPing()



        delay(6.00) {

            self.showMenuNavigationViewController()

        }

    }



    public func delay(_ delay:Double, closure:@escaping ()->()) {

        DispatchQueue.main.asyncAfter(

            deadline: DispatchTime.now() + Double(Int64(delay * Double(NSEC_PER_SEC))) / Double(NSEC_PER_SEC), execute: closure)

    }



    /// Displays the MapViewController

    func showMenuNavigationViewController() {

        guard !(rootViewController is Home) else { return }



        let storyboard = UIStoryboard(name: "Main", bundle: nil)

        let nav =  storyboard.instantiateViewController(withIdentifier: "homeTab") as! Home

        nav.willMove(toParentViewController: self)

        addChildViewController(nav)

        if let rootViewController = self.rootViewController {

            self.rootViewController = nav

            rootViewController.willMove(toParentViewController: nil)



            transition(from: rootViewController, to: nav, duration: 0.55, options: [.transitionCrossDissolve, .curveEaseOut], animations: { () -> Void in



            }, completion: { _ in

                nav.didMove(toParentViewController: self)

                rootViewController.removeFromParentViewController()

                rootViewController.didMove(toParentViewController: nil)

            })

        } else {

            rootViewController = nav

            view.addSubview(nav.view)

            nav.didMove(toParentViewController: self)

        }





    }



    override var prefersStatusBarHidden : Bool {

        switch rootViewController  {

        case is LaunchViewController:

            return true

        case is Home:

            return false

        default:

            return false

        }

    }



}

Swift 4和Xcode10。在应用启动时播放视频，完成后显示视图控制器

3 个答案: