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我已将此标志设置为 info.plist 文件：所需的设备功能 - gps 和磁力计

但是输出日志始终显示课程值 -1，以下是日志：

2013-09-09 11:05:09.930 MapApp[143:907] <+23.05910024,+72.53762685> +/- 65.00m（速度 -1.00 mps / 路线 -1.00）@ 09/09/13 11:05:00 AM印度标准时间

@interface MAViewController : UIViewController <MKMapViewDelegate,CLLocationManagerDelegate>
{
    CLLocation *currentLocation;
    CLLocation *previousLocation;
    CLLocationManager *callMethod;
    MyAnnotation *myAnnotation;
    MKAnnotationView *annotationView;
}
@property (nonatomic, retain) IBOutlet UIImageView *bike;

@end


- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
{
    static NSString *AnnotationViewID = @"annotationViewID";

    annotationView = (MKAnnotationView *)[map dequeueReusableAnnotationViewWithIdentifier:AnnotationViewID];

    if (annotationView == nil)
    {
        annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationViewID] autorelease];
    }

    NSLog("%@",currentLocation.course);

    self.bike.transform = CGAffineTransformMakeRotation(45);
    annotationView.image = self.bike.image;

    return annotationView;
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    if (newLocation.horizontalAccuracy < 0)
        return;
    if  (!newLocation)
        return;
    currentLocation = newLocation;
    previousLocation = oldLocation;
    if(currentLocation != nil)
    {
        if (myAnnotation)
        {
            [self.myMapView removeAnnotation:myAnnotation];
        }
        CLLocationCoordinate2D location = CLLocationCoordinate2DMake(currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
        myAnnotation = [[MyAnnotation alloc] initWithCoordinates:location title:@"Current Location" subTitle:nil];
        [self.myMapView addAnnotation:myAnnotation];
    }
}
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1 回答 1

1

您的日志显示速度也无效。所以你是

要么：
- 不移动
- 或者更可能的是，您不使用 GPS 作为定位服务：将准确度设置为 CLLAccuracyBest 以确保您获得 GPS 位置。当然和速度，不适用于手机信号塔或 wifi 定位。

于 2013-09-15T13:56:49.847 回答