Question

目前，我的应用程序固定了一个位置，该位置就是这样的商店：

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是我存储引脚位置的数组。

我想使用NSUserdefaults，但我不确定我是怎么做的，因为除了非NS数据之外没有。 swift的指南/结构将非常感谢！

Answer 1

您可以将NSData保存到NSUserDefaults。所以你需要的是使用NSKeyedArchiver方法archivedDataWithRootObject将你的CLLocation对象转换为NSData，如下所示：

// 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)
    }
}

应用程序关闭后如何保存Pin Annotation（Swift）

1 个答案: