Unity3D GPS获取玩家地理位置

using UnityEngine;
using System.Collections;

public enum LocationError
{
ERROR_NONE, //没有错误
ERROR_NOT_ENABLED, //GPS未启用
ERROR_TIMEOUT, //请求超时
ERROR_FAILED, //请求失败

}
public class LocationInfo
{
///
/// Geographical device location latitude. 纬度
///
public float latitude;
///
/// Geographical device location longitude 经度
///
public float longitude;
///
/// Geographical device location altitude
///
public float altitude;
///
/// Horizontal accuracy of the location.
///
public float horizontalAccuracy;
///
/// Vertical accuracy of the location.
///
public float verticalAccuracy;
///
/// Timestamp (in seconds since 1970) when location was last time updated
///
public double timestamp;

public string error = null;public LocationError errcode = LocationError.ERROR_NONE;

}

public class LocationHelp : MonoBehaviour {

public static LocationHelp _instance=null;public static LocationHelp Instance{    get { return _instance; }}void Awake(){    _instance = this;}public delegate void GetLocationCallback(LocationInfo location);public static GetLocationCallback GetUserLocation;public void GetLocation(GetLocationCallback callback){      StartCoroutine(GetGPS(callback));}IEnumerator GetGPS(GetLocationCallback callback){    LocationInfo info = new LocationInfo();    if (!Input.location.isEnabledByUser)    {        info.errcode = LocationError.ERROR_NOT_ENABLED;        info.error = "用户未开启GPS";        Debug.Log("用户未开启GPS");        callback(info);        yield break;    }  //  Input.location.Start();    Input.location.Start(5.0f, 5.0f);    int maxWait = 5;    while (Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)    {        yield return new WaitForSeconds(1);        maxWait--;    }    if (maxWait < 1)    {        info.errcode = LocationError.ERROR_TIMEOUT;        info.error = "获取GPS信息超时";        Debug.Log("获取GPS信息超时");        callback(info);        yield break;    }    if(Input.location.status == LocationServiceStatus.Failed)    {        info.errcode = LocationError.ERROR_FAILED;        info.error = "获取GPS信息失败";        Debug.Log("获取GPS信息失败");        callback(info);        yield break;    }    info.latitude = Input.location.lastData.latitude;    info.longitude = Input.location.lastData.longitude;    info.altitude = Input.location.lastData.altitude;    info.horizontalAccuracy = Input.location.lastData.horizontalAccuracy;    info.verticalAccuracy = Input.location.lastData.verticalAccuracy;    info.timestamp = Input.location.lastData.timestamp;    callback(info);}

}