1 //读取mp3里的信息 2     AudioFileID fileID; 3      4     AudioFileTypeID typeIdMP3 = kAudioFileMP3Type; 5      6     OSStatus status = noErr; 7     //读取mp3文件 8     status = AudioFileOpenURL((__bridge CFURLRef)fileURL, kAudioFileReadPermission, typeIdMP3, &fileID); 9     if (status != noErr) {10         NSLog(@"AudioFileOpenURL Failure");11     }12     13 //    ID3，一般是位于一个mp3文件的开头或末尾的若干字节内，附加了关于该mp3的歌手，标题，专辑名称，年代，风格等信息，该信息就被称为ID3信息，ID3信息分为两个版本，v1和v2版。 其中：v1版的ID3在mp3文件的末尾128字节，以TAG三个字符开头，后面跟上歌曲信息。 v2版一般位于mp3的开头，可以存储歌词，该专辑的图片等大容量的信息。14     UInt32 id3DataSize = 0;15     status = AudioFileGetPropertyInfo(fileID, kAudioFilePropertyID3Tag, &id3DataSize, NULL);16     if (status != noErr) {17         NSLog(@"读id3DataSize失败，没有附加信息");18     }19     NSLog(@"id3DataSize: %ld",id3DataSize);20     21     //唱片信息22     NSDictionary *propertyInfo = nil;23     UInt32 piDataSize = sizeof(propertyInfo);24     status = AudioFileGetProperty(fileID, kAudioFilePropertyInfoDictionary, &piDataSize, &propertyInfo);25     if (status != noErr) {26         NSLog(@"读取唱片信息失败");27     }28     NSLog(@"propertyInfo: %@",propertyInfo);29     30     31     32     //唱片封面 这里获取到的图片数据是空的，暂时不知道为什么，建议使用方法2，简单33     CFDataRef albumPic = nil;34     UInt32 albumPicDataSize = sizeof(albumPic);35     status = AudioFileGetProperty(fileID, kAudioFilePropertyAlbumArtwork, &albumPicDataSize, &albumPic);36     37     if (status != noErr) {38         NSLog(@"读取唱片封面失败");39     }40     //获取专辑名称41     NSString *album = propertyInfo[@"album"];42     NSString *artist = propertyInfo[@"artist"];43     NSString *title = propertyInfo[@"title"];44     NSString *year = propertyInfo[@"year"];45     CZMP3Info *mp3Info = [[CZMP3Info alloc] init];46 47     mp3Info.album = album;48     mp3Info.artist = artist;49     mp3Info.title = title;50     mp3Info.year = year;51     mp3Info.albumArtwork = (__bridge NSData *)albumPic;

 1 AVURLAsset *assest = [AVURLAsset URLAssetWithURL:fileURL options:nil]; 2      3     CZMP3Info *mp3Info = [[CZMP3Info alloc] init]; 4     NSLog(@"%@",assest.lyrics); 5     for (NSString *key in [assest availableMetadataFormats]) { 6         for (AVMetadataItem *item in [assest metadataForFormat:key]) { 7             NSString *commonKey = item.commonKey; 8              9             if ([commonKey isEqualToString:@"artist"]) {//歌手10                 mp3Info.artist = (NSString *)item.value;11             }else if([commonKey isEqualToString:@"albumName"]){//专辑名称12                 mp3Info.album = (NSString *)item.value;13             }else if([commonKey isEqualToString:@"title"]){//歌曲名14                 mp3Info.title = (NSString *)item.value;15             }else if ([commonKey isEqualToString:@"artwork"]){16                 NSDictionary *artworkDict = (NSDictionary *)item.value;17                 NSData *image = [artworkDict objectForKey:@"data"];18                 mp3Info.albumArtwork = image;19             }20         }21     }22     23     CMTime durationTime = assest.duration;24     CGFloat duration = CMTimeGetSeconds(durationTime);