title: iOS Photos Framework: is it possible to access photos from "People" smart folder?
body: <p>I'm trying to access <code>PHAssetCollection</code>s from <code>PHCollectionList</code>. The main idea is to fetch all collections (and assets inside) from "People" smart folder on my iPhone (iOS 10.2). To fetch <code>PHCollectionList</code> I'm using current code:</p>
  
  <pre><code>PHFetchResult *listFetchResult = 
  [PHCollectionList fetchCollectionListsWithType:PHCollectionListTypeSmartFolder 
                                         subtype:PHCollectionListSubtypeSmartFolderFaces
                                         options:nil];
  PHCollectionList *list = listFetchResult[0];
  NSLog(@"title: %@",list.localizedTitle);
  </code></pre>
  
  <p>This works as expected. Console output: "title: People". <code>list.canContainAssets</code> returns <code>NO</code> and <code>list.canContainCollections</code> returns <code>YES</code>.<br>
  Then, I'm trying to fetch asset collections from <code>list</code>:</p>
  
  <pre><code>PHFetchResult *collectionFetchResult = 
  [PHCollection fetchCollectionsInCollectionList:list options:nil];
  </code></pre>
  
  <p><code>collectionFetchResult.count</code> always returns 0. But if I open Photos app i see 10 collections inside "People" folder.</p>
  
  <p>Is it possible to access collections (and photos inside them) from "People" smart album in Photos app? </p>