ios - 为当前用户更新解析对象而不是创建重复条目

Question

我正在尝试让用户更新他们的位置。当我尝试保存数据时，它会创建一个重复条目而不是更新旧信息。我有一个部署到 mongolabs 数据库的 heroku 解析服务器。

class DropLoc: UIViewController, CLLocationManagerDelegate { 

var user = PFUser.currentUser()
var post = PFObject(className:"Post")
var query = PFQuery(className:"Post")
var point:  PFGeoPoint!
let porta = CLLocationManager()


override func viewDidLoad() {
    super.viewDidLoad()


    var curGate = porta.location

    self.porta.delegate = self
    self.porta.desiredAccuracy = kCLLocationAccuracyBest
    self.porta.requestWhenInUseAuthorization()
    self.porta.startUpdatingLocation()
    point = PFGeoPoint(location: curGate)


    query.whereKey("user", equalTo: user!)
    query.findObjectsInBackgroundWithBlock {(objects: [PFObject]?, error: NSError?) -> Void in
        if error != nil {
            print(error)
        }else{
            self.post["user"] = self.user ?? NSNull()
            self.post["location"] = self.point ?? NSNull()
            self.post.saveInBackground()

        }
    }
}

Answer 1

看起来 point 只设置了一次。尝试从 CLLocationManagerDelegate 添加以下方法协议(protocol)。

func locationManager(manager: CLLocationManager, didUpdateToLocation newLocation: CLLocation, fromLocation oldLocation: CLLocation) {
        // updated coordinate
        point = PFGeoPoint(location: manager.location!)        
}