LocationService.Start

public void Start ();

public void Start (float desiredAccuracyInMeters);

public void Start (float desiredAccuracyInMeters, float updateDistanceInMeters);

参数

desiredAccuracyInMeters	The service accuracy you want to use, in meters. This determines the accuracy of the device's last location coordinates. Higher values like 500 don't require the device to use its GPS chip and thus save battery power. Lower values like 5-10 provide the best accuracy but require the GPS chip and thus use more battery power. The default value is 10 meters.
updateDistanceInMeters	The minimum distance, in meters, that the device must move laterally before Unity updates Input.location. Higher values like 500 produce fewer updates and are less resource intensive to process. The default is 10 meters.

描述

Starts location service updates.

After you call this function, you can access the device's last location coordinates. To do this, check lastData in Input.location.

Note: The location service doesn't start to send location data immediately. Check status in Input.location for the current service status.

On Android, using this method in a scripts automatically adds the ACCESS_FINE_LOCATION permission to the android manifest. If you use low accuracy values like 500 or higher, you can select Low Accuracy Location in Player Settings to add the ACCESS_COARSE_LOCATION permission instead.

using UnityEngine;
using System.Collections;

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

        // Starts the location service.
        Input.location.Start();

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

        // If the service didn't initialize in 20 seconds this cancels location service use.
        if (maxWait < 1)
        {
            print("Timed out");
            yield break;
        }

        // If the connection failed this cancels location service use.
        if (Input.location.status == LocationServiceStatus.Failed)
        {
            print("Unable to determine device location");
            yield break;
        }
        else
        {
            // If the connection succeeded, this retrieves the device's current location and displays it in the Console window.
            print("Location: " + Input.location.lastData.latitude + " " + Input.location.lastData.longitude + " " + Input.location.lastData.altitude + " " + Input.location.lastData.horizontalAccuracy + " " + Input.location.lastData.timestamp);
        }

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

脚本 API

LocationService.Start

参数

描述