Ndtyjky

I have requirement like on my current location one view will display. It will rotate if device was rotate or location will be change.I research lot but got all the code which have a fix location or angle at some location but i haven't fix location. Can anyone drive me at right direction.

I also used rotation property of the GMSMarker but it is not working.

- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading

{

    if (newHeading.headingAccuracy < 0){

        NSLog(@"heading accuracy < 0");

        return;

    }



    // Convert Degree to Radian and move the needle

    float oldRad =  (- manager.heading.trueHeading) * M_PI / 180.0f;

    float newRad =  (- newHeading.trueHeading) * M_PI / 180.0f;



    // Compass animation

    CABasicAnimation *theAnimation;

    theAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];

    theAnimation.fromValue = [NSNumber numberWithFloat:oldRad];

    theAnimation.toValue   = [NSNumber numberWithFloat:newRad];

    theAnimation.duration  = 0.5f;

    [source.layer addAnimation:theAnimation forKey:@"animateMyRotation"];



//    source.transform =  CGAffineTransformMakeRotation(newRad)

//    GMSMarker *source = [googleMap selectedMarker];

//    source.rotation = newRad;

}

Update: I have rotation method but is there any way to rotate the GMSMarker because there is no method for transform.

How uber rotate their car in google map?

Current location 'CLLocation' object has a property called 'course'

@property(readonly, nonatomic) CLLocationDirection course;

of type CLLocationDirection(typedef of double) which is an angle of the location.

For car to rotate, You need extra field in your backend, direction, along with latitude and longitude. Use this information to rotate car by applying Transform on UIView

CGAffineTransformMakeRotation(M_PI * (course_of_location) / 180.0);

We can rotate image based on course property CLLocation Class

    let marker:GMSMarker = GMSMarker.init(position: currentLocation!)

    let head = locationManager.location?.course ?? 0

    marker.rotation = head

    marker.icon = UIImage(named: "testyCar.png")

    marker.map = mapView 

you can do something like -

-(void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading {



    CLLocationDirection direction = newHeading.trueHeading;

    lastDriverAngleFromNorth = direction;

    self.driverMarker.rotation = lastDriverAngleFromNorth - mapBearing;

}



#pragma mark - GMSMapViewDelegate



- (void)mapView:(GMSMapView *)mapView didChangeCameraPosition:(GMSCameraPosition *)position {



    mapBearing = position.bearing;

    self.driverMarker.rotation = lastDriverAngleFromNorth - mapBearing;

}

//just do this only

- (void)locationManager:(CLLocationManager *)manager  didUpdateHeading:(CLHeading *)newHeading

{

   double heading = newHeading.trueHeading;

   marker.groundAnchor = CGPointMake(0.5, 0.5);

   marker.rotation = heading;

   marker.map = mapView;

}

marker.rotation = course_of_location;

Note: rotation to pin will happen only during movement. in case of static device there will be -1 value of location.course. Also this have no relation with device orientation. If you are looking to move pin according to device heading then do this

- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading {

marker.rotation =  (manager.heading.trueHeading) * M_PI / 180.0f; }