Ios Monotouch：获取用户当前lcoation

如何在monotouch中获取使用位置？ 我正在尝试使用以下代码，但任何事件都不会触发（AuthorizationChanged&LocationsUpdated）
我该怎么办？请建议

public Task<CLLocation> test()
{
    TaskCompletionSource<CLLocation> objTaskCompletionSource1 = new TaskCompletionSource<CLLocation> ();
    CLLocation currentLocation = null;
    CLLocationManager LocMgr = new CLLocationManager ();
    if (CLLocationManager.LocationServicesEnabled) 
    {
        LocMgr.LocationsUpdated += (object sender, CLLocationsUpdatedEventArgs e) => 
        {
            currentLocation = e.Locations [e.Locations.Length - 1];
            locationUpdated = false;
            if (currentLocation != null && AllAreas != null) 
            {
                LocationDetector.Instance.UpdateCurrentArea (new RLatLng (currentLocation.Coordinate.Latitude, currentLocation.Coordinate.Longitude));
                objTaskCompletionSource1.SetResult(currentLocation);
            }
            else
            {
                currentLocation = null;
                objTaskCompletionSource1.SetResult(currentLocation);
            }
        };
        LocMgr.AuthorizationChanged+= (object sender, CLAuthorizationChangedEventArgs e) => {
            Console.WriteLine("AuthorizationChanged Fired");
        };
        LocMgr.Failed += (object sender, NSErrorEventArgs e) => 
        {

        };
        LocMgr.StartUpdatingLocation ();
    } 
    else 
    {
        currentLocation = null;
        objTaskCompletionSource1.SetResult (currentLocation);
        Console.WriteLine ("Location services not enabled, please enable this in your Settings");
    }
    return objTaskCompletionSource1.Task;
}

公共任务测试（）
{
TaskCompletionSource objTaskCompletionSource1=新TaskCompletionSource（）；
CLLocation currentLocation=null；
CLLocationManager LocMgr=新的CLLocationManager（）；
如果（CLLocationManager.LocationServicesEnabled）
{
LocMgr.LocationsUpdated+=（对象发送方，CLLocationsUpdatedEventArgs e）=>
{
currentLocation=e.位置[e.位置.长度-1]；
位置更新=错误；
if（currentLocation！=null&&allreas！=null）
{
LocationDetector.Instance.UpdateCurrentArea（新的RLatLng（currentLocation.Coordinate.Latitude，currentLocation.Coordinate.Longitude））；
objTaskCompletionSource1.SetResult（当前位置）；
}
其他的
{
currentLocation=null；
objTaskCompletionSource1.SetResult（当前位置）；
}
};
LocaMgr.AuthorizationChanged+=（对象发送方，CLAuthorizationChangedEventArgs e）=>{
Console.WriteLine（“授权已更改”）；
};
LocMgr.Failed+=（对象发送方，NSErrorEventArgs e）=>
{
};
LocMgr.StartUpdatingLocation（）；
} 
其他的
{
currentLocation=null；
objTaskCompletionSource1.SetResult（当前位置）；
Console.WriteLine（“未启用位置服务，请在您的设置中启用此功能”）；
}
返回objTaskCompletionSource1.Task；
}

您可能正在iOS 8上测试此功能

对于iOS 8，您现在需要请求授权

因此，在您的ViewDidLoad中使用类似以下内容（使LocMgr类作用域级别-因此在您的版本中删除本地实例）：-

此外，为了使上述内容起作用，并使对话框显示，您还需要在info.plist中添加以下条目：-

<key>NSLocationWhenInUseUsageDescription</key>
<value>{some message that will be shown to the end-user}</value>

        LocMgr = new CLLocationManager ();
        if (UIDevice.CurrentDevice.CheckSystemVersion (8, 0)) {
            LocMgr.RequestWhenInUseAuthorization ();
        }

        UIButton objButton1 = new UIButton (UIButtonType.RoundedRect);
        objButton1.SetTitle ("Click Me", UIControlState.Normal);
        objButton1.TouchUpInside += (async (o2, e2) => {
            CLLocation objLocationInfo = await Test1();
            Console.WriteLine("Completed");
        });
        this.View = objButton1;

以及Test1函数：-

    public Task<CLLocation> Test1()
    {
        TaskCompletionSource<CLLocation> objTaskCompletionSource1 = new TaskCompletionSource<CLLocation> ();
        CLLocation currentLocation = null;
        if (CLLocationManager.LocationServicesEnabled) {
            LocMgr.LocationsUpdated += (object sender, CLLocationsUpdatedEventArgs e) => {
                currentLocation = e.Locations [e.Locations.Length - 1];
                locationUpdated = false;
                //if (currentLocation != null && AllAreas != null) {
                if (currentLocation != null) {
                    //LocationDetector.Instance.UpdateCurrentArea (new RLatLng (currentLocation.Coordinate.Latitude, currentLocation.Coordinate.Longitude));
                    objTaskCompletionSource1.SetResult (currentLocation);
                } else {
                    currentLocation = null;
                    objTaskCompletionSource1.SetResult (currentLocation);
                }
            };
            LocMgr.AuthorizationChanged += (object sender, CLAuthorizationChangedEventArgs e) => {
                Console.WriteLine ("AuthorizationChanged Fired");
            };
            LocMgr.Failed += (object sender, NSErrorEventArgs e) => {
                Console.WriteLine("AHH Failed");
            };
            LocMgr.StartUpdatingLocation ();
        } else {
            currentLocation = null;
            objTaskCompletionSource1.SetResult (currentLocation);
            Console.WriteLine ("Location services not enabled, please enable this in your Settings");
        }
        return objTaskCompletionSource1.Task;
    }

请记住，您还需要编辑您的info.plist

---

如果然后运行该示例，请在

Console.WriteLine（“Completed”）上放置断点

然后您应该能够检查

objLocationInfo

并查看它是否有位置。

我将LocMgr更改为全局，但事件不会触发：（@Chris如果您发送电子邮件，我会将您修改过的版本发送给您。它只包括我在上面所做的更改，但在iOS 8上对我有效。您能添加检索用户位置的完整代码吗？它显示对话框，但我的事件不会触发Hanks，我正在尝试使用您的代码，我可以使用我的类con吗拖拉机而不是viewDidLoad？因为我有单独的非视图类

    public Task<CLLocation> Test1()
    {
        TaskCompletionSource<CLLocation> objTaskCompletionSource1 = new TaskCompletionSource<CLLocation> ();
        CLLocation currentLocation = null;
        if (CLLocationManager.LocationServicesEnabled) {
            LocMgr.LocationsUpdated += (object sender, CLLocationsUpdatedEventArgs e) => {
                currentLocation = e.Locations [e.Locations.Length - 1];
                locationUpdated = false;
                //if (currentLocation != null && AllAreas != null) {
                if (currentLocation != null) {
                    //LocationDetector.Instance.UpdateCurrentArea (new RLatLng (currentLocation.Coordinate.Latitude, currentLocation.Coordinate.Longitude));
                    objTaskCompletionSource1.SetResult (currentLocation);
                } else {
                    currentLocation = null;
                    objTaskCompletionSource1.SetResult (currentLocation);
                }
            };
            LocMgr.AuthorizationChanged += (object sender, CLAuthorizationChangedEventArgs e) => {
                Console.WriteLine ("AuthorizationChanged Fired");
            };
            LocMgr.Failed += (object sender, NSErrorEventArgs e) => {
                Console.WriteLine("AHH Failed");
            };
            LocMgr.StartUpdatingLocation ();
        } else {
            currentLocation = null;
            objTaskCompletionSource1.SetResult (currentLocation);
            Console.WriteLine ("Location services not enabled, please enable this in your Settings");
        }
        return objTaskCompletionSource1.Task;
    }

    private bool locationUpdated = false;
    private CLLocation currentLocation = null;

    private CLLocationManager LocMgr;