Question

想要使用mapkit和核心位置在地图中指定用户移动路线上的汽车/自行车。怎么可能？是否可以通过查找谷歌地图的方向程度？如果是，那么那个数学公式是什么？

我已经为CLLocation尝试过课程属性，但始终给出-1值，表示无效方向。

- (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];
    }
    annotationView.image = [UIImage imageNamed:@"Bike.png"];
    annotationView.transform = CGAffineTransformMakeRotation(45);

    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];
    }
}

Answer 1

我参与了一个名为“JogBuddy”的类似宠物项目。它并不完美但你可以肯定地检查出来：

https://github.com/azamsharp/JogBuddy

想要跟踪用户移动的路线

1 个答案: