丢弃引脚不推送位置数据使用Swift分析

Question

我有一个地图和两个按钮。地图自动定位用户，如果他或她按下按钮1，它会保存当前位置以进行解析。这工作正常。但是，如果您在地图上的其他地方导航并放置一个别针，我希望在您点击按钮2时将该地点推送到解析，但它只是推动当前位置。

我想我离我很近，我只是需要一点点帮助才能工作。

这里是我的代码

self.locationManager.delegate = self 
    self.mapView.delegate = self 
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest 
    self.locationManager.requestWhenInUseAuthorization() 
    self.locationManager.startUpdatingLocation() 
    self.mapView.showsUserLocation = true 
    let longPress = UILongPressGestureRecognizer(target: self, action: "mapLongPress:") 
    longPress.minimumPressDuration = 1.5 
    self.mapView.addGestureRecognizer(longPress) 

var mapChangedFromUserInteraction = false 

func mapViewRegionDidChangeFromUserInteraction() -> Bool { 
    let view = self.mapView.subviews[0] 
    // Look through gesture recognizers to determine whether this region change is from user interaction 
    if let gestureRecognizers = view.gestureRecognizers { 
     for recognizer in gestureRecognizers { 
      if(recognizer.state == UIGestureRecognizerState.Began || recognizer.state == UIGestureRecognizerState.Ended) { 
       return true 
      } 
     } 
    } 
    return false 
} 


func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) 
{ 
    let location = locations.last 

    let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude) 
    let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01)) 
    self.mapView.setRegion(region, animated: true) 
    self.locationManager.stopUpdatingLocation() 
} 
func mapLongPress(recognizer: UIGestureRecognizer){ 
    print("its done") 

    let touchedAt = recognizer.locationInView(self.mapView) 
    let touchedAtCoordinate : CLLocationCoordinate2D = mapView.convertPoint(touchedAt, toCoordinateFromView: self.mapView) 
    let newPin = MKPointAnnotation() 
    newPin.coordinate = touchedAtCoordinate 
    mapView.removeAnnotations(mapView.annotations) 
    mapView.showsUserLocation = false 
    mapView.addAnnotation(newPin) 
} 


@IBAction func photographer(sender: AnyObject, forEvent event: UIEvent) { 
    let manager = CLLocationManager() 
    let loc = manager.location!.coordinate 
    let actualLocation = PFGeoPoint(latitude:loc.latitude,longitude:loc.longitude) 
    let object = PFObject(className:"User") 
    object["Location"] = actualLocation 
    object.saveInBackgroundWithBlock { (_success:Bool, _error:NSError?) -> Void in 
     if _error == nil 
     { 
      // yay its saved 
     } 
    } 
} 

@IBAction func buyer(sender: AnyObject, forEvent event: UIEvent) { 

} 

Answer 1

如果我正确理解你的问题，你可以做这样的事情。

//this would be an optional property that could have a value if there was a pin that was dropped 
var locationsOfPinDrop: PFGeoPoint? 

func mapLongPress(recognizer: UIGestureRecognizer){ 

    let touchedAt = recognizer.locationInView(self.mapView) 
    let touchedAtCoordinate : CLLocationCoordinate2D = mapView.convertPoint(touchedAt, toCoordinateFromView: self.mapView) 
    let newPin = MKPointAnnotation() 
    newPin.coordinate = touchedAtCoordinate 
    mapView.removeAnnotations(mapView.annotations) 
    mapView.showsUserLocation = false 
    mapView.addAnnotation(newPin) 

    //I added this line... It will store the last location that was pressed using the long press. 
    self.locationOfPinDrop = PFGeoPoint(latitude:touchedAtCoordinate.latitude, touchedAtCoordinate:loc.longitude) 
} 

@IBAction func buyer(sender: AnyObject, forEvent event: UIEvent) { 
    if let location = locationOfPinDrop { 
      //there is a coordinate there, it is not nil. 
      let user = PFObject(className:"User") 
      user["Location"] = location 
      user.saveInBackgroundWithBlock { (_success:Bool, _error:NSError?) -> Void in 
       if _error == nil { 
         //This resets the locationOfPinDrop to nil now that it is saved. 
         self.locationOfPinDrop = nil 
       } 
      } 
     } 
} 

我有点难以理解你的问题，但我相信我的答案能解决它。我只需创建一个locatationOfPinDrop的存储属性，然后当用户长按时，locationOfPinDrop被设置为该坐标。现在，当按下按钮2 buyer时，该位置得到更新。

如果我明白了什么不对，请告诉我。

Answer 2

建立一个叫做lastPin或您设定为等于newPin一些财产。然后，当你打电话给买方功能时，基本上你在做另一个功能，除了使用myLocation以外，使用标记的位置。