Cocoa：如何获取音乐文件的Disc Number标签？

Question

现在，我可以从音频文件获得这些标签：

#define kAFInfoDictionary_Artist      "artist" 
#define kAFInfoDictionary_Album       "album" 
#define kAFInfoDictionary_Tempo       "tempo" 
#define kAFInfoDictionary_KeySignature     "key signature" 
#define kAFInfoDictionary_TimeSignature     "time signature" 
#define kAFInfoDictionary_TrackNumber     "track number" 
#define kAFInfoDictionary_Year       "year" 
#define kAFInfoDictionary_Composer      "composer" 
#define kAFInfoDictionary_Lyricist      "lyricist" 
#define kAFInfoDictionary_Genre       "genre" 
#define kAFInfoDictionary_Title       "title" 
#define kAFInfoDictionary_RecordedDate     "recorded date" 
#define kAFInfoDictionary_Comments      "comments" 
#define kAFInfoDictionary_Copyright      "copyright" 
#define kAFInfoDictionary_SourceEncoder     "source encoder" 
#define kAFInfoDictionary_EncodingApplication   "encoding application" 
#define kAFInfoDictionary_NominalBitRate    "nominal bit rate" 
#define kAFInfoDictionary_ChannelLayout     "channel layout" 
#define kAFInfoDictionary_ApproximateDurationInSeconds "approximate duration in seconds" 
#define kAFInfoDictionary_SourceBitDepth    "source bit depth" 
#define kAFInfoDictionary_ISRC       "ISRC"     // International Standard Recording Code 
#define kAFInfoDictionary_SubTitle      "subtitle" 

所以，我怎么可以得到光盘号标记？谢谢！

Answer 1

你可以尝试使用标签库：http://taglib.github.io/

它是免费的，功能强大。