如何分組PFObject？ Parse / Swift

Question

嗨，我正在嘗試分組PFObjects 。
例如，考慮一個消息傳遞應用程序 。

如何按傳入和傳出消息的用戶名進行分組？

這就是我所擁有的：

var messages = [PFObject]()

func loadMessages() {
    let query = PFQuery(className: "Messages")
    query.whereKey("user", equalTo: PFUser.current()!)
    query.includeKey("user")
    query.findObjectsInBackground { (objects, error) in
        if error == nil {

            for object in objects! {
                self.messages.append(object)
            }

        } else {
            print(error!.localizedDescription)
        }
    }
}

Answer 1

沒有內置功能，你必須自己做，例如當你想要決定該消息的圖像應該是Incomming還是Outgoing ...

for object in messages {
   if object["user_id"] as PFUser == PFUser.currentUser() {
       //the message is from the same User, set what you need
       //user_id is a column name in Messages as a pointer to User class class
   } else {
       // message was not send from currentUser
   }
}