ios - postman 响应正常，但在 Swift 3 上的 Alamofire 返回失败

Question

我使用 GoogleMap Direction API 绘制多个位置的路线。我用 postman 检查响应状态，我可以检查 200 OK。但问题是当我使用 Alamofire 时，响应是失败!

当我从起点画到终点时，响应正常。(总是)但是如果我添加额外的位置，Alamofire 返回失败。

有人遇到同样的问题并解决了吗？

下面是我的代码。谢谢!

 originAddress = locationInfoList[0]
        destinationAddress = locationInfoList.last
        var wayPointUrl:String = ""
        var waypoint = locationInfoList.dropFirst()
        waypoint = waypoint.dropLast()

        for coordinate in waypoint {
            print("~~~~")

            let wayPoint = "|\(coordinate.latitude),\(coordinate.longitude)"
            wayPointUrl.append(wayPoint)
            print("~XXXXXXX~~~")
            print(wayPointUrl)
            print("XXXXXXX")
        }

        directionURL = "https://maps.googleapis.com/maps/api/directions/json?" +
            "origin=\(originAddress.latitude),\(originAddress.longitude)&destination=\(destinationAddress.latitude),\(destinationAddress.longitude)&waypoints=optimize:true\(wayPointUrl)" +
        "&key=apikey"

        print("VVVVVVV")
        print(directionURL)
        print("VVVVVVVV")
    }

    Alamofire.request(directionURL, method: .post, parameters: nil, encoding: JSONEncoding.default, headers: nil).responseJSON { (response) in

        print(response)

        if let JSON = response.result.value {

            print(JSON)

            let mapResponse: [String: AnyObject] = JSON as! [String : AnyObject]

            let routesArray = (mapResponse["routes"] as? Array) ?? []

            let routes = (routesArray.first as? Dictionary<String, AnyObject>) ?? [:]

            let overviewPolyline = (routes["overview_polyline"] as? Dictionary<String,AnyObject>) ?? [:]
            let polypoints = (overviewPolyline["points"] as? String) ?? ""
            let line  = polypoints

            self.addPolyLine(encodedString: line)
            }
        }
    }

Answer 1

看来您是在URL中发送参数并使用JSON编码。 Alamofire请求的编码参数，将JSONEncoding.default修改为URLEncoding.default。

同样来自 Google Map API Docs，它说如下。所以我相信，URL 编码将解决您的问题。

每个航路点可以是地名、地址或以逗号分隔的纬度/经度坐标。字符串应进行 URL 转义，因此应将“Berlin,Germany|Paris,France”等路标转换为 Berlin%2CGermany%7CParis%2CFrance。