如何在应用关闭后保存 Pin 注释 (Swift)

Question

目前，我的应用固定了一个位置，该位置是这样的商店：

func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
    // Find location of user
    var userLocation:CLLocation = locations[0] as! CLLocation
    var latitude = userLocation.coordinate.latitude
    var longitude = userLocation.coordinate.longitude
    var latDelta:CLLocationDegrees = 0.01
    var longDelta: CLLocationDegrees = 0.01
    var span: MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta)
    var location:MKUserLocation = currentLocation;
    var region: MKCoordinateRegion = MKCoordinateRegionMake(location.coordinate, span)
    var coordinate:CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude);
    carInitialLocation = userLocation;
    locationsDefaults.append(carInitialLocation);
    carInitialCoordinate = coordinate;

    self.map.setRegion(region, animated: true);
}

其中 locationsDefaults 是我存储图钉位置的数组。

我想使用 NSUserdefaults，但我不太确定我该怎么做，因为它不会使用非 NS 数据。 swift 中的 guideline/structure 将不胜感激！

Answer 1

您可以将 NSData 保存到 NSUserDefaults。所以你只需要使用 NSKeyedArchiver method archivedDataWithRootObject 将你的 CLLocation 对象转换为 NSData 如下：

// saving your CLLocation object
let locationData = NSKeyedArchiver.archivedDataWithRootObject(carInitialLocation)
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)
    }
}

如何在应用关闭后保存 Pin 注释 (Swift)

How to save Pin Annotation once app is closed (Swift)

nsuserdefaults

mapkit

ios

swift