Question

我正在尝试使用Parse和Swift完成this。

import UIKit
import MapKit
import CoreLocation

class MapViewController: UIViewController, MKMapViewDelegate, CLLocationManagerDelegate {

var latitude:Double = 0.0
var longitude:Double = 0.0

@IBOutlet var map: MKMapView!


override func viewDidLoad() {
    super.viewDidLoad()
    self.navigationController?.setNavigationBarHidden(true , animated: true)
    self.map.showsUserLocation = true
    self.map.delegate = self


    PFGeoPoint.geoPointForCurrentLocationInBackground { (geopoint:PFGeoPoint?, error:NSError?) -> Void in

        var query = PFQuery(className: "Locations")
        query.whereKey("geopoint", nearGeoPoint: geopoint!)
        query.findObjectsInBackgroundWithBlock { (objects, error) -> Void in

            if let myObjects = objects {

                for object in myObjects {

                    var thePoint: PFGeoPoint = object["geopoint"] as! PFGeoPoint
                    self.latitude = thePoint.latitude
                    self.longitude = thePoint.longitude
                    NSLog(" Hej %f, %f", self.latitude, self.longitude)
                    var annotationCoordinate: CLLocationCoordinate2D = CLLocationCoordinate2DMake(self.latitude, self.longitude)
                    var annotation = MKPointAnnotation()
                    annotation.coordinate = annotationCoordinate
                    annotation.title = object["discovery"] as! String
                    annotation.subtitle = object["location"] as! String
                    self.map.addAnnotation(annotation)

                }
            }
        }
    }
}

大图虽然，我正在尝试创建一种方法来访问存储在Parse（及其位置）上的图片，如果他们符合我的查询，则将它们显示在地图上。我非常感谢任何帮助！

Answer 1

如果您在

中收到转换错误

var thePoint: PFGeoPoint = object["geopoint"]

将其更改为

var thePoint: PFGeoPoint = object["geopoint"] as! PFGeoPoint

关于将Double转换为Int，它看起来像你发现的那样，但我不知道swift设计师决定背后的理由。我想了解为什么需要转换，因为可能有替代实现

使用Parse映射地图

1 个答案: