ios - 解析查询不显示最新数据

Question

import UIKit
import Parse

class loadMainViewController: UIViewController {

    //create new pfQuery - This is the bridge between our app and Parse: "trivia" is our class name on Parse
    let queryTrivia: PFQuery = PFQuery(className:"trivia")

    @IBOutlet weak var label1: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        //retrieve data from parse query
        retrieveTrivia()  
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func retrieveTrivia() {

        //This CLOSURE gives access to all objects in "trivia" class using our queryTrivia Bridge
        queryTrivia.findObjectsInBackgroundWithBlock { (objects:[PFObject]?, error:NSError?) -> Void in
        if( error == nil ){

            print("error is nil")
        }
            var didLoad = true

            // Loop through the objects array
            for triviaObject in objects!{

                // Retrieve data for each object (key, question, ans2, ans3, correctAns)
                let triviaQuest : String? = (triviaObject as PFObject)["question"] as? String
                let triviaAns2 : String? = (triviaObject as PFObject)["ans2"] as? String
                let triviaAns3 : String? = (triviaObject as PFObject)["ans3"] as? String
                let triviaAns : String? = (triviaObject as PFObject)["correctAns"] as? String
                let triviaKey : Int? = (triviaObject as PFObject)["key"] as? Int

                //Check that items are not nil, and create trivia object, add to triviaQuestions Array
                if ( triviaKey != nil && triviaQuest != nil && triviaAns2 != nil &&  triviaAns3 != nil && triviaAns != nil){
                    let trivia = triviaQuestion(Key: triviaKey!, Question: triviaQuest!, Answer: triviaAns!, WrongAnswer:  triviaAns2!, WrongAnswer2:  triviaAns3!)
                    triviaQuestions.append(trivia) // append to the global array of trivia questions

                }else{
                    self.label1.text = "Network Error"
                    didLoad = false
                }   
            }

            for element in triviaQuestions{
                print(element.Key)
            }

            if (didLoad == true) {
                //perform segue to View Controller : Main menu
                self.performSegueWithIdentifier("finnishLoad", sender: self)
            }    
        }     
    }
}

我的问题在于当我在retrieveTrivia()方法中查询数据时。这些查询似乎可以解决一些问题。保存到 TriviaQuestion、TriviaAns、TriviaAns2、TriviaAns3 中的数据是旧数据，此后我使用解析网站更改了这些数据，只需单击单元格并手动编辑每个字段即可。此外，我似乎无法获取关键字段，并且它总是返回为零。

当我运行这个时，triviaAns 变量包含“Cow”，但是，在线查看数据时它显示“Mozzarella”。

知道为什么我在更新字段后会收到错误的数据以及为什么关键字段返回为零吗？

这是数据现在的样子 enter image description here

Answer 1

确保您连接到正确的 Parse 应用 - 检查应用委托(delegate)中对 setApplicationId:clientKey 的调用中的键是否与 Parse.com 上应用设置中显示的键匹配