Quickblox iOS -请求对象，按'Created At'排序

Question

使用QuickBlox iOS框架检索自定义对象时，是否有办法获得由Created At字段从最新到最旧排序的结果?

NSMutableDictionary *getRequestFavs = [NSMutableDictionary dictionary];
[getRequest setObject:[NSString stringWithFormat:@"%lu", (unsigned long)currentUser.ID] forKey:@"favoriteID"];
// not sure what to do here...
[getRequest setObject:@"???" forKey:@"sort_desc"];
[QBRequest objectsWithClassName:@"Favorites" extendedRequest:getRequest successBlock:^(QBResponse *response, NSArray *objects, QBResponsePage *page) {       
} errorBlock:^(QBResponse *response) {
}];

Answer 1

对于遇到这种情况的任何人，我设法通过使用对象的ID字段排序来解决这个问题。它是索引的，并且比created_at字段快得多。

[getRequest setObject:@"_id" forKey:@"sort_desc"];