Question

在我的应用中我试图在每次创建活动时给用户点数。我正在设置一个PFQuery来检索当前分数，然后将所需的点数保存回课堂。我的问题是，一旦创建了分数，我就无法更新分数，所以我需要一种方法来更新＆＃34;添加得分的当前得分数据这是我的代码：

// Give the User Points

    let saveScore = PFUser.currentUser()

    var query = PFQuery(className:"User")
    query.whereKey("score", equalTo: saveScore!)
    query.findObjectsInBackgroundWithBlock ({
        objects, error in

        if error == nil {
            // The find succeeded.
            println("Successfully retrieved \(objects!.count) scores.")
            // Do something with the found objects
            if let objects = objects as? [PFObject] {
                for object in objects {

                    let Score = object["score"] as! String

                    println(object.objectId)

                    let Points = ("100" + Score)


                    saveScore!.setObject(Points, forKey: "score")

                    saveScore!.saveInBackgroundWithBlock { (success: Bool,error: NSError?) -> Void in
                        println("Score added to User.");

                    }
                }
            }
        } else {
            // Log details of the failure
            println("Error: \(error!) \(error!.userInfo!)")
        }
    })

有人可以帮忙吗？感谢

Answer 1

由于您已经拥有当前用户，因此没有理由对其进行查询。但是，如果需要，您应该获取它以确保您使用最新数据。获取后，设置您的分数变量，添加100个字符串，然后保存更新的分数变量，如下所示：

if let currentUser = PFUser.currentUser() {

        currentUser.fetchIfNeededInBackgroundWithBlock({ (foundUser: PFObject?, error: NSError?) -> Void in

            // Get and update score

            if foundUser != nil {

                let score = foundUser!["score"] as! String

                let points = "100" + score

                foundUser!["score"] = points

                foundUser?.saveInBackgroundWithBlock({ (succeeded: Bool, error: NSError?) -> Void in

                    if succeeded {

                        println("score added to user")
                    }
                })

            }

        })

    }

Answer 2

您需要查询已保存的对象，然后像平常一样保存。它会像这样更新：

 var query = PFQuery(className:"GameScore")
 query.getObjectInBackgroundWithId("xWMyZEGZ") {
 (gameScore: PFObject?, error: NSError?) -> Void in
 if error != nil {
 println(error)
 } else if let gameScore = gameScore {
 gameScore["cheatMode"] = true
 gameScore["score"] = 1338
 gameScore.saveInBackground()
 }
}

将数据添加到Parse类中的当前数据

2 个答案: