Swift 3.1{

func playVideo() {var playerItem = AVPlayerItem(url: movieURL as URL)// 创建 AVPlayer 播放器var player = AVPlayer(playerItem: playerItem)// 将 AVPlayer 添加到 AVPlayerLayer 上let playerLayer = AVPlayerLayer(player: player)// 设置播放页面大小playerLayer.frame = CGRect(x: CGFloat(10), y: CGFloat(30), width: CGFloat(view.bounds.size.width - 20), height: CGFloat(200))// 设置画面缩放模式playerLayer.videoGravity = AVLayerVideoGravityResizeAspect// 在视图上添加播放器view.layer.addSublayer(playerLayer)// 开始播放player.play()}

}

网上有很多AVPlayer的播放器，但对于seekToTime，时间跳转都不是很精确，尤其是在使用定时器的情况下，本人找了半天，都是误人子弟，所以写了这篇精准定位的方法：self.player seekToTime(time, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

self.player seekToTime(time, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

本文重点就是这句话，其他的是一些关于实现播放器的代码，大家可以不看

一直想做一个用H5写的播放器，实现跨平台，解决苹果不能播放flv的问题,如哪位大神有经验可以指导一下Xoxo_x@126.com

ObjectIve - c:

   添加库文件：AVFoundation.framework包含头文件：#import <AVFoundation/AVFoundation.h>

简单实用:通过avplayerItem创建

// 加载网络视频NSURL *movieUrl = [NSURL URLWithString:@"http://bos.nj.bpc.baidu.com/tieba-smallvideo/11772_3c435014fb2dd9a5fd56a57cc369f6a0.mp4"];AVPlayerItem *playerItem = [AVPlayerItem playerItemWithURL:movieUrl];// 创建 AVPlayer 播放器AVPlayer *player = [AVPlayer playerWithPlayerItem:playerItem];// 将 AVPlayer 添加到 AVPlayerLayer 上AVPlayerLayer *playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];// 设置播放页面大小playerLayer.frame = CGRectMake(10, 30, self.view.bounds.size.width - 20, 200);// 设置画面缩放模式playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;// 在视图上添加播放器[self.view.layer addSublayer:playerLayer];// 开始播放[player play];

AVPlayer 本身并不能显示视频，而且它也不像 MPMoviePlayerController 有一个view 属性。如果 AVPlayer 要显示必须创建一个播放器层 AVPlayerLayer 用于展示，播放器层继承于CALayer， 
有了 AVPlayerLayer 之添加到控制器视图的 layer 中即可。要使用 AVPlayer 首先了解一下几个常用的类：AVAsset：主要用于获取多媒体信息，是一个抽象类，不能直接使用。
AVURLAsset：AVAsset 的子类，可以根据一个URL路径创建一个包含媒体信息的AVURLAsset对象。
AVPlayerItem：一个媒体资源管理对象，管理者视频的一些基本信息和状态，一个AVPlayerItem对应着一个视频资源。

本文是swift 开发的. 使用

https://objectivec2swift.com/#/home/main

可以转成Objective-C

效果图

MeidaPlayer 框架中的 MPMoviePlayerController 类和 MPMoviePlayerViewController 类是 iOS 中视频播放的开发相关类和方法。但是界面封装的已经非常固化，不适合调整。在 iOS9 中，MPMoviePlayerController 与 MPMoviePlayerViewController 类也被完全弃用，开发者使用 AVPlayerViewController 可以十分方便的实现视频播放的功能并在一些型号的 iPad 上集成画中画的功能

介绍：本博客介绍如何使用AVPlayer进行播放，暂停，视频切换，循环播放，跳转到指定时间，并精准定位，包含对AVPlayer播放器的监听等

添加播放器，播放视频

/*
根据playerItem创建播放器player 
*/if player == nil {playerItem = AVPlayerItem(URL: movieUrl)player = AVPlayer(playerItem: playerItem)
/*
创建一个播放器层 AVPlayerLayer 用于展示
*/let playerLayer:AVPlayerLayer = AVPlayerLayer(player: player)playerLayer.frame = self.view.frameplayerLayer.videoGravity = AVLayerVideoGravityResizeAspectself.view.layer.addSublayer(playerLayer)
/*
设置playerLayer.videoGravity
*/playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill/*
设置播放完成通知 Swift的方法有些特殊和oc不同#selector(SituationalEnglishVc.handleTapGesture)
*/           NSNotificationCenter.defaultCenter().addObserver(self,selector: #selector(playerEnd),name: AVPlayerItemDidPlayToEndTimeNotification,object: playerItem)addSomeObserver()playState = trueplayer.statuslet tapGesture = UITapGestureRecognizer(target: self, action: #selector(SituationalEnglishVc.handleTapGesture))tapGesture.numberOfTapsRequired = 1let tapView = UIView.init(frame: playerLayer.frame)avplayerView.addSubview(tapView)tapView.addGestureRecognizer(tapGesture)player.play()/*创建定时器，用于在特定时间跳转*/
getCurrentTimer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: #selector(SituationalEnglishVc.getCurrentMovieTime), userInfo: nil, repeats: true)NSRunLoop.mainRunLoop().addTimer(getCurrentTimer, forMode: NSDefaultRunLoopMode)}

暂停播放

 player.pause()

切换电影

movieUrl = NSURL(string: "http://bos.nj.bpc.baidu.com/tieba-smallvideo/11772_3c435014fb2dd9a5fd56a57cc369f6a0.mp4")!
playerItem = AVPlayerItem(URL: movieUrl)
//用这个方法就可以切换
player.replaceCurrentItemWithPlayerItem(playerItem)

备注：这是电影神灯的界面，神灯产品用户体验群：573431381 大家可以下载一下，看看有什么技术可以探讨一下

seekToTime精准定位

关于这个seektotime，是个坑，我跳了好多次，比如我要调到10秒，结果跳到了6秒，我要调15秒，跳到了18秒，很奇怪，我以为是AVPlayer本身定位不准，后来发现这样解决是可以的

我们不能用这个方法self.player.seekToTime(Time: CMTime)
使用这个方法，通过设置偏差tolerance，来精确设定的时间是多少，很管用self.player.seekToTime(time, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)

还有一些冗余代码是对tableview的visibleCells进行操作的大家可以不看：如下

func scrollToCurrentRow(idx:Int){currentRow = idxif self.chineseArray.count > 0 {let indexPath = NSIndexPath(forRow: idx, inSection: 0)for item in sentenceTb.visibleCells{let cell = item as! SentenceTableViewCellcell.EnglishLb.textColor = colorFromHex("666666")cell.ChineseLb.textColor = colorFromHex("666666")}let cell = sentenceTb.cellForRowAtIndexPath(indexPath) as? SentenceTableViewCellif cell != nil {cell!.EnglishLb.textColor = colorFromHex("5eecff")cell!.ChineseLb.textColor = colorFromHex("5eecff")}switch currentRow {case chineseArray.count - 1:sentenceTb.scrollToRowAtIndexPath(indexPath, atScrollPosition: UITableViewScrollPosition.Bottom, animated: true)breakcase chineseArray.count - 2:sentenceTb.scrollToRowAtIndexPath(indexPath, atScrollPosition: UITableViewScrollPosition.Middle, animated: true)breakdefault:sentenceTb.scrollToRowAtIndexPath(indexPath, atScrollPosition: UITableViewScrollPosition.Top, animated: true)break}}}

最后附上所有代码

//
//  SituationalEnglishVc.swift
//  eTimeMachine
//
//  Created by fsk-0-1-n on 16/9/18.
//  Copyright © 2016年 smartit. All rights reserved.
//import UIKitclass SituationalEnglishVc: UIViewController,UITableViewDelegate,UITableViewDataSource {var movieUrl : NSURL!var player : AVPlayer!var playState : Bool!var playerItem : AVPlayerItem! = nilvar getCurrentTimer : NSTimer! = nilvar replayTimer : NSTimer! = nilvar wordStart : CGFloat!var replayNum : Int!var isCyclePlay : Bool!var isRePlayNow : Bool!var currentRow:Int = 0var xzlrc = XZLrc()var timeArray = [CGFloat]()var wordArray = [String]()var chineseArray = [String]()@IBOutlet weak var sentenceTb: UITableView!@IBOutlet weak var wordView: UIView!@IBOutlet weak var avplayerView: UIView!@IBOutlet weak var controlView: UIView!override func viewWillAppear(animated: Bool) {self.navigationController?.navigationBarHidden = falsesetStatusBarDefault(false)setNavBarStyle()var barBtn = UIBarButtonItem.init(title: "<", style: UIBarButtonItemStyle.Done , target: nil, action: nil)self.navigationItem.leftBarButtonItem = barBtn}override func viewDidLoad() {super.viewDidLoad()movieUrl = NSURL(string: "http://bos.nj.bpc.baidu.com/tieba-smallvideo/11772_3c435014fb2dd9a5fd56a57cc369f6a0.mp4")!self.navigationItem.title = "场景轰炸"self.hideTabBar()replayNum = 0wordStart = 10.100000isCyclePlay = falseisRePlayNow = falsegetTitleNet(2)AVPlayerSetting()LoadingGif()AVPlayerControlView()setSentenceTableView()sentenceTb.separatorStyle = UITableViewCellSeparatorStyle.None}override func viewWillDisappear(animated: Bool) {self.player.removeObserver(self, forKeyPath: "status")if getCurrentTimer != nil {getCurrentTimer.invalidate()getCurrentTimer = nil}if replayTimer != nil {replayTimer.invalidate()replayTimer = nil}self.player.pause()if self.player != nil {avplayerView.removeFromSuperview()avplayerView = nil}}func getTitleNet(moiveId:Int) {//获取字幕信息xzlrc.getLrcWithUrl(moiveId) {self.timeArray = self.xzlrc.timeArrayself.wordArray = self.xzlrc.wordArrayself.chineseArray = self.xzlrc.chineseArrayself.sentenceTb.reloadData()}}func AVPlayerControlView()  {controlView.backgroundColor = colorFromHex( "1b1a18", alpha: 0.6)controlView.hidden = false}func AVPlayerSetting() {if player == nil {playerItem = AVPlayerItem(URL: movieUrl)player = AVPlayer(playerItem: playerItem)let playerLayer:AVPlayerLayer = AVPlayerLayer(player: player)playerLayer.frame = avplayerView.frameplayerLayer.videoGravity = AVLayerVideoGravityResizeAspectavplayerView.layer.addSublayer(playerLayer)playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFillNSNotificationCenter.defaultCenter().addObserver(self,selector: #selector(playerEnd),name: AVPlayerItemDidPlayToEndTimeNotification,object: playerItem)addSomeObserver()playState = trueplayer.statuslet tapGesture = UITapGestureRecognizer(target: self, action: #selector(SituationalEnglishVc.handleTapGesture))tapGesture.numberOfTapsRequired = 1let tapView = UIView.init(frame: playerLayer.frame)avplayerView.addSubview(tapView)tapView.addGestureRecognizer(tapGesture)player.play()getCurrentTimer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: #selector(SituationalEnglishVc.getCurrentMovieTime), userInfo: nil, repeats: true)NSRunLoop.mainRunLoop().addTimer(getCurrentTimer, forMode: NSDefaultRunLoopMode)}}var webView:UIWebView!func LoadingGif() {let path = NSBundle.mainBundle().pathForResource("catLittle", ofType: "gif")!let gifData = NSData(contentsOfFile: path)webView = UIWebView(frame:avplayerView.frame)self.view.addSubview(webView)webView.layer.masksToBounds = truewebView.layer.cornerRadius = 5webView.scalesPageToFit = truewebView.scrollView.scrollEnabled = falsewebView.backgroundColor = UIColor.clearColor()webView.opaque = falsewebView.loadData(gifData!, MIMEType: "image/gif", textEncodingName: "", baseURL: NSURL.init())self.view.addSubview(webView)}func addSomeObserver() {//监听PlayerItem这个类self.player.addObserver(self, forKeyPath: "status", options: NSKeyValueObservingOptions.New, context: nil)}override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {if (keyPath == "status") {if player.status == AVPlayerStatus.ReadyToPlay{print("准备播放")if self.webView != nil{self.webView.removeFromSuperview()webView = nil}}else if player.status == AVPlayerStatus.Failed || player.status == AVPlayerStatus.Unknown {player.pause()}}}func setSentenceTableView() {sentenceTb.backgroundColor = colorFromHex("1b1a18")sentenceTb.delegate = selfsentenceTb.dataSource = self}func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {return timeArray.count}func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {var ss = CGSize()ss = strSize(chineseArray[indexPath.row], withMaxSize: CGSize(width: 200,height: 0), withFont: UIFont.systemFontOfSize(15), withLineBreakMode: NSLineBreakMode.ByCharWrapping)var sss = CGSize()sss = strSize(wordArray[indexPath.row], withMaxSize: CGSize(width: 200,height: 0), withFont: UIFont.systemFontOfSize(15), withLineBreakMode: NSLineBreakMode.ByCharWrapping)return ss.height+sss.height+8}func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {var sentenceCell = tableView.dequeueReusableCellWithIdentifier("thirdID")as?SentenceTableViewCellif sentenceCell == nil{sentenceCell = SentenceTableViewCell(style: .Default, reuseIdentifier: "thirdID")}sentenceCell?.ChineseLb.text = self.chineseArray[indexPath.row]sentenceCell?.EnglishLb.text = self.wordArray[indexPath.row]var ss = CGSize()ss = strSize(self.wordArray[indexPath.row], withMaxSize: CGSize(width: 200,height: 0), withFont: UIFont.systemFontOfSize(15), withLineBreakMode: NSLineBreakMode.ByCharWrapping)sentenceCell?.EnglishLb.frame = CGRectMake(self.view.frame.size.width/2-100, 4, 200, ss.height)var sss = CGSize()sss = strSize(self.chineseArray[indexPath.row], withMaxSize: CGSize(width: 200,height: 0), withFont: UIFont.systemFontOfSize(15), withLineBreakMode: NSLineBreakMode.ByCharWrapping)sentenceCell?.ChineseLb.frame = CGRectMake(self.view.frame.size.width/2-100, ss.height+4, 200, sss.height)return sentenceCell!}func strSize(str: String, withMaxSize size: CGSize, withFont font: UIFont, withLineBreakMode mode: NSLineBreakMode) -> CGSize {var s: CGSizes = str.boundingRectWithSize(size, options: [.UsesLineFragmentOrigin, .UsesFontLeading], attributes: [NSFontAttributeName: font], context: nil).sizereturn s}func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {tableView.deselectRowAtIndexPath(indexPath, animated: true)}func handleTapGesture(){UIView.animateWithDuration(0.5) {self.controlView.hidden = !self.controlView.hidden}}func playerEnd() {if isCyclePlay == true {player.seekToTime(CMTimeMake(0, 1))player.play()}}@IBAction func playOrPauseClick(sender: AnyObject) {if playState == true {player.pause()playState = false}else{player.play()playState = true}}@IBAction func leftMovieClick(sender: AnyObject) {getTitleNet(1)movieUrl = NSURL(string: "http://bos.nj.bpc.baidu.com/tieba-smallvideo/11772_3c435014fb2dd9a5fd56a57cc369f6a0.mp4")!playerItem = AVPlayerItem(URL: movieUrl)player.replaceCurrentItemWithPlayerItem(playerItem)}@IBAction func cyclePlayClick(sender: AnyObject) {isCyclePlay = !isCyclePlay}@IBAction func rightMovieClick(sender: AnyObject) {getTitleNet(4)movieUrl = NSURL(string: "http://w2.dwstatic.com/1/5/1525/127352-100-1434554639.mp4")!playerItem = AVPlayerItem(URL: movieUrl)player.replaceCurrentItemWithPlayerItem(playerItem)}@IBAction func wordListBook(sender: AnyObject) {}func getCurrentMovieTime() {scrollAccrodingTimeArray()}func scrollAccrodingTimeArray() {let currentSecond:Double = CMTimeGetSeconds(self.playerItem.currentTime())let s = String(format: "%.1f", currentSecond)if isRePlayNow == false {//判断当前时间是否要重复强调if s == String(format: "%.1f", wordStart){isRePlayNow = truereplaySetting()}}for index in 0 ..< timeArray.count {let ss = String(format: "%.1f", timeArray[index]/1000)//判断当前时间是否要滚动句子if ss == s {scrollToCurrentRow(index)}}}func replaySetting() {replayTimer = NSTimer.scheduledTimerWithTimeInterval(1.5, target: self, selector: #selector(SituationalEnglishVc.replayThreeTimes), userInfo: nil, repeats: true)NSRunLoop.mainRunLoop().addTimer(replayTimer, forMode: NSDefaultRunLoopMode)}func replayThreeTimes() {if replayNum  >= 3{replayTimer.invalidate()replayTimer = nilisRePlayNow = falsereplayNum = 0return}replayNum = replayNum+1let timeScale = Int32(self.player.currentItem!.asset.duration.timescale)let time = CMTimeMakeWithSeconds(Float64(wordStart), timeScale);self.player.seekToTime(time, toleranceBefore: kCMTimeZero, toleranceAfter: kCMTimeZero)self.player.seekToTime(<#T##time: CMTime##CMTime#>)let currentTime1:CMTime = self.playerItem.currentTime()let currentSecond1:Double = CMTimeGetSeconds(currentTime1)print("###### \(currentSecond1)")}func scrollToCurrentRow(idx:Int){currentRow = idxif self.chineseArray.count > 0 {let indexPath = NSIndexPath(forRow: idx, inSection: 0)for item in sentenceTb.visibleCells{let cell = item as! SentenceTableViewCellcell.EnglishLb.textColor = colorFromHex("666666")cell.ChineseLb.textColor = colorFromHex("666666")}let cell = sentenceTb.cellForRowAtIndexPath(indexPath) as? SentenceTableViewCellif cell != nil {cell!.EnglishLb.textColor = colorFromHex("5eecff")cell!.ChineseLb.textColor = colorFromHex("5eecff")}switch currentRow {case chineseArray.count - 1:sentenceTb.scrollToRowAtIndexPath(indexPath, atScrollPosition: UITableViewScrollPosition.Bottom, animated: true)breakcase chineseArray.count - 2:sentenceTb.scrollToRowAtIndexPath(indexPath, atScrollPosition: UITableViewScrollPosition.Middle, animated: true)breakdefault:sentenceTb.scrollToRowAtIndexPath(indexPath, atScrollPosition: UITableViewScrollPosition.Top, animated: true)break}}}override func didReceiveMemoryWarning() {super.didReceiveMemoryWarning()// Dispose of any resources that can be recreated.}}
class SentenceTableViewCell: UITableViewCell {let EnglishLb = UILabel()let ChineseLb = UILabel()override init(style: UITableViewCellStyle, reuseIdentifier: String?) {super.init(style: style, reuseIdentifier: reuseIdentifier)self.contentView.addSubview(ChineseLb)self.contentView.addSubview(EnglishLb)self.contentView.backgroundColor = colorFromHex("1b1a18")setUpviews()self.backgroundColor = colorFromHex("1b1a18")}required init?(coder aDecoder: NSCoder) {fatalError("init(coder:) has not been implemented")}func setUpviews() {EnglishLb.frame = CGRectMake(self.contentView.frame.size.width/2-100 , 0, 200, 20)EnglishLb.text = "['prlk(e)l]"EnglishLb.font = UIFont.systemFontOfSize(15)EnglishLb.textColor = UIColor.whiteColor()EnglishLb.textAlignment = NSTextAlignment.CenterEnglishLb.numberOfLines = 0;ChineseLb.frame = CGRectMake(self.contentView.frame.size.width/2-100, 20, 200, 20)ChineseLb.text = "n:规划；计划"ChineseLb.font = UIFont.systemFontOfSize(15)ChineseLb.textColor = UIColor.whiteColor()ChineseLb.textAlignment = NSTextAlignment.CenterChineseLb.numberOfLines = 0}}