ios - 长按快速将图钉注释添加到 map View

Question

我正在尝试制作一个 iPhone 应用程序，该应用程序要求用户能够长按 map View 上的某个位置以在该位置放置一个图钉。有人知道这是怎么做到的吗？

当您长按屏幕时，可以在苹果 map 中观察到该行为。它会放下一个图钉并显示一个注释，上面写着“dropped pin”

Answer 1

1. 将 UILongPressGestureRecognizer 添加到您的 MapView

   var uilgr = UILongPressGestureRecognizer(target: self, action: "addAnnotation:")
   uilgr.minimumPressDuration = 2.0
   
   map.add (uilgr)
   
   //IOS 9
   map.addGestureRecognizer(uilgr) 
   

2. 在长按检测上添加注释 - 功能:

   func addAnnotation(gestureRecognizer:UIGestureRecognizer){
       if gestureRecognizer.state == UIGestureRecognizerState.Began {
           var touchPoint = gestureRecognizer.locationInView(map)
           var newCoordinates = map.convertPoint(touchPoint, toCoordinateFromView: map)
           let annotation = MKPointAnnotation()
           annotation.coordinate = newCoordinates
   
           CLGeocoder().reverseGeocodeLocation(CLLocation(latitude: newCoordinates.latitude, longitude: newCoordinates.longitude), completionHandler: {(placemarks, error) -> Void in
               if error != nil {
                   println("Reverse geocoder failed with error" + error.localizedDescription)
                   return
               }
   
           if placemarks.count > 0 {
               let pm = placemarks[0] as! CLPlacemark
   
               // not all places have thoroughfare & subThoroughfare so validate those values
               annotation.title = pm.thoroughfare + ", " + pm.subThoroughfare
               annotation.subtitle = pm.subLocality
               self.map.addAnnotation(annotation)
               println(pm)
           }
           else {
               annotation.title = "Unknown Place"
               self.map.addAnnotation(annotation)
               println("Problem with the data received from geocoder")
           }
           places.append(["name":annotation.title,"latitude":"\(newCoordinates.latitude)","longitude":"\(newCoordinates.longitude)"])
       })
   }
   }
   

3. 或者您可以添加不带任何标题的注释:

   func action(gestureRecognizer:UIGestureRecognizer){
       var touchPoint = gestureRecognizer.locationInView(map)
       var newCoordinates = map.convertPoint(touchPoint, toCoordinateFromView: map)
       let annotation = MKPointAnnotation()
       annotation.coordinate = newCoordinates
       map.addAnnotation(annotation)
   }