如何让AudioToolbox MusicTrack在iOS 9.0中循环?
此代码在iOS 8.4中循环MusicTrack时运行良好,但在使用MusicLayerSetSequence设置序列时,将在iOS 9.0下停止应用程序如何让AudioToolbox MusicTrack在iOS 9.0中循环?,ios,loops,ios9,audiotoolbox,Ios,Loops,Ios9,Audiotoolbox,此代码在iOS 8.4中循环MusicTrack时运行良好,但在使用MusicLayerSetSequence设置序列时,将在iOS 9.0下停止应用程序 var loopInfo = MusicTrackLoopInfo(loopDuration: 1.0,numberOfLoops: 0) MusicTrackSetProperty(track, UInt32(kSequenceTrackProperty_LoopInfo), &loopInfo, UInt3
var loopInfo = MusicTrackLoopInfo(loopDuration: 1.0,numberOfLoops: 0)
MusicTrackSetProperty(track, UInt32(kSequenceTrackProperty_LoopInfo), &loopInfo, UInt32(sizeofValue(loopInfo)))
在iOS 9中,还有其他方法可以让曲目循环吗?其他人也有类似的问题:当前解决方案的总体思路是在播放标记到达曲目末尾后将其设置回0 例如,在启动音乐播放器时使用以下方法:
MusicTrack track = NULL;
MusicTimeStamp trackLen = 0;
UInt32 trackLenLen = sizeof(trackLen);
//Get main track
MusicSequenceGetIndTrack(musicSequence, 0, &track);
//Get length of track
MusicTrackGetProperty(track, kSequenceTrackProperty_TrackLength, &trackLen, &trackLenLen);
//Create UserData for User Event with any data
static MusicEventUserData userData = {1, 0x09};
//Put new user event at the end of the track
MusicTrackNewUserEvent(track, trackLen, &userData);
//Set a callback for when User Events occur
MusicSequenceSetUserCallback(musicSequence, sequenceUserCallback, musicPlayer);
然后你可以有一个回调函数:
static void sequenceUserCallback(void *inClientData,
MusicSequence inSequence,
MusicTrack inTrack,
MusicTimeStamp inEventTime,
const MusicEventUserData *inEventData,
MusicTimeStamp inStartSliceBeat,
MusicTimeStamp inEndSliceBeat)
{
[[NSOperationQueue mainQueue] addOperationWithBlock:^ {
MusicPlayerSetTime((MusicPlayer) inClientData, 0.0);
}];
}
这将使播放机返回到零。谢谢,我也在关注这条线索。不过,你建议的变通办法对我没有帮助。我在我的应用程序中使用循环来计时节拍器-因此没有循环就没有计时。我现在正在寻找一个工作循环,因此如果我发现一些有用的东西,我会发布它,我们会看看它是否对你也有帮助。我已经添加了对我有用的东西,如果它对你也有用,请告诉我。