在Swift中正确采用DJIMutableWaypointMission

Question

我正在尝试为我的自定义iOS类采用DJIMutableWaypointMission，因为我希望在其上实现一些自定义验证代码（尚待编写）。一切似乎都能正常工作，我可以设置所有参数和航路点，但是当我尝试使用DJIMissionControl安排实例时，出现DJIMissionControlElementErrorInvalidMissionOperator错误，并带有以下描述：“传递的元素是没有有效操作员的任务。” < / p>

这是我的自定义任务班：

//
//  WaypointMissionTimelineElement.swift
//  ReactNativeDjiMobile
//
//  Created by Adam Rosendorff on 2019/03/06.
//

import Foundation
import DJISDK

public class WaypointMissionTimelineElement: DJIMutableWaypointMission {

  init(parameters: NSDictionary) {
    super.init()

    guard let autoFlightSpeedParameter = parameters["autoFlightSpeed"] as? Float else {
      // TODO: (Adam) Throw an error here!
      return
    }

    guard let maxFlightSpeedParameter = parameters["maxFlightSpeed"] as? Float else {
      // TODO: (Adam) Throw an error here!
      return
    }

    guard let waypointsParameter = parameters["waypoints"] as? [Any] else {
      // TODO: (Adam) Throw an error here!
      return
    }

    //    guard let
    //      autoFlightSpeed = parameters["autoFlightSpeed"] as? Float
    //      maxFlightSpeed = parameters["maxFlightSpeed"] as? Float
    //      else {
    //      // TODO: (Adam) Throw an error here!
    //    }

    self.autoFlightSpeed = autoFlightSpeedParameter
    self.maxFlightSpeed = maxFlightSpeedParameter

    var waypoints: [DJIWaypoint] = []
    for case let waypointData as [String: Double] in waypointsParameter {
      let waypointCoordinate = CLLocationCoordinate2D.init(latitude: waypointData["latitude"]!, longitude: waypointData["longitude"]!)
      let waypoint = DJIWaypoint.init(coordinate: waypointCoordinate)
      waypoint.altitude = Float(waypointData["altitude"]!)
      waypoints.append(waypoint)
    }

    self.addWaypoints(waypoints)

  }
}

我还需要在自定义类上设置什么以允许其计划并作为航点任务运行？

谢谢！