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我要的音视频文章 MPMoviePlayerViewController VS MPMoviePlayerController AVAudioPlayer MPMusicPlayerControll

发布时间:2016-12-5 2:27:30 编辑:www.fx114.net 分享查询网我要评论
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http://www.cnblogs.com/pengyingh/articles/2383466.html 音频视频 原文地址:音频视频作者:家明 视频播放 MediaPlayer.framework MPMoviePlayerViewController VS MPMoviePlayerController     MPMoviePlayerViewController MPMoviePlayerController 版本支持 Available in iOS 3.2 and later. Available in iOS 2.0 and later.(多数属性支持3.2后) 大小 只支持全屏播放  如果addsubview 不支持横竖屏 可全屏也可自己设置frame 调用 presentMoviePlayerViewControllerAnimated:    dismissMoviePlayerViewControllerAnimated addsubview: 属性 moviePlayer [mMPVC. moviePlayer play];     BOOL shouldAutoplay NSTimInterval initialPlaybackTime   NSTimeInterval duration MPMovieControlStyle controlStyle 函数   initWithContentURL   shouldAutorotateToInterfaceOrientation   initWithContentURL   requestThumbnailImagesAtTimes:timeOption   thumbnailImageAtTime:timeOption   timedMetadata (4.0) notification MPMoviePlayerPlaybackDidFinishNotification 播放完成   MPMovieMediaTypesAvailableNotification 视频开始播放 (载入完成)   MPMoviePlayerNowPlayingMovieDidChangeNotification 视频开播 (开始载入)   MPMoviePlayerPlaybackStateDidChangeNotification 播放状态变化 判断 mediaPlayer.playbackState   MPMoviePlayerDidEnterFullscreenNotification 全屏 相关       另外 UIWebview播放方式 方便 但是对一些视频不支持 经测试有的流媒体的 使用 MPMoviePlayerController 可以播放 但 UIWebview不支持.   因 MPMoviePlayerController 为单例4.0之后 可使用 AVPlayerLayer 的播放方式 addSubLayer实现多个视频同时播放 player1 = [AVPlayer playerWithURL:[NSURL fileURLWithPath:moviePath]];      player1.actionAtItemEnd = AVPlayerActionAtItemEndNone;      [[NSNotificationCenter defaultCenter] addObserver:self                                                           selector:@selector(playerItemDidReachEnd:)                                                                name:AVPlayerItemDidPlayToEndTimeNotification                                                             object:[player1 currentItem]];      [player1 play];   playerLayer1 = [AVPlayerLayer playerLayerWithPlayer:player1];      playerLayer1.frame = self.bounds;                  [self.layer addSublayer:playerLayer1];     参考: MPMoviePlayerViewController http://developer.apple.com/library/ios/#documentation/mediaplayer/reference/mpmovieplayerviewcontroller_class/Reference/Reference.html MPMoviePlayerController http://developer.apple.com/library/ios/#documentation/mediaplayer/reference/MPMoviePlayerController_Class/Reference/Reference.html     音频播放 AVFoundation.framework     System Sound Services AVAudioPlayer 类 MPMusicPlayerController 特点 播放短音效 播放任意长度音频 播放本地ipod音乐 版本 ios 2.0 or later ios 2.2 or later   ios 3.0 later 属性   playing,duration,currentTime, repeatMode,currentPlaybackTime, numberOfLoops 常用方法: AudioServicesCreateSy stemSoundID(CFURLR inFileURL, SystemSoundID *outSystemSoundID)   AudioServicesPlay SystemSound(SystemSoundID inSystemSoundID) - (id)initWithContentsOfURL:(NSURL *)url error:(NSError*)outError;   -  (id)initWithData:(NSData *)dataerror:(NSError *)outError;   -  (BOOL)play; -  (void)pause; - (void)stop; applicationMusicPlayer;   -  (void)setQueueWithQuery:(MPMediaQuery *)query;   -(void)play; -(void)pause; -(void)stop;   一 各个播放器初始化方法: 1 System Sound Services // 创建路径 NSString*dropMusicPath = [[NSBundle mainBundle] pathForResource:@"bird drop" ofType:@"wav"]; CFURLRefdropURL = (CFURLRef)[NSURL fileURLWithPath:dropMusicPath];   //创建系统声音 AudioServicesCreateSystemSoundID(dropURL, &birdDropID);   //播放音效 AudioServicesPlaySystemSound(birdDropID);   2 AVAudioPlayer 类   // 设置音乐文件路径       path = [[NSBundle mainBundle] pathForResource:@"InTheMood" ofType:@"mp3"];          // 设置 player    url为本地音频文件路径  player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:&error];   在线播放用data初始化 player = [[AVAudioPlayer alloc] initWithData:receiveData error:&err];    [player play];   3 MPMusicPlayerController     player = [MPMusicPlayerController applicationMusicPlayer];   MPMediaItemCollection *_mediaCollection = [[MPMediaItemCollection alloc]initWithItems:SongList]; self.mediaCollection = _mediaCollection; [_mediaCollection release];   [player setQueueWithItemCollection:mediaCollection]; [player setRepeatMode:MPMusicRepeatModeAll];   [player play];     二 音频后台播放:   (1) 设置 AVAudioSession 属性支持 NSError * err; AVAudioSession*audioSession;  audioSession = [AVAudioSession sharedInstance];  [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];  [audioSession setActive:YES error:nil];   (2)  设置工程文件plist属性 三 系统后台控制音频播放     (1)  重写方法 canBecomeFirstResponder 返回YES   - (BOOL)canBecomeFirstResponder {     return YES; }   - (void)viewDidLoad {     [super viewDidLoad];     [self canBecomeFirstResponder]; }   (2) 实现接收RemoteControlEvents方法   - (void)viewDidAppear:(BOOL)animated {       [super viewDidAppear:animated];     [self becomeFirstResponder];     [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];   }   - (void)viewWillDisappear:(BOOL)animated {         [super viewWillDisappear:animated];     [[UIApplication sharedApplication] endReceivingRemoteControlEvents];     [self resignFirstResponder];     }   (3)  在回调方法做相应处理   - (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {         if (receivedEvent.type == UIEventTypeRemoteControl)     {         switch (receivedEvent.subtype)      {             case UIEventSubtypeRemoteControlTogglePlayPause:                                                          break;      case UIEventSubtypeRemoteControlPlay:           break;      case UIEventSubtypeRemoteControlPause:           break;            case UIEventSubtypeRemoteControlPreviousTrack:                      break;            case UIEventSubtypeRemoteControlNextTrack:                 break;             default:                 break;         }     } }

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