最近做音頻合成,看了百度很多的音頻后臺,但不是自己想要的效果.于是google加官方文檔,實現(xiàn)了自己想要的東西.

特此記錄一下.與有同需求的朋友分享一下.

目的功能主要是音頻能后臺?程序啟動不中斷ipod能與ipod混音

轉(zhuǎn)載請保留出處:http://blog.csdn.net/fightper/article/details/7516876

關(guān)鍵代碼:

?

AudioSessionInitialize?(NULL,NULL,NULL,NULL);//初始化音頻

UInt32?sessionCategory =kAudioSessionCategory_MediaPlayback;//設(shè)置后臺播放

AudioSessionSetProperty?(kAudioSessionProperty_AudioCategory,sizeof?(sessionCategory), &sessionCategory);

UInt32?allowMixWithOthers =true;//設(shè)置是否與ipod混合(與ipod聲音一樣大)

AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryMixWithOthers,sizeof(allowMixWithOthers), &allowMixWithOthers);

UInt32?allowAudioShouldDuck =true;//設(shè)置是否與ipod混合(ipod聲音變小,應(yīng)用程序聲音變大)

AudioSessionSetProperty(kAudioSessionProperty_OtherMixableAudioShouldDuck,sizeof(allowAudioShouldDuck), &allowAudioShouldDuck);

AudioSessionSetActive(true);//激活audiosession

?

/*調(diào)用高級類設(shè)置方法

?[[AVAudioSession sharedInstance] setActive:YES error: nil];

?[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error:nil];

?//調(diào)用遠程播放控件

?[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];

?*/

?

?

//系統(tǒng)提示音調(diào)用?

staticvoid?completionCallback (SystemSoundID? soundID,void* aa) {}

musicID =?0;

SystemSoundID?soundID;

NSString?*path = [[NSBundlemainBundle]pathForResource:@"tishi"ofType:@"aif"]; ? ?

CFURLRef?soundURL = (CFURLRef)[NSURLfileURLWithPath:path];

AudioServicesCreateSystemSoundID(soundURL,&soundID);

AudioServicesPlaySystemSound?(kSystemSoundID_Vibrate);

AudioServicesAddSystemSoundCompletion(soundID,NULL,NULL,completionCallback,(void?*)musicID);

AudioServicesPlayAlertSound(soundID);

原文連接：http://blog.csdn.net/fightper/article/details/7516876

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