Swift

使用MPMoviePlayerController我们可以是进行音乐播放，下面是一个播放器样例。同时，播放时还可以显示播放时间和播放进度。

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import UIKit import MediaPlayer   class ViewController: UIViewController {           //申明一个媒体播放控件     var audioPlayer:MPMoviePlayerController=MPMoviePlayerController();     //申明一个计时器     var timer:NSTimer?           //ProgressView控件 播放进度条     @IBOutlet weak var progressView: UIProgressView!     //Label控件 播放时间     @IBOutlet weak var playTime: UILabel!          override func viewDidLoad() {         super.viewDidLoad()                   onSetAudio("http://hangge.com/file/music.mp3")     }       override func didReceiveMemoryWarning() {         super.didReceiveMemoryWarning()     }           //播放歌曲     func onSetAudio(url:String){         //暂停当前歌曲的播放         self.audioPlayer.stop()         //获取歌曲文件         self.audioPlayer.contentURL=NSURL(string:url)         //播放歌曲         self.audioPlayer.play()         //先停掉计时器         timer?.invalidate()         //将计时器归零         playTime!.text="00:00"         //开启计时器         timer=NSTimer.scheduledTimerWithTimeInterval(0.4, target: self,             selector: "onUpdate", userInfo: nil, repeats: true)     }           //计时器更新方法     func onUpdate(){         //返回播放器当前的播放时间         let c=audioPlayer.currentPlaybackTime         if c>0.0 {             //歌曲的总时间             let t=audioPlayer.duration             //歌曲播放的百分比             let p:CFloat=CFloat(c/t)             //通过百分比设置进度条             progressView!.setProgress(p, animated: true)                           //一个小算法，来实现00：00这种格式的播放时间             let all:Int=Int(c)             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             playTime!.text=time         }     } }