在一个干净的演示项目中，我创建了一个UIViewRepresentable的MapView，它工作得很好。它读取带有多边形的geojson文件并将其绘制在Map上。当我将这段代码复制到我需要此功能的更大的项目中时，我得到了以下错误：
1.类型“MapView”不符合协议“UIViewRepresentable”
1.类型“Context”的值没有成员“coordinator”
我不明白为什么独立的项目编译完美，并集成在我的其他项目，它不。iOS版本设置相同
有人能解释一下什么是错的吗？

import SwiftUI
import MapKit

struct MapView: UIViewRepresentable {  
    var coordinate: CLLocationCoordinate2D
    
    func makeUIView(context: Context) -> MKMapView {
        let map = MKMapView()
        map.mapType = .hybrid
        map.delegate = context.coordinator
        let region = MKCoordinateRegion( center: coordinate, latitudinalMeters: CLLocationDistance(exactly: 5000)!, longitudinalMeters: CLLocationDistance(exactly: 5000)!)
        //map.setRegion(map.regionThatFits(region), animated: true)
        map.centerCoordinate = coordinate
        map.showsCompass = true
        map.showsUserLocation = true
        map.addOverlays(parseGeoJSON())
        
    
        return map
    }
 

    func updateUIView(_ uiView: MKMapView, context: Context) {
        let map = MKMapView()
        map.setNeedsDisplay()
    }
    
    
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    //MARK: Our delegate handler
    final class Coordinator: NSObject, MKMapViewDelegate {
        var control: MapView
        
        init(_ control: MapView) {
            self.control = control
        }
        
        func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer{
            if let polygon = overlay as? MKPolygon {
                
                let renderer = MKPolygonRenderer(polygon: overlay as! MKPolygon)
                renderer.fillColor = UIColor(red: 57 / 255, green: 255/255, blue: 20/255, alpha: 0.5)
                //renderer.fillColor = UIColor(red: 192 / 255, green: 45/255, blue: 233/255, alpha: 0.5)
                renderer.strokeColor = UIColor.black
                renderer.lineWidth = 2
                return renderer
                
 
            }
            return MKOverlayRenderer(overlay: overlay)
        }
 
        
    }
    func parseGeoJSON() -> [MKOverlay]{
        guard let url = Bundle.main.url(forResource: "zone", withExtension: "json") else {
            fatalError("NOT FOUND")
        }
        var geoJson = [MKGeoJSONObject]()
        do{
            let data = try Data(contentsOf: url)
            geoJson = try MKGeoJSONDecoder().decode(data)
        } catch {

        }
        var overlays = [MKOverlay]()
        for item in geoJson{
            if let feature = item as? MKGeoJSONFeature {
                for geo in feature.geometry{
                    if let polygon = geo as? MKPolygon{
                        overlays.append(polygon)
                    }
                }
            }
        }
        return overlays
    }
}
 

struct ContentView: View {

    var body: some View {
        ZStack(alignment: .top) {
            MapView(coordinate: CLLocationCoordinate2D(latitude:34.2226,longitude:-82.4592))
        }
        .ignoresSafeArea()
        .navigationBarHidden(true)
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
            ContentView()
    }
}