1，AVPlayer介绍

2，效果图

3，样例代码

import UIKit
import AVFoundation

class ViewController: UIViewController {
    
    //播放按钮
    @IBOutlet weak var playButton: UIButton!
    
    //可拖动的进度条
    @IBOutlet weak var playbackSlider: UISlider!
    
    //当前播放时间标签
    @IBOutlet weak var playTime: UILabel!
    
    //播放器相关
    var playerItem:AVPlayerItem?
    var player:AVPlayer?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        //初始化播放器
        let url = URL(string: "http://www.hangge.com/music.mp3")
        playerItem = AVPlayerItem(url: url!)
        player = AVPlayer(playerItem: playerItem!)
        
        //设置进度条相关属性
        let duration : CMTime = playerItem!.asset.duration
        let seconds : Float64 = CMTimeGetSeconds(duration)
        playbackSlider!.minimumValue = 0
        playbackSlider!.maximumValue = Float(seconds)
        playbackSlider!.isContinuous = false
        
        //播放过程中动态改变进度条值和时间标签
        player!.addPeriodicTimeObserver(forInterval: CMTimeMakeWithSeconds(1, 1),
                                        queue: DispatchQueue.main) { (CMTime) -> Void in
            if self.player!.currentItem?.status == .readyToPlay {
                //更新进度条进度值
                let currentTime = CMTimeGetSeconds(self.player!.currentTime())
                self.playbackSlider!.value = Float(currentTime)
                
                //一个小算法，来实现00：00这种格式的播放时间
                let all:Int=Int(currentTime)
                let m:Int=all % 60
                let f:Int=Int(all/60)
                var time:String=""
                if f<10{
                    time="0\(f):"
                }else {
                    time="\(f)"
                }
                if m<10{
                    time+="0\(m)"
                }else {
                    time+="\(m)"
                }
                //更新播放时间
                self.playTime!.text=time
            }
        }
    }
    
    //播放按钮点击
    @IBAction func playButtonTapped(_ sender: Any) {
        //根据rate属性判断当天是否在播放
        if player?.rate == 0 {
            player!.play()
            playButton.setTitle("暂停", for: .normal)
        } else {
            player!.pause()
            playButton.setTitle("播放", for: .normal)
        }
    }
    
    //拖动进度条改变值时触发
    @IBAction func playbackSliderValueChanged(_ sender: Any) {
        let seconds : Int64 = Int64(playbackSlider.value)
        let targetTime:CMTime = CMTimeMake(seconds, 1)
        //播放器定位到对应的位置
        player!.seek(to: targetTime)
        //如果当前时暂停状态，则自动播放
        if player!.rate == 0
        {
            player?.play()
            playButton.setTitle("暂停", for: .normal)
        }
    }
    
    //页面显示时添加歌曲播放结束通知监听
    override func viewWillAppear(_ animated: Bool) {
        NotificationCenter.default.addObserver(self, selector: #selector(finishedPlaying),
               name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerItem)
    }
    
    //页面消失时取消歌曲播放结束通知监听
    override func viewWillDisappear(_ animated: Bool) {
        NotificationCenter.default.removeObserver(self)
    }
    
    //歌曲播放完毕
    @objc func finishedPlaying(myNotification:NSNotification) {
        print("播放完毕!")
        let stopedPlayerItem = myNotification.object as! AVPlayerItem
        stopedPlayerItem.seek(to: kCMTimeZero, completionHandler: nil)
        playButton.setTitle("播放", for: .normal)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}