Swift 视频切换界面不间断播放，断点续播。

需要你在了解AVPlayer播放器的基础上来学习。
基本上核心都是有注释的地方，如果你对AVPlayer播放器很熟悉只看注释的地方就可以。

在CollectionView创建播放器，点击后跳转到新界面继上次播放时间继续播放

import UIKit
import AVKit
let SCREEN_WIDTH = UIScreen.main.bounds.size.width
let SCREEN_HEIGHT = UIScreen.main.bounds.size.height
class ViewController: UIViewController {
    private var collectionView:UICollectionView?
    var player : AVPlayer!
    var playerItem : AVPlayerItem!
    var urlAsset: AVURLAsset!
    override func viewDidLoad() {
        super.viewDidLoad()
       setUI()
    }
    func setUI() {

        let layout = UICollectionViewFlowLayout.init()

        layout.itemSize = CGSize(width: SCREEN_WIDTH, height: 300)
        let rect = CGRect(x: 0, y: 84, width:SCREEN_WIDTH , height: SCREEN_HEIGHT-64)
        collectionView = UICollectionView(frame: rect, collectionViewLayout: layout)
        collectionView?.delegate = self
        collectionView?.dataSource = self
        view.addSubview(collectionView!)
        collectionView?.register(CollectionViewCell.self, forCellWithReuseIdentifier: "identifier")
        collectionView?.backgroundColor = UIColor.lightGray


    }

}

extension ViewController:
    UICollectionViewDelegate,
    UICollectionViewDataSource{


    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 1
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "identifier", for: indexPath) as! CollectionViewCell

        return cell
    }
    func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
        

        playCellVideo(cell: cell as! CollectionViewCell)

    }
    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        self.player.pause()
        let video = VideoViewController()
//当前播放时间
        video.time = self.playerItem.currentTime()
//视频帧率，没有这个值续播时间不准确，可能提前几秒，可延后几秒
        video.timeScale = Int32(self.urlAsset.duration.timescale)
//视频链接
        video.urlAsset = self.urlAsset
//我们需要把这3个值传过去就可以做到不间断播放
        self.navigationController?.pushViewController(video, animated: true)

    }

    func playCellVideo(cell: CollectionViewCell){


        self.urlAsset = (AVAsset.init(url: NSURL(string: "https://vt1.doubanio.com/201609291737/4af83e686c0432c0dbd3c320f14eba6f/view/movie/M/302030039.mp4")! as URL) as! AVURLAsset)// swiftlint:disable:this force_cast

        self.playerItem = AVPlayerItem.init(asset: self.urlAsset)
        self.player = AVPlayer.init(playerItem: self.playerItem)
        self.player.rate = 1.0

        let playerLayer = AVPlayerLayer.init(player: self.player)

        playerLayer.frame = cell.contentView.bounds
        playerLayer.videoGravity = AVLayerVideoGravity.resizeAspect
        playerLayer.contentsScale = UIScreen.main.scale
        playerLayer.backgroundColor = UIColor.white.cgColor
        cell.contentView.layer.addSublayer(playerLayer)
        self.player.play()


    }

    
}

新界面里继续播放

import UIKit
import AVKit
class VideoViewController: UIViewController {
    var urlAsset: AVURLAsset!
    var timeScale: CMTimeScale!
    var player : AVPlayer!
    var playerItem : AVPlayerItem!
    var time : CMTime!
    override func viewDidLoad() {
        super.viewDidLoad()
        setVideoUI()

    }
    
    func setVideoUI(){
        self.playerItem = AVPlayerItem.init(asset: self.urlAsset)
        self.player = AVPlayer.init(playerItem: self.playerItem)
        self.player.rate = 1.0

        let playerLayer = AVPlayerLayer.init(player: self.player)

        playerLayer.frame = CGRect(x: 0, y: 84, width: self.view.frame.width, height: 500)
        playerLayer.videoGravity = AVLayerVideoGravity.resizeAspect
        playerLayer.contentsScale = UIScreen.main.scale
        self.view.layer.addSublayer(playerLayer)
// 通过传过来帧率和时间换算出来当前播放器播放的时间
        let time = CMTimeMakeWithSeconds(CMTimeGetSeconds(self.time), preferredTimescale: self.timeScale);
//对播放进行时间定位， toleranceBefore：提前多长时间 toleranceAfter：延后多长时间，因为我们做了时间换算所有并不需要提前和延后。(实现了精准定位)
        self.player.seek(to:time, toleranceBefore: CMTime.zero, toleranceAfter: CMTime.zero)
        self.player.play()

}


}

这只是一个简单的例子，有什么问题可以给我留言