无论我怎么做，MKMapView 和位置管理器总是返回 0,0

Question

我尝试了大约 100 种不同的解决方案，但 locationManager 始终返回坐标 0,0。

而且...从来没有，也没有一次调用过 didUpdateLocations：

我找到了一个代码，可以确保手机上的所有东西都正常打开……仍然没有。

我可以做一些与源代码无关的错误吗？

我最近的尝试使用一个按钮来设置整个物体的运动，但正如我所说.. 仍然是 0,0.. 它会放大并完美地移动到那个位置。

这是怎么回事.. 使用最新软件或其他软件的 iPhone 4s 是否无法使用位置？

一些代码不起作用....

.h

#import <UIKit/UIKit.h>
#import<MapKit/MapKit.h>
#import<CoreLocation/CoreLocation.h>

@interface TestingMapsFirstViewController : UIViewController <MKMapViewDelegate,      CLLocationManagerDelegate>
{
    CLLocationManager *locationManager;
    CLLocation *currentLocation;
}

@property (weak, nonatomic) IBOutlet MKMapView *mapView;
property (weak, nonatomic) IBOutlet UIButton *locationButton;
property (strong, nonatomic) CLLocationManager *locationManager;
property (weak, nonatomic) IBOutlet NSString *test1;
property (weak, nonatomic) CLLocation *CURRENT_LOCATION;
end

.m

 -(void)viewDidLoad
{
[self.mapView setMapType:MKMapTypeStandard];
[self.mapView setZoomEnabled:YES];
[self.mapView setScrollEnabled:YES];
[self.mapView setShowsUserLocation:YES];
[super viewDidLoad];
 }


- (void)startUpdatingCurrentLocation
{
// if location services are on
if([CLLocationManager locationServicesEnabled])
{
    // if location services are restricted do nothing
    if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusRestricted )
    {
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Warning" message:@"Determining your current location cannot be performed at this time because location services are enabled but restricted." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [alertView show];
    }
    else
    {


        if(!self.locationManager)
        {
            self.locationManager = [[CLLocationManager alloc] init];
            self.locationManager.delegate = self;
            self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
            self.locationManager.distanceFilter = kCLDistanceFilterNone;
            self.locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
            [self.locationManager startUpdatingLocation];

          //  [_locationManager setDistanceFilter:5.0f];          // measured in meters
          //  [_locationManager setHeadingFilter:5];              // measured in degrees

            self.mapView.centerCoordinate = self.locationManager.location.coordinate;//self.mapView.userLocation.location.coordinate;
          //  [self.mapView setCenterCoordinate:self.mapView.userLocation.location.coordinate zoomLevel:2.0 animated:YES];

            NSLog(@"user latitude = %f",_locationManager.location.coordinate.latitude);
            NSLog(@"user longitude = %f",_locationManager.location.coordinate.longitude);
        }

        [_locationManager startUpdatingLocation];
    }
}
else
{
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Determining your current location cannot be performed at this time because location services are not enabled." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alertView show];
}
}

// Delegate method
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
CLLocation* loc = [locations lastObject]; // locations is guaranteed to have at least one object
float latitude = loc.coordinate.latitude;
float longitude = loc.coordinate.longitude;
NSLog(@"%.8f",latitude);
NSLog(@"%.8f",longitude);
}

我真的很感激我的问题的答案，感觉我在这里尝试了所有方法并且已经走到了尽头。

Answer 1

我从这个网站复制了代码，创建了一个新的应用程序并将代码粘贴到......它立即运行......所以问题解决了。

感谢您的努力。

Answer 2

代码没有问题，虽然有点乱。向下滚动查看证明。是否由于某种原因未调用委托您尚未允许该应用使用位置服务。转到 Settings/Privacy/LocationService 并找到您的应用程序以允许位置服务。它看起来像这样：

这是工作代码的证明：

-- 编辑 并确保将 CoreLocation 和 Mapkit 框架导入到您的项目中，如下所示：