templateApplicationScene 中的 iOS CarPlay swift 异步请求

问：

我正在尝试使用异步调用中的数据加载一些 CPListItem。使用虚拟数据，这工作正常（不异步调用）

我的 fetchAllFavourites 方法运行正常，但 carPlay 模拟器上未显示任何内容。

import Foundation
import CarPlay

class CarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
    
    var interfaceController: CPInterfaceController?
    var stationItems: [CPListItem] = []
    
    func loadList(withStations stations: [CPListItem]) {

          let section = CPListSection(items: stations)
          let listTemplate = CPListTemplate(title: "Select a station",
                                            sections: [section])
          
          // Set the root template of the CarPlay interface
          // to the list template with a completion handler
          interfaceController?.setRootTemplate(listTemplate,
                                            animated: true) { success, error in
              
              // add anything you want after setting the root template
          }
      }
    
    func templateApplicationScene(_ templateApplicationScene: CPTemplateApplicationScene, didConnect interfaceController: CPInterfaceController) {
    
        FetchFavourites().fetchAllFavourites { stations in
            for station in stations {
                let testStation = CPListItem(text: station.type, detailText: station.adresse, image: UIImage(systemName: "BP"))
                
                testStation.accessoryType = .disclosureIndicator
                testStation.handler =  {  testStation, completion in
                    
                    print("Clicked")
                    completion()
                }
                self.stationItems.append(testStation)
            }
            self.loadList(withStations: self.stationItems)
        }
    }
}