Ios 打开应用程序时获取当前位置

您好，在我的应用程序中，我必须显示从当前位置到目的地位置的路线图。为此，我使用

googlemap

URL来显示路线图，一切正常。但问题是，当它第一次安装应用程序时，它得到的是现金，而不是当前位置

当我最小化应用程序时，它会显示如下警告消息

"appname" would like to use Your current Location

单击“确定”后，我已关闭应用程序并再次打开它，现在它将显示路线图

我的密码

-(void)currentlocation{
     locationManager = [[CLLocationManager alloc]init];

     locationManager.delegate = self;


     locationManager.distanceFilter = kCLDistanceFilterNone;


     locationManager.desiredAccuracy = kCLLocationAccuracyBest;


     [locationManager startUpdatingLocation];


     [self->locationManager startUpdatingLocation];


      CLLocation *location = [locationManager location];


      CLLocationCoordinate2D coordinate = [location coordinate];

      mapView = [[[MapView alloc] initWithFrame:
            CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)] autorelease];

    [self.view addSubview:mapView];

   Place* home = [[[Place alloc] init] autorelease];
    home.name = @"Home";
    home.description = @"Sweet home";
    home.latitude = 13.0051850;
    home.longitude = 77.62698590;

       Place* office = [[[Place alloc] init] autorelease];
    office.name = @"Office";
    office.description = @"Bad office";
    office.latitude = coordinate.latitude;
    office.longitude = coordinate.longitude;

        [mapView showRouteFrom:home to:office];

    }

我已经使用了上面的代码，我想当用户打开应用程序时，它必须显示警报，一旦用户单击“确定”，它就会显示路线图，请告诉我如何实现我在这里被困了很长时间，请帮助我

谢谢。

试试这个

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    if (currentLocation != nil) {

        Place* home = [[[Place alloc] init] autorelease];
        home.name = @"Home";
        home.description = @"Sweet home";
        home.latitude = 13.0051850;
        home.longitude = 77.62698590;

        Place* office = [[[Place alloc] init] autorelease];
        office.name = @"Office";
        office.description = @"Bad office";
        office.latitude = currentLocation.coordinate.latitude;
        office.longitude = currentLocation.coordinate.longitude;
        [mapView showRouteFrom:home to:office];


    }
    // Stop Location Manager
    [locationManager stopUpdatingLocation];
}