传递地图坐标数组以在地图上快速绘制路线

您好，我有一个像这样的坐标数据数组，它是从 API 调用中检索的，我使用 for 循环将数据附加到如下数组中：

extension TripListViewController: UITableViewDelegate {


    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        
        performSegue(withIdentifier: Constants.segueTripListToTripMap, sender: indexPath)

        tableView.deselectRow(at: indexPath, animated: true)
    }

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        if segue.identifier == Constants.segueTripListToTripMap {
            if let destinationVC = segue.destination as? TripMapViewController,
                let indexPath = sender as? IndexPath {
                
                
                for i in 0...(tripList[indexPath.section][indexPath.row].coordinates.count-1) {
                    self.coodinates.append(tripList[indexPath.section][indexPath.row].coordinates[i])
                }
                
                destinationVC.coodinatePoints = coodinates
                
                
                 
            }
        } else {
            if let destinationVC = segue.destination as? PolicyOverviewViewController,
                let indexPath = sender as? IndexPath {
                // do something
            }
        }

    }

}

它有一个错误...我不知道如何将此数组传递给我在另一个屏幕中声明的变量，数据类型似乎不匹配。

原始数据类型如下所示：

struct Trips: Codable {
    let id: String
    let userId: String
    let coordinates: [Coordinates]

}

struct Coordinates: Codable {
    let lat: Double?
    let lng: Double?
    let time: String?
}

[
["time": "timestampes"
"lat": 40.213
"lon": 5.203],
["time": "timestampes"
"lat": 40.213
"lon": 5.203],
["time": "timestampes"
"lat": 40.213
"lon": 5.203],
["time": "timestampes"
"lat": 40.213
"lon": 5.203]

]

如何将此数据传递到绘制路线函数的点变量中。目前它是用一些虚拟数据进行硬编码的。

func drawRoutes() {

        var points = [CLLocationCoordinate2DMake(51.079980, 4.349850),
                      CLLocationCoordinate2DMake(51.079060, 4.350830),
                      CLLocationCoordinate2DMake(51.078210, 4.350490),
                      CLLocationCoordinate2DMake(51.077750, 4.350890),
                      CLLocationCoordinate2DMake(51.076760, 4.354600),
                      CLLocationCoordinate2DMake(51.075130, 4.351000),
                      CLLocationCoordinate2DMake(51.073800, 4.350690),
                      CLLocationCoordinate2DMake(52.071850, 4.352880),
                      CLLocationCoordinate2DMake(52.069320, 4.355940),
                      CLLocationCoordinate2DMake(52.069120, 4.356130),
                      CLLocationCoordinate2DMake(52.069120, 4.356130),
                      CLLocationCoordinate2DMake(52.069120, 4.356130),
                      CLLocationCoordinate2DMake(52.068570, 4.356950),
                      CLLocationCoordinate2DMake(52.067840, 4.358440),
                      CLLocationCoordinate2DMake(52.066730, 4.357490),
                      CLLocationCoordinate2DMake(52.066590, 4.358680),
                      CLLocationCoordinate2DMake(52.066580, 4.358680),
                      CLLocationCoordinate2DMake(52.066580, 4.358680),
                      CLLocationCoordinate2DMake(52.066830, 4.357490),
                      CLLocationCoordinate2DMake(52.067600, 4.358520),
                      CLLocationCoordinate2DMake(52.068650, 4.356920),
                      CLLocationCoordinate2DMake(52.074330, 4.350360),
                      CLLocationCoordinate2DMake(52.075520, 4.351880),
                      CLLocationCoordinate2DMake(52.076950, 4.355350),
                      CLLocationCoordinate2DMake(52.078000, 4.350690),
                      CLLocationCoordinate2DMake(52.078010, 4.350710),
                      CLLocationCoordinate2DMake(52.079520, 4.351560),
                      CLLocationCoordinate2DMake(52.080680, 4.350220),
                      CLLocationCoordinate2DMake(52.080760, 4.348890),
                      CLLocationCoordinate2DMake(52.079890, 4.349980),
                      CLLocationCoordinate2DMake(52.079890, 4.350000)]

        let polygon = MKPolyline(coordinates: &points, count: points.count)

        self.mapView.addOverlay(polygon)
        self.mapView.setVisibleMapRect(polygon.boundingMapRect, animated: true)

        var startPoint = points[0]
        
        for i in 1...(points.count-1) {
            
            guard let request = createRequest(c1:startPoint, c2:points[i]) else { return }
            let directions = MKDirections(request: request)

            directions.calculate { [unowned self] (response, error) in
                guard let response = response else { return }
                let routes = response.routes
                let bestDest = routes[0]
                startPoint = points[i]
            }
        }
    }

多谢 ！

您可以使用map转换你的坐标

let points: [CLLocationCoordinate2D] = coordinates.compactMap {
    guard let latitude = $0.lat, let longitude = $0.lng else { return nil }
    return CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
}

这将转换所有具有给定纬度和经度的坐标对象。

您确定坐标中的属性可以为空吗？如果不是，上面可以简化为

let points: [CLLocationCoordinate2D] = coordinates.map {
    CLLocationCoordinate2D(latitude: $0.lat, longitude: $0.lng)
}