Deleting CKRecord from Cloudkit in swift - ios

Question

I am trying to have the users' location be updated by this function. Originally it was saving the users' location every time, but I added the code that will be below the comment. How can I make sure the record that is being deleted is the old location?
let locationRecord = CKRecord(recordType: "location")
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
let location = locations.last
let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
self.mapView.setRegion(region, animated: true)
self.locationManager.stopUpdatingLocation()//
locationRecord.setObject(location, forKey: "location")
let publicData = CKContainer.defaultContainer().publicCloudDatabase
publicData.saveRecord(locationRecord) { record, error in
}
if error == nil
{
print("Location saved")
self.loc1 = location!
}
//testing code below
let operation = CKModifyRecordsOperation(recordsToSave: nil, recordIDsToDelete: [locationRecord.recordID])
operation.savePolicy = .AllKeys
operation.modifyRecordsCompletionBlock = { added, deleted, error in
if error != nil {
print(error)
} else {
print("location updated")
}
}
CKContainer.defaultContainer().publicCloudDatabase.addOperation(operation)
}

Answer 1

The best way to do this would be to update the existing one, as #Michael pointed out. The easy way to do this would be the first time you create the record, save the recordID to the defaults. For example,
func getRecordToUpdate(locations:[CLLocation])->CKRecord?{
let defaults = NSUserDefaults.standardUserDefaults()
var locationRecord:CKRecord
if defaults.objectForKey("locationRecordID") == nil{
//Create a new record and save its id
locationRecord = CKRecord(recordType: "location")
defaults.setObject(locationRecord.recordID, forKey: "locationRecordID")
self.updateLocationRecord(locationRecord, locations)
}else{
//Fetch the already existing record
let publicDB = CKContainer.defaultContainer().publicCloudDatabase
publicDB.fetchRecordWithID((defaults.objectForKey("locationRecordID") as! CKRecordID), completionHandler{
(record, error) in
if error == nil{
self.updateLocationRecord(record, locations)
}else{
print("Error fetching previous record")
}
}
}
}
Create a new function,
func updateLocationRecord(locationRecord:CKRecord, locations:[CLLocation]){
//Put your code from "let location..." to just above the testing code
//You may want to fix the block syntax in the call to saveRecord
}
Then in the original locationManager method, take out everything and put
self.getRecordsToUpdate(locations)