地理定位即使在设备上也不起作用

Question

我在模拟器上苦苦挣扎，但最近，我直接在设备 (iPhone) 上对其进行了测试，但同样的问题仍然存在，这是我的应用程序完成启动后得到的结果，并且地理定位代码假设给了我我的地图上的位置（请记住，上图是我在 iPhone 上的应用，而不是模拟器）：

所以对于我的代码，我的应用程序实际上有很多视图，但是关于这个功能，我已经研究了 appdelegate(.m 和 .h) 以及关于在地图上显示位置的视图 (PositionActuelleViewController)。

appdelegate.m：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    sleep(3);




    // Override point for customization after application launch.

    self.locationManager=[[[CLLocationManager alloc] init] autorelease];

    if([CLLocationManager locationServicesEnabled]) {
        self.locationManager.delegate=self;
        self.locationManager.distanceFilter=100;
        [self.locationManager startUpdatingLocation];

    }


        // Add the view controller's view to the window and display.
    [window addSubview:viewController.view];
    [window makeKeyAndVisible];

    return YES;
}

在dealloc方法之后的同一个文件中：

     #pragma mark CLLocationManagerDelegate Methods


    -(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation    {

        MKCoordinateSpan span;
        span.latitudeDelta=0.2;
        span.longitudeDelta=0.2;


        MKCoordinateRegion region;
        region.span=span;
        region.center=newLocation.coordinate;
        [viewCont.mapView setRegion:region animated:YES];

        viewCont.mapView.showsUserLocation=YES;
        viewCont.latitude.text=[NSString stringWithFormat:@"%f",newLocation.coordinate.latitude];
        viewCont.longitude.text=[NSString stringWithFormat:@"%f",newLocation.coordinate.longitude];

}

我的 PositionActuelleViewController.m 文件：

#import "PositionActuelleViewController.h"
@implementation PositionActuelleViewController

@synthesize mapView;
@synthesize latitude;
@synthesize longitude;

-(IBAction)goBackToMenu {
    [self dismissModalViewControllerAnimated:YES];
}
-(IBAction)goToRechercherView;
{
    rechercherViewController.modalTransitionStyle=UIModalTransitionStyleFlipHorizontal;

    [self  presentModalViewController:rechercherViewController animated:YES];

}

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)dealloc {
    [mapView release];
    [latitude release];
    [longitude release];
    [super dealloc];
}
@end

我在这里错过了什么？

Answer 1

委托方法-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation 是否被调用过？也许如果您取消注释 self.locationManager.distanceFilter=100; 它将起作用，因为根据文档，distanceFilter 属性定义了设备在生成更新事件之前必须横向移动的最小距离（以米为单位）。