IOS音频视频

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:	AudioServicesCreateSystemSoundID(CFURLRef                    inFileURL,                                  SystemSoundID     *outSystemSoundID) AudioServicesPlaySystemSound(SystemSoundID inSystemSoundID)	- (id)initWithContentsOfURL:(NSURL *)url error:(NSError *)outError; -  (id)initWithData:(NSData *)data error:(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;

}

}

}