Question

我正试图获得<代码>。快速倡议 +MapKit +LongPress/code> gesture working. 当我在<条码>中添加地图时,该地图发挥了巨大作用。然后,在地图上添加<条码>。长期的新闻工作是成功的。


我正在致力于:
Map(coordinateRegion: $region, interactionModes: .all, showsUserLocation: true)
  .onLongPressGesture {
    // How do I get the location (Lat/Long) I am pressed on?
    print("onLongPressGesture")
  }

此外,是否还有办法从长篇的报摊中接手?

只使用<条码>SwiftUI,而不在<条码>内打上<条码>。

Answer 1

不要问为什么,但这似乎奏效:

    Map(coordinateRegion: $region, interactionModes: .all, showsUserLocation: true)
        .gesture(DragGesture())
        .onLongPressGesture {
            print("Here!")
        }

Answer 2

Yep.

缩略语

func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
            // We need to update the region when the user changes it
            // otherwise when we zoom the mapview will return to its original region
            DispatchQueue.main.async {
                if self.longPress == nil {
                    let recognizer = UILongPressGestureRecognizer(target: self, action: #selector(self.longPressGesture(recognizer:)))
                    mapView.addGestureRecognizer(recognizer)
                    self.longPress = recognizer
                }
                self.parent.region = mapView.region
            }
        }

之后

    @objc func longPressGesture(recognizer: UILongPressGestureRecognizer) {
        if let mapView = recognizer.view as? MKMapView {
            let touchPoint = recognizer.location(in: mapView)
            let touchMapCoordinate =  mapView.convert(touchPoint, toCoordinateFrom: mapView)
            
            // TODO: check if we already have this location and bail out
            if annotations.count > 0 {
                return
            }
            
            let annotation = Annotation(title: touchMapCoordinate.stringValue, coordinate: touchMapCoordinate)
            mapView.removeAnnotations(annotations.compactMap({ $0.pointAnnotation }))
            annotations.append(annotation)
            mapView.addAnnotation(annotation.pointAnnotation)
        }
    }

https://stackoverflow.com/a/71698741/1320010”

Answer 3

回答你提问的最后一个部分——保罗·哈得逊表明,如何在22/隆重的

    MapReader { proxy in    
        Map()    
            .onTapGesture { position in    
                if let coordinate = proxy.convert(position, from: .local) {    
                    print(coordinate)    
                }    
            }    
    }

Answer 4

在这里,我如何能够找到长老会的位置,同时保持马普吉斯先发制人<代码>选取/代码”参数的功能(即在现有地图标上不许长时间):

struct MapLongPressTestView: View {
    @State private var selectedMapItemTag: String? = nil
    private let randomCoordinate = CLLocationCoordinate2D(latitude: .random(in: -90...90), longitude: .random(in: -180...180))

    var body: some View {
        MapReader { proxy in
            Map(selection: $selectedMapItemTag) {
                // Your Annotations, Markers, Shapes, & other map content

                // Selectable Test Example
                Annotation(coordinate: randomCoordinate) {
                    Image(systemName: "water.waves")
                        .foregroundStyle(.orange)
                } label: {
                    Text("Water, most likely")
                }
                .tag("example")
            }
            .gesture(DragGesture())
            .gesture(
                LongPressGesture(minimumDuration: 1, maximumDistance: 0)
                    .sequenced(before: SpatialTapGesture(coordinateSpace: .local))
                    .onEnded { value in
                        switch value {
                        case let .second(_, tapValue):
                            guard let point = tapValue?.location else {
                                print("Unable to retreive tap location from gesture data.")
                                return
                            }
                            
                            guard let coordinate = proxy.convert(point, from: .local) else {
                                print("Unable to convert local point to coordinate on map.")
                                return
                            }

                            print("Long press occured at: (coordinate)")
                        default: return
                        }
                    }
            )
        }
        .onChange(of: selectedMapItemTag) {
            print(selectedMapItemTag.map { "($0) is selected" } ?? "No selection")
        }
    }
}

或者,此处是<代码>Map的延伸,以减少碎块:

extension Map {
    func onLongPressGesture(minimumDuration: Double = 0, maximumDistance: CGFloat = 0, onTouchUp: @escaping (CGPoint) -> Void) -> some View {
        self
            .gesture(DragGesture())
            .gesture(
                LongPressGesture(minimumDuration: minimumDuration, maximumDistance: maximumDistance)
                    .sequenced(before: SpatialTapGesture(coordinateSpace: .local))
                    .onEnded { value in
                        switch value {
                        case .second(_, let tapValue):
                            guard let point = tapValue?.location else {
                                print("Unable to retreive tap location from gesture data.")
                                return
                            }

                            onTouchUp(point)
                        default: return
                        }
                    }
            )
    }
}

这样做是为了:

MapReader { proxy in
    Map(selection: $selectedMapItemTag) {
        // ...
    }
    .onLongPressGesture(minimumDuration: 1) { point in
        if let coordinate = proxy.convert(point, from: .local) {
            print("Long press occured at: (coordinate)")
        }
    }
}

SpacialTapGesture,可在Si 16+查阅。

Hope this helps!

友情链接