Swiftui 如何获取UIRepresentable的协调器类中的值？

我正在使用来显示高程，当我点击图表时，我会得到该点的索引，我想使用该索引在其上方的地图上放置一个标记。即位置[索引]。坐标

我有以下代码，我正在尝试将索引值传递给我的mapView，它也使用UIRepresentable显示地图，但我很难弄清楚如何连接到发布服务器

如何将Coordinator类中发布的@Published连接到MapKitView，以便将索引视为Int

import SwiftUI
import CoreLocation
import Charts

struct ElevationGraphView: UIViewRepresentable  {
    typealias UIViewType = LineChartView
    

    var locations: [CLLocation]?
    let formatter = DateFormatter()
    
    class Coordinator: NSObject, ChartViewDelegate,  ObservableObject {
        
        @Published var index: Int = 0
        
        var parent: ElevationGraphView
        init(_ parent: ElevationGraphView) {
            self.parent = parent
        }
        
        func chartValueSelected(_ uiView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {
            
            if let dataSet = uiView.data?.dataSets[highlight.dataSetIndex] {
                let value = dataSet.entryIndex(entry: entry)
                print("Index: \(value)")
                
                // How to get value?
            }
        }
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }

---

如我所见，最简单的方法是使用外部可观察性（以避免将所有这些东西紧密结合在一起）

这是一种可能的方法（因此两个视图都不了解对方）

您不需要让内部协调器可见（这是毫无意义的）

类协调器：NSObject、ChartViewDelegate{ //…其他代码 func chartValueSelected（uiView:ChartViewBase，条目：ChartDataEntry，高亮显示：高亮显示）{ 如果let dataSet=uiView.data？.dataSets[高亮显示.dataSetIndex]{ 让值=dataSet.entryIndex（条目：条目） 打印（“索引：\（值）”） ChartBridge.shared.selectedIndex=值//

struct RaceDetailView: View {
   var body: some View {
        VStack {
            MapKitView(locations: raceDetails.locations, markers: raceDetails.pins, region: raceDetails.region)
            ElevationGraphView(locations: raceDetails.locations)

struct MapKitView: UIViewRepresentable {
    
    let locations: [CLLocation]?
    let markers: [Pin]?
    let region: MKCoordinateRegion?

     ...

    let racePointMarker = RaceMarker(coordinate: locations[index].coordinate, title: "", tint: Color.black)
        mapView.addAnnotation(racePointMarker)
 

class ChartBridge: ObservableObject {
    let shared = ChartBridge()
    @Published var selectedIndex: Int = 0
}

class Coordinator: NSObject, ChartViewDelegate {
    
    // ... other code
    
    func chartValueSelected(_ uiView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {
        
        if let dataSet = uiView.data?.dataSets[highlight.dataSetIndex] {
            let value = dataSet.entryIndex(entry: entry)
            print("Index: \(value)")
            
            ChartBridge.shared.selectedIndex = value       // << here set !!
        }
    }
}

struct MapKitView: UIViewRepresentable {
    @ObservedObject var chart = ChartBridge.shared

    // ... other code

    let racePointMarker = RaceMarker(coordinate: 
        locations[chart.selectedIndex].coordinate,    // << here consume !!
        title: "", tint: Color.black)
        mapView.addAnnotation(racePointMarker)