swift：在不知道他的 objectId 的情况下更新解析对象

Question

我有一个用户注册和登录系统，其中用户存储了他的电子邮件地址和密码。

稍后我想向该用户添加更多信息，因此我在 parse.com 上创建了一个名为“UserProfile”的新数据类，我在其中存储来自已注册用户的 userObjectId。

所以现在我想在数据类 UserProfile 中更新这个用户，但我现在只是来自 UserClass 中的用户的 objectId。 所以我想像“更新用户，其中 userObjectId = PFUser.currentUser().objectId”一样更新

我已经有了这个 sn-p 代码：

    var query = PFQuery(className:"UserProfiles")
    var userId = PFUser.currentUser()?.objectId?
    query.whereKey("userObjectId", equalTo: userId)
    //i don't think, that the following code is correct
    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()
        }
    }

Answer 1

假设您的“userObjectId”字段是字符串字段而不是指针字段，那么您可以这样做。

var query = PFQuery(className: "UserProfiles")
var userId = PFUser.currentUser()!.objectId

query.whereKey("userObjectId", equalTo: userId)
//here you would just find the results
query.findObjectsInBackgroundWithBlock {(objects: [AnyObject]?, error: NSError?) -> Void in
    if error == nil {
        //you have the user, assuming one but their could be more
        //this will only return one user since you're using the objectID as a field and those are unique, so...

        for user in objects! {
            user["aColumnYouWishToUpdate"] = whatYouWishToUpdateTo
            user["anotherColumnToUpdate"] = anotherUpdatedVariable
            //do this for any columns you want updated
            user.saveInBackground() //to save the newly updated user
        } 

    } else {
        //you have an error
    }
}