反向地理编码返回随机的亚洲位置

Question

我正在将长时间变为纬度，并且出于某种原因，当这段代码具有来自美国某处的经度和纬度时（斯德哥尔摩瑞典的作品），它给了我一个在亚洲的随机位置。有什么想法吗？

        geocoder.reverseGeocodeLocation(CLLocation(latitude: latitude, longitude: longitude), completionHandler: { (placemarks:[AnyObject]!, error:NSError!) -> Void in
            var placemark = placemarks.last as? CLPlacemark
            var locationString = ""
            if let administrative = placemark?.administrativeArea{
                locationString = locationString + administrative
                if let subadminstrative = placemark?.subAdministrativeArea{
                    locationString = locationString + subadminstrative
                }