LocationService.Start

描述

启动位置服务更新。可能是上次位置坐标。

Retrieved via Input.location.lastData. Service does not start to send location data immediately. Code should check Input.location.status for current service status. desiredAccuracyInMeters - desired service accuracy in meters. Using higher value like 500 usually does not require to turn GPS chip on and thus saves battery power. Values like 5-10 could be used for getting best accuracy. Default value is 10 meters. updateDistanceInMeters - the minimum distance (measured in meters) a device must move laterally before Input.location property is updated. Higher values like 500 imply less overhead. Default is 10 meters.

using UnityEngine;
using System.Collections;

public class TestLocationService : MonoBehaviour
{
    IEnumerator Start()
    {
        // First, check if user has location service enabled
        if (!Input.location.isEnabledByUser)
            yield break;

        // Start service before querying location
        Input.location.Start();

        // Wait until service initializes
        int maxWait = 20;
        while (Input.location.status == LocationServiceStatus.Initializing && maxWait > 0)
        {
            yield return new WaitForSeconds(1);
            maxWait--;
        }

        // Service didn't initialize in 20 seconds
        if (maxWait < 1)
        {
            print("Timed out");
            yield break;
        }

        // Connection has failed
        if (Input.location.status == LocationServiceStatus.Failed)
        {
            print("Unable to determine device location");
            yield break;
        }
        else
        {
            // Access granted and location value could be retrieved
            print("Location: " + Input.location.lastData.latitude + " " + Input.location.lastData.longitude + " " + Input.location.lastData.altitude + " " + Input.location.lastData.horizontalAccuracy + " " + Input.location.lastData.timestamp);
        }

        // Stop service if there is no need to query location updates continuously
        Input.location.Stop();
    }
}