LocationService.Start

参数

说明

启动位置服务更新。

调用此函数后，可以通过选中Input.location中的lastData访问设备最近的位置坐标。

注意：位置服务并不会立即开始发送位置数据。因此，请在Input.location中检查当前服务状态。

在 Android 设备上，脚本中使用此方法会自动将ACCESS_FINE_LOCATION权限添加到 Android 清单中。如果使用 500 或更高之类的低精度值，请在Player Settings中选择低精度位置，以添加ACCESS_COARSE_LOCATION权限。

在 WebGL 设备上，此方法必须在协程中作为对用户手势（如鼠标点击）的响应而调用。注意：地理位置服务仅在 HTTPS 连接下可用，在开发过程中使用 http://localhost 时除外。desiredAccuracyInMeters和updateDistanceInMeters的使用不受支持，因为用户设备确定这两个值。

using UnityEngine;
using System.Collections;

public class TestLocationService : MonoBehaviour
{
    IEnumerator Start()
    {
        // Check if the user has location service enabled.
        if (!Input.location.isEnabledByUser)
            Debug.Log("Location not enabled on device or app does not have permission to access location");

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

        // Waits until the location service initializes
        int maxWait = 20;
        while (Input.location.status == LocationServiceStatus.Initializing && 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)
        {
            Debug.Log("Timed out");
            yield break;
        }

        // If the connection failed this cancels location service use.
        if (Input.location.status == LocationServiceStatus.Failed)
        {
            Debug.LogError("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.
            Debug.Log("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();
    }
}