unity通过GPS定位

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Net;
using System.Xml;
using System.IO;
using System.Text;
using UnityEngine.UI;

public class NewBehaviourScript : MonoBehaviour {

    public string gps_info = "";
    public int flash_num = 1;

    // Use this for initialization
    void Start () {
        
    }

    // Update is called once per frame
    void Update () {
        
    }

    void OnGUI(){
        GUI.skin.label.fontSize = 25;
        GUI.Label (new Rect (20, 20, 600, 48), this.gps_info);
        GUI.Label (new Rect (20, 50, 600, 48), this.flash_num.ToString());

        GUI.skin.button.fontSize = 50;

        if (GUI.Button(new Rect(Screen.width/2-110,200,220,85),"GPS定位")) {
            StartCoroutine ("StartGPS");
        }



        if (GUI.Button(new Rect(Screen.width/2-110,500,220,85),"刷新GPS")) {


            this.gps_info = "N" + Input.location.lastData.latitude + "E" + Input.location.lastData.longitude;
            this.gps_info = gps_info + "Time" + Input.location.lastData.timestamp;

            this.flash_num += 1;

        
        }
    }

    void StopGPS(){

        Input.location.Stop ();
    }

    IEnumerator StartGPS(){
        if (!Input.location.isEnabledByUser) {
            this.gps_info = "isEnabledByUser value is:" + Input.location.isEnabledByUser.ToString() + "Please trun on this GPS";
            //return false;
        }

        Input.location.Start (10.0f,10.0f);

        int maxWait = 20;


        while (Input.location.status == LocationServiceStatus.Initializing && maxWait >0) {
            yield return new WaitForSeconds (1);
            maxWait--;
        }
        if (maxWait<1) {
            this.gps_info = "Init GPS service time out";
            //return false;
        }

        if (Input.location.status == LocationServiceStatus.Failed) {
            this.gps_info = "Unable to determine device location";
            //return false;
        } else {
            this.gps_info = "N:" + Input.location.lastData.latitude + "E:" + Input.location.lastData.longitude;
            this.gps_info = this.gps_info + "Time:" + Input.location.lastData.timestamp;
            yield return new WaitForSeconds (100);
        }


    }






}