从apple music“音乐”里面导出音乐列表

1.引入头文件

<MediaPlayer/MediaPlayer.h>

2.获取音乐列表

// 创建媒体选择队列

    MPMediaQuery *query = [[MPMediaQuery alloc] init];

    // 创建读取条件

    MPMediaPropertyPredicate *albumNamePredicate = [MPMediaPropertyPredicate predicateWithValue:[NSNumber numberWithInt:MPMediaTypeMusic] forProperty:MPMediaItemPropertyMediaType];

    // 给队列添加读取条件

    [queryaddFilterPredicate:albumNamePredicate];

    // 从队列中获取条件的数组集合

    NSArray*itemsFromGenericQuery = [queryitems];

    // 遍历解析数据

    NSMutableArray *musicAry = [[NSMutableArray alloc] init];

    for(MPMediaItem*musicinitemsFromGenericQuery) {

         [selfresolverMediaItem:music];

    }

3.通过music获取歌曲信息和下载在本地的歌曲地址

NSMutableDictionary *musicInfoJson = [NSMutableDictionary dictionary];

    NSString *songID = [music valueForProperty:MPMediaItemPropertyPersistentID];//歌曲编号

    NSString *songTitle = [music valueForProperty:MPMediaItemPropertyTitle];//歌曲名称

    NSString *albumName = [music valueForProperty:MPMediaItemPropertyAlbumTitle];//专辑名称

    NSString *artistName = [music valueForProperty:MPMediaItemPropertyArtist];//歌手名称

    NSURL *fileUrl = [music valueForProperty:MPMediaItemPropertyAssetURL];//文件路径

    NSNumber *duration = [music valueForProperty:MPMediaItemPropertyPlaybackDuration];//歌曲时长

    MPMediaItemArtwork *artwork = [music valueForProperty:MPMediaItemPropertyArtwork];//封面图片

    UIImage*artworkImg;

    NSString*artworkImgStr =@"";

    if(artwork){

        artworkImg = [artworkimageWithSize:CGSizeMake(72,72)];

    }

    NSString*filePath = [fileUrlabsoluteString];//文件路径

3.导出music到沙盒路径

NSString * appDir = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];

    NSString*newPath = [appDirstringByAppendingFormat:@"/345.mov"];

    NSURL*outputUrl = [NSURLfileURLWithPath:newPath];

    AVAsset*asset = [AVAssetassetWithURL:music.assetURL];

    AVAssetExportSession *session =[[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetPassthrough];

    session.outputURL= [NSURLfileURLWithPath:newPath];

    session.outputFileType = AVFileTypeCoreAudioFormat;

    session.metadata= asset.metadata;

    [sessionexportAsynchronouslyWithCompletionHandler:^{

        //判断导出状态

        switch(session.status) {

            case AVAssetExportSessionStatusCompleted:{

                //导出完成

                NSLog(@"导出成功 %@",outputUrl.absoluteString);

                NSString *newPath1 = [[newPath stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"543.mp3"];

                NSError*renameError =nil;

                [[NSFileManagerdefaultManager]moveItemAtPath:newPathtoPath:newPath1error:&renameError];

                if(renameError) {

                    NSLog(@"renameError=%@",renameError.localizedDescription);

                }else{

                    NSLog (@" No renameError(Success) :: newPath=%@",newPath1);

                    self.podFilePath= newPath1;

                }

                [[NSFileManager defaultManager] removeItemAtPath:newPath error:nil];

            }

                break;

            case AVAssetExportSessionStatusFailed:{

                //导出失败

                NSLog(@"导出错误 %@",session.error);

            }

                break;

            default:

                break;

            }

    }];

需要注意导出的时候需要指定成mov类型的问题，不然会导出失败