What is the best way to use MKMapCamera

Question

I've found three ways to use the MKMapCamera and I want to know which one is the most recommended one. My goal is to follow the user and I want to update the camera on each location update (so each second).

1.

            MKMapCamera *newCamera = [MKMapCamera camera];
            [newCamera setCenterCoordinate:newCoordinate];
            [newCamera setPitch:60];
            [newCamera setHeading:heading];
            [newCamera setAltitude:eyeAltitude];
            [mapView setCamera:newCamera];

2.

            MKMapCamera *newCamera = [MKMapCamera cameraLookingAtCenterCoordinate:newCoordinate
                                                             fromEyeCoordinate:oldCoordinate
                                                                   eyeAltitude:eyeAltitude];
            [newCamera setPitch:pitch];

            [mapView setCamera:newCamera];

3.

            MKMapCamera *oldCamera = mapView.camera;
            [oldCamera setCenterCoordinate:newCoordinate];
            [oldCamera setPitch:60];
            [oldCamera setHeading:heading];
            [oldCamera setAltitude:eyeAltitude];

Memory wise seems nr 3 the most decent one or is it a singleton class? In most examples they use nr1.

For nr3 I can't get the animation to work.

Thanks!

I know is a bit late, and it may have just been in Objective-C that the animation was not working, but I have used all of your suggestions and they all animate in Swift 5. See my answer below. I find that setting the different properties on `MKMapCamera` is better than calling `setCamera` every time. — Jav Solo, Mar 10 '21 at 21:28

score 4 · Answer 1 · answered Dec 19 '14 at 10:42

4

Using the MKMapCamera, you can set the orientation of a map without messing with transforms on the view or even detecting the user’s heading.

MKMapCamera *mapCamera = [[self.mvMap camera] copy];
[mapCamera setHeading:headingDegrees]; 
[self.mvMap setCamera:mapCamera animated:YES];

If you don’t want the animation, you can just set the new heading on the existing camera:

[self.mapView.camera setHeading:heading];

answered Dec 19 '14 at 10:42

Rameshwar Gupta

791
7
21

I'm not sure how this would help me :) – Sjoerd Perfors Dec 19 '14 at 14:12

Jav Solo · Answer 2 · 2021-03-10T21:26:02.900

0

Updated answer in Swift 5

The code below worked for me without calling setCamera

let mapCamera = self.mapView.camera
mapCamera.heading = headingInDegrees
mapCamera.centerCoordinate = newCoordinate

You can also just set the new heading on the existing camera like so:

self.mapView.camera.heading = headingInDegrees

edited Mar 10 '21 at 21:26

answered Mar 08 '21 at 21:16

Jav Solo

576
1
6
15

What is the best way to use MKMapCamera

2 Answers2