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我一直在努力让 SwiftUI 中的 Mapbox Navigation SDK 工作。我有 UIKit 中版本的工作示例，如文档中所示：https ://docs.mapbox.com/ios/navigation/guides/get-started/install/ 。然而，事实证明这在 SwiftUI 中很难实现。

这是我的代码的样子：

'''

导入 Foundation 导入 SwiftUI 导入 CoreLocation 导入 MapboxDirections 导入 MapboxCoreNavigation 导入 MapboxNavigation

结构导航视图：UIViewControllerRepresentable {

let origin = Waypoint(coordinate: CLLocationCoordinate2D(latitude: 38.9131752, longitude: -77.0324047), coordinateAccuracy: 20, name: "Mapbox")
let destination = Waypoint(coordinate: CLLocationCoordinate2D(latitude: 38.8977, longitude: -77.0365), coordinateAccuracy: 20, name: "White House")

@Binding var presentedAsModal: Bool
var navigationViewController: NavigationViewController?

func makeCoordinator() -> NavigationView.Coordinator {
    Coordinator(self)
}

func makeUIViewController(context: UIViewControllerRepresentableContext<NavigationView>) -> NavigationViewController {
    
    //let directionsRoute = NavigationRouteOptions(waypoints: [origin, destination], profileIdentifier: .automobile)
    calculateRoute()
    
    /*
     Directions.shared.calculate(directionsRoute) { session, result in
     
     
     switch result {
     case .failure(let error):
     print(error.localizedDescription)
     case.success(let response):
     // Pass the first generated route to the navigationViewController
     viewController.self = NavigationViewController(for: response, routeIndex: 0, routeOptions: directionsRoute)
     viewController.self!.modalPresentationStyle = .fullScreen
     
     Button("dismiss") {
     self.presentedAsModal = false
     }
     }
     }
     */
    if navigationViewController != nil {
        navigationViewController?.delegate = context.coordinator
    }
    return navigationViewController!
}

func updateUIViewController(_ uiViewController: NavigationViewController, context: UIViewControllerRepresentableContext<NavigationView>) {
    
}
func calculateRoute() {
    
    // View Controller:
    var viewController: NavigationViewController?
    
    // Define two waypoints to travel between
    let origin = Waypoint(coordinate: CLLocationCoordinate2D(latitude: 38.9131752, longitude: -77.0324047), name: "Mapbox")
    let destination = Waypoint(coordinate: CLLocationCoordinate2D(latitude: 38.8977, longitude: -77.0365), name: "White House")
    
    // Set options
    let routeOptions = NavigationRouteOptions(waypoints: [origin, destination])
    
    // Request a route using MapboxDirections.swift
    Directions.shared.calculate(routeOptions) { (session, result) in
        switch result {
        case .failure(let error):
            print(error.localizedDescription)
        case .success(let response):
            // Pass the first generated route to the the NavigationViewController
            viewController = NavigationViewController(for: response, routeIndex: 0, routeOptions: routeOptions)
            viewController!.modalPresentationStyle = .fullScreen
        }
    }
    viewController = navigationViewController
}

class Coordinator: NSObject, NavigationViewControllerDelegate {
    var control: NavigationView
    
    init(_ control: NavigationView) {
        self.control = control
    }
}

}

'''

这里的问题似乎是它根本没有通过：Directions.shared.calculate()。

这是视频中问题的链接：https ://drive.google.com/file/d/19zHVbWaYjvWkzMD-cKvuXbJ5EMs10k5h/view?usp=sharing

提前谢谢你的帮助！

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