iphone - 根据用户在 map 中跟随的方向旋转图像

我想按照用户跟随的方向旋转自行车/汽车图像。现在图像跟随方向但看起来没有方向性，我们可以说点不跟随方向:

- (MKAnnotationView *)mapViewMKMapView *)map viewForAnnotationid <MKAnnotation>)annotation
{
    static NSString *AnnotationViewID = @"annotationViewID";

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

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

    annotationView.image = [UIImage imageNamed"Bike.png"];
    annotationView.annotation = annotation;

    return annotationView;
}

- (void)locationManagerCLLocationManager *)manager didUpdateToLocationCLLocation *)newLocation fromLocationCLLocation *)oldLocation
{
    if (newLocation.horizontalAccuracy < 0)
        return;
    if  (!newLocation)
        return;

    currentLocation = newLocation;
    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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Best Answer-推荐答案

查看核心位置的 -[CLLocationManagerDelegate locationManager:didUpdateHeading:]。

关于iphone - 根据用户在 map 中跟随的方向旋转图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18614680/