获取 PFUser 的用户名（Parse.com）

Question

我正在尝试获取 PFUser 的用户名。下面的代码在没有这一行的情况下工作：var username = nameId.username as String 但是当它被添加时，集合视图不显示任何结果。 有什么想法吗？

var query = PFQuery(className:"Chat")
    //        query.whereKey("user", equalTo:currentUser)
    query.whereKey("rideId", equalTo:currentObjectId)
    query.orderByAscending("createdAt")

    query.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]!, error: NSError!) -> Void in
        if error == nil {
            // The find succeeded.
            NSLog("Successfully retrieved \(objects.count) scores.")
            // Do something with the found objects
            for object in objects {
                NSLog("%@", object.objectId)

                var testId = object.objectId

                println(testId)

                self.orderedIdArray.append(testId)

                var message = object.objectForKey("message") as String
                self.messageString = message
                self.messageArray.append(self.messageString)
                println(message)

                var nameId = object.objectForKey("user") as PFUser
                var username = nameId.username as String
                self.nameString = username
                self.namesArray.append(self.nameString)

                self.collectionView?.reloadData()

            }

        } else {
            // Log details of the failure
            NSLog("Error: %@ %@", error, error.userInfo!)
        }

    }

Answer 1

它现在正在使用这条线：

query.includeKey("user")