iphone - 艺术家专辑数量

Question

这就是我的问题=)

MPMediaQuery *artistQuery = [MPMediaQuery artistsQuery];
NSArray *songsByArtist = [artistQuery collections];

如何获取songByArtist 中 MPMediaItemCollections 中每位艺术家的专辑数量？

示例:

披头士乐队3 专辑

交流/直流6 专辑

谢谢!!

Answer 1

我使用谓词获取艺术家的专辑和歌曲数量:

MPMediaPropertyPredicate *artistNamePredicate = [MPMediaPropertyPredicate predicateWithValue:@"ArtistName" forProperty:MPMediaItemPropertyArtist];
MPMediaQuery *myComplexQuery = [[MPMediaQuery alloc] init];
[myComplexQuery addFilterPredicate: artistNamePredicate];
NSInteger songCount = [[myComplexQuery collections] count]; //number of songs
myComplexQuery.groupingType = MPMediaGroupingAlbum;
NSInteger albumCount = [[myComplexQuery collections] count]; //number of albums