プレイリストを除くアプリのすべての部分について、iCloud 内のすべてのアイテムを正常に除外しました。プレイリストのリストを表示すると、各セル内にそのプレイリスト内のトラック数を読み取るサブヘッダーがあります。問題は、コレクション内のアイテムの数が正しくないことです (クエリ自体のアイテムの総数は正しいにもかかわらず)。
コード:
MPMediaPropertyPredicate *predicate = [MPMediaPropertyPredicate predicateWithValue:[NSNumber numberWithBool:0] forProperty:MPMediaItemPropertyIsCloudItem comparisonType:MPMediaPredicateComparisonEqualTo];
MPMediaQuery *query = [MPMediaQuery playlistsQuery];
[query addFilterPredicate:predicate];
NSLog(@"(iCloud) Total number of items in query: %d",query.items.count);
int i=1;
for (MPMediaItemCollection *collection in query.collections) {
NSLog(@"(iCloud) Number of items in playlist %d: %d",i,collection.items.count);
i++;
}
MPMediaQuery *query2 = [MPMediaQuery playlistsQuery];
NSLog(@"(All) Total number of items in query: %d",query2.items.count);
i=0;
for (MPMediaItemCollection *collection in query2.collections) {
NSLog(@"(All) Number of items in playlist %d: %d",i,collection.items.count);
i++;
}
ログ:
2013-02-16 20:46:08.904 MyApp[62357:907] (iCloud) Total number of items in query: 99
2013-02-16 20:46:08.918 MyApp[62357:907] (iCloud) Number of items in playlist 1: 5
2013-02-16 20:46:08.924 MyApp[62357:907] (iCloud) Number of items in playlist 2: 1
2013-02-16 20:46:08.930 MyApp[62357:907] (iCloud) Number of items in playlist 3: 19
2013-02-16 20:46:08.950 MyApp[62357:907] (iCloud) Number of items in playlist 4: 312
2013-02-16 20:46:08.956 MyApp[62357:907] (iCloud) Number of items in playlist 5: 5
2013-02-16 20:46:08.963 MyApp[62357:907] (iCloud) Number of items in playlist 6: 44
2013-02-16 20:46:09.003 MyApp[62357:907] (iCloud) Number of items in playlist 7: 16
2013-02-16 20:46:09.009 MyApp[62357:907] (iCloud) Number of items in playlist 8: 31
2013-02-16 20:46:09.015 MyApp[62357:907] (iCloud) Number of items in playlist 9: 90
2013-02-16 20:46:09.023 MyApp[62357:907] (iCloud) Number of items in playlist 10: 42
2013-02-16 20:46:09.069 MyApp[62357:907] (iCloud) Number of items in playlist 11: 296
2013-02-16 20:46:09.074 MyApp[62357:907] (iCloud) Number of items in playlist 12: 2
2013-02-16 20:46:09.134 MyApp[62357:907] (iCloud) Number of items in playlist 13: 25
2013-02-16 20:46:09.139 MyApp[62357:907] (iCloud) Number of items in playlist 14: 4
2013-02-16 20:46:09.143 MyApp[62357:907] (iCloud) Number of items in playlist 15: 1
2013-02-16 20:46:09.147 MyApp[62357:907] (iCloud) Number of items in playlist 16: 3
2013-02-16 20:46:09.153 MyApp[62357:907] (iCloud) Number of items in playlist 17: 19
2013-02-16 20:46:09.158 MyApp[62357:907] (iCloud) Number of items in playlist 18: 5
2013-02-16 20:46:09.162 MyApp[62357:907] (iCloud) Number of items in playlist 19: 7
2013-02-16 20:46:09.167 MyApp[62357:907] (iCloud) Number of items in playlist 20: 14
2013-02-16 20:46:09.177 MyApp[62357:907] (iCloud) Number of items in playlist 21: 247
2013-02-16 20:46:09.182 MyApp[62357:907] (iCloud) Number of items in playlist 22: 12
2013-02-16 20:46:09.186 MyApp[62357:907] (iCloud) Number of items in playlist 23: 2
2013-02-16 20:46:09.191 MyApp[62357:907] (iCloud) Number of items in playlist 24: 5
2013-02-16 20:46:09.195 MyApp[62357:907] (iCloud) Number of items in playlist 25: 2
2013-02-16 20:46:09.199 MyApp[62357:907] (iCloud) Number of items in playlist 26: 5
2013-02-16 20:46:09.213 MyApp[62357:907] (iCloud) Number of items in playlist 27: 239
2013-02-16 20:46:09.218 MyApp[62357:907] (iCloud) Number of items in playlist 28: 11
2013-02-16 20:46:09.265 MyApp[62357:907] (All) Total number of items in query: 3788
2013-02-16 20:46:09.269 MyApp[62357:907] (All) Number of items in playlist 0: 5
2013-02-16 20:46:09.270 MyApp[62357:907] (All) Number of items in playlist 1: 1
2013-02-16 20:46:09.271 MyApp[62357:907] (All) Number of items in playlist 2: 19
2013-02-16 20:46:09.272 MyApp[62357:907] (All) Number of items in playlist 3: 312
2013-02-16 20:46:09.272 MyApp[62357:907] (All) Number of items in playlist 4: 5
2013-02-16 20:46:09.273 MyApp[62357:907] (All) Number of items in playlist 5: 44
2013-02-16 20:46:09.274 MyApp[62357:907] (All) Number of items in playlist 6: 16
2013-02-16 20:46:09.275 MyApp[62357:907] (All) Number of items in playlist 7: 31
2013-02-16 20:46:09.275 MyApp[62357:907] (All) Number of items in playlist 8: 90
2013-02-16 20:46:09.276 MyApp[62357:907] (All) Number of items in playlist 9: 42
2013-02-16 20:46:09.277 MyApp[62357:907] (All) Number of items in playlist 10: 296
2013-02-16 20:46:09.277 MyApp[62357:907] (All) Number of items in playlist 11: 2
2013-02-16 20:46:09.278 MyApp[62357:907] (All) Number of items in playlist 12: 25
2013-02-16 20:46:09.279 MyApp[62357:907] (All) Number of items in playlist 13: 4
2013-02-16 20:46:09.279 MyApp[62357:907] (All) Number of items in playlist 14: 1
2013-02-16 20:46:09.280 MyApp[62357:907] (All) Number of items in playlist 15: 3
2013-02-16 20:46:09.281 MyApp[62357:907] (All) Number of items in playlist 16: 19
2013-02-16 20:46:09.282 MyApp[62357:907] (All) Number of items in playlist 17: 5
2013-02-16 20:46:09.283 MyApp[62357:907] (All) Number of items in playlist 18: 7
2013-02-16 20:46:09.284 MyApp[62357:907] (All) Number of items in playlist 19: 14
2013-02-16 20:46:09.284 MyApp[62357:907] (All) Number of items in playlist 20: 247
2013-02-16 20:46:09.285 MyApp[62357:907] (All) Number of items in playlist 21: 12
2013-02-16 20:46:09.286 MyApp[62357:907] (All) Number of items in playlist 22: 2
2013-02-16 20:46:09.286 MyApp[62357:907] (All) Number of items in playlist 23: 5
2013-02-16 20:46:09.287 MyApp[62357:907] (All) Number of items in playlist 24: 2
2013-02-16 20:46:09.288 MyApp[62357:907] (All) Number of items in playlist 25: 5
2013-02-16 20:46:09.288 MyApp[62357:907] (All) Number of items in playlist 26: 239
2013-02-16 20:46:09.289 MyApp[62357:907] (All) Number of items in playlist 27: 11