我假设您使用的是PFQueryTableViewController，因为方法queryForTable属于该方法.指出查询已在进行中的错误是因为PFQTVC在后台触发了查询，因此在您的情况下无法进行findObjectsInBackgroundWithBlock回答.

I assume you are using a PFQueryTableViewController, as the method queryForTable belongs to that. The error stating that a query is already in progress is because the query is fired behind the scenes by the PFQTVC, so the answer asking to do a findObjectsInBackgroundWithBlock is not possible in your case.

使用此特殊的表视图控制器，还向cellForRowAtIndexPath传递了PFObject，这是与行匹配的对象.

With this special table view controller, the cellForRowAtIndexPath is also passed a PFObject, which is the object to matching the row.

要获取来自相关对象的城市名称，请在cellForRowAtIndexPath中使用以下代码:

To get the city name, which is from related object, you use this code in cellForRowAtIndexPath:

PFObject *city = object[@"origin-city"];
[cell.textLabel setText:city[@"name"]; // The name column from the City class