在CloudKit CLLocations中未删除Pin注释

Question

我希望图钉出现在地图上，注释位于存储在cloudkit中的位置。正在保存和查询记录，但屏幕上没有任何内容。当您最初创建活动时，它会显示在屏幕上，直到应用重新启动。

@IBAction func makeEvent(sender: UIButton)
    {
        var title2 = String()
        let alertController = UIAlertController(title: "Event?", message: "Please name your event:", preferredStyle: .Alert)
        let confirmAction = UIAlertAction(title: "Confirm", style: .Default) { (_) in
            if let field = alertController.textFields![0] as? UITextField {
                NSUserDefaults.standardUserDefaults().setObject(field.text, forKey: "userEvent")
                NSUserDefaults.standardUserDefaults().synchronize()
                let center = CLLocationCoordinate2D(latitude: self.loc1.coordinate.latitude, longitude: self.loc1.coordinate.longitude)
                let lat: CLLocationDegrees = center.latitude
                let long: CLLocationDegrees = center.longitude
                self.pointAnnotation1 = MKPointAnnotation()
                self.pointAnnotation1.title = (field.text)
                title2 = field.text!
                self.pointAnnotation1.coordinate = CLLocationCoordinate2D(latitude: lat, longitude: long)
                self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation1, reuseIdentifier: nil)
                self.mapView?.centerCoordinate = self.pointAnnotation1.coordinate
                self.mapView.addAnnotation(self.pinAnnotationView.annotation!)
                let center1 = CLLocation(latitude: self.loc1.coordinate.latitude, longitude: self.loc1.coordinate.longitude)
                self.eventRecord.setObject(center1, forKey: "event")
                let publicData = CKContainer.defaultContainer().publicCloudDatabase
                publicData.saveRecord(self.eventRecord) { record, error in
                }
                if self.error == nil
                {
                    print("Event saved")
                }
                } else {
            }
            self.titleRecord.setObject(title2, forKey: "titles")
            let publicData1 = CKContainer.defaultContainer().publicCloudDatabase
            publicData1.saveRecord(self.titleRecord) { record, error in
            }
            if self.error == nil
            {
                print("Title saved")
            }
        }

func drawEvents(loc: CLLocation, title1: String)
    {
        let center = CLLocationCoordinate2D(latitude: loc.coordinate.latitude, longitude: loc.coordinate.longitude)
        let lat: CLLocationDegrees = center.latitude
        let long: CLLocationDegrees = center.longitude
        self.pointAnnotation1 = MKPointAnnotation()
        self.pointAnnotation1.title = title1
        self.pointAnnotation1.coordinate = CLLocationCoordinate2D(latitude: lat, longitude: long)
        self.pinAnnotationView = MKPinAnnotationView(annotation: self.pointAnnotation1, reuseIdentifier: nil)
        self.mapView?.centerCoordinate = self.pointAnnotation1.coordinate
        self.mapView.addAnnotation(self.pinAnnotationView.annotation!)
    }

func loadEvent(completion: (error:NSError?, records:[CKRecord]?) -> Void)
    {
        let query = CKQuery(recordType: "Event", predicate: NSPredicate(value: true))
        CKContainer.defaultContainer().publicCloudDatabase.performQuery(query, inZoneWithID: nil){
            (records, error) in
            if error != nil {
                print("error fetching events: \(error)")
                completion(error: error, records: nil)
            } else {
                //print("found events: \(records)")
                print("found events")
                completion(error: nil, records: records)
                guard let records = records else {
                    return
                }
                let query1 = CKQuery(recordType: "Title", predicate: NSPredicate(value: true))
                CKContainer.defaultContainer().publicCloudDatabase.performQuery(query1, inZoneWithID: nil){
                    (records1, error) in
                    if error != nil {
                        print("error fetching titles: \(error)")
                        completion(error: error, records: nil)
                    } else {
                        //print("found event title: \(records1)")
                        print("found event title")
                        completion(error: nil, records: records1)
                        guard let records1 = records1 else {
                            return
                        }
                        //for record in records
                        for(var i = 0; i<records.count; i += 1)
                        {
                            for(var j = i; j<i+1; j += 1)
                            {
                                self.drawEvents(records[i]["event"] as! CLLocation, title1: records1[i]["titles"] as! String)
                                print("drawing events")
                            }
                        }
                    }
                }
            }
        }
    }