如果NSUserDefault存在于Swift中，则尝试更新CLLocation

Question

最初，我试图将CLLocation另存为NSUserDefault值，然后再将其存储为CKRecord在CLoudkit中，但是出现错误：“ defaults.setObject（locationRecord.recordID，forKey：“ locationRecordID”）“，原因是“试图将非属性列表对象设置为键locationRecordID “ 的NSUserDefaults / CFPreferences值。因此，现在我尝试将lat和long保存为默认值，并替换Cloudkit中的旧位置。我当前在“ publicDB.fetchRecordWithID（（defaults.objectForKey（“ Location”）as！CKRecordID），completionHandler： “ 行上收到“ Thread 1 SIGABRT ”错误，原因是“ 无法转换类型为'__NSCFDictionary'的值（0x1a1bec968）为“ CKRecordID”。”

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
    {
        let location = locations.last
        self.loc1 = location!
        let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.004, longitudeDelta: 0.004))
        self.mapView.setRegion(region, animated: true)
        self.locationManager.stopUpdatingLocation()
        self.locationManager.startMonitoringSignificantLocationChanges()

        self.getRecordToUpdate(locations)

        let lat: CLLocationDegrees = center.latitude
        self.lat1 = lat
        let long: CLLocationDegrees = center.longitude
        self.long1 = long

        locationRecord.setObject(location, forKey: "location")
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(locationRecord) { record, error in
        }
        if error == nil
        {
            print("Location saved")
        }
    }

func getRecordToUpdate(locations:[CLLocation])
    {
        let defaults = NSUserDefaults.standardUserDefaults()
        var locationRecord:CKRecord

        if defaults.objectForKey("Location") == nil{
            locationRecord = CKRecord(recordType: "location")
            let locationDict = ["lat": lat1, "lng": long1]//
            defaults.setObject(locationDict, forKey: "Location")//
            self.updateLocationRecord(locationRecord, locations: locations)
            print("new")
        }else{
            let publicDB = CKContainer.defaultContainer().publicCloudDatabase
            publicDB.fetchRecordWithID((defaults.objectForKey("Location") as! CKRecordID),completionHandler: {  
                (record, error) in
                if error == nil{
                    self.updateLocationRecord(record!, locations: locations)
                    print("fetched record")
                }else{
                    print("Error fetching previous record")
                }
            })
        }
    }
    func updateLocationRecord(locationRecord:CKRecord, locations:[CLLocation])
    {
        let location = locations.last
        locationRecord.setObject(location, forKey: "location")
        let publicData = CKContainer.defaultContainer().publicCloudDatabase
        publicData.saveRecord(locationRecord) { record, error in
        }
        if error == nil
        {
            print("Location saved")
        }
    }

Answer 1

尝试这个

您可以将NSData保存到NSUserDefaults。因此，您所需要做的就是将CLLocation对象转换为NSData，如下所示：

// saving your CLLocation object
let locationData = NSKeyedArchiver.archivedDataWithRootObject(your location here)
NSUserDefaults.standardUserDefaults().setObject(locationData, forKey: "locationData")

// loading it
if let loadedData = NSUserDefaults.standardUserDefaults().dataForKey("locationData") {
    if let loadedLocation = NSKeyedUnarchiver.unarchiveObjectWithData(loadedData) as? CLLocation {
        println(loadedLocation.coordinate.latitude)
        println(loadedLocation.coordinate.longitude)
    }
}