Swift Mapkit max min zoom

Question

I can't seem to find the best answer to my question SO.

I have this code that is "OK" but not idea

func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {

        print(mapView.camera.altitude)
        if mapView.camera.altitude < 800.00 && !modifyingMap
        {
            modifyingMap = true
            mapView.camera.altitude = 800.00
            modifyingMap = false
        }
    }

I would like to limit a user's max and min zoom to my map in my app.

any links to the SO answer are greatly appreciated!

Thanks!

https://github.com/johndpope/MKMapViewZoom/blob/master/MKMapView%2BZoomLevel.m — PPL, Mar 19 '18 at 10:47
Take a look here. Swift 5, iOS 13 and later https://stackoverflow.com/a/68293072/6292624 — AlexR, Jul 07 '21 at 21:21

score 7 · Accepted Answer · answered Mar 20 '18 at 05:43

You could use the mapView:regionDidChangeAnimated: delegate method to listen for region change events, and if the region is wider/narrower than your maximum/minimum region, set it back to the max/min region with setRegion:animated: to indicate to your user that they can't zoom out/in that far.

e.g.

func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
    let coordinate = CLLocationCoordinate2DMake(mapView.region.center.latitude, mapView.region.center.longitude)
    var span = mapView.region.span
    if span.latitudeDelta < 0.002 { // MIN LEVEL
        span = MKCoordinateSpanMake(0.002, 0.002)
    } else if span.latitudeDelta > 0.003 { // MAX LEVEL
        span = MKCoordinateSpanMake(0.003, 0.003)
    }
    let region = MKCoordinateRegionMake(coordinate, span)
    mapView.setRegion(region, animated:true)
}

Thanks! that's what i needed! – Desmond Mar 20 '18 at 08:11 — Desmond, Mar 20 '18 at 08:11

score 4 · Answer 2 · answered Jun 19 '20 at 10:18

4

Try this out:

 mapView.cameraZoomRange = MKMapView.CameraZoomRange(
            minCenterCoordinateDistance: 1000, // Minimum zoom value
            maxCenterCoordinateDistance: 10000) // Max zoom value

answered Jun 19 '20 at 10:18

ExeRhythm

452
5
13

1

Only available in iOS 13 or newer. – dub Sep 23 '20 at 01:19

Swift Mapkit max min zoom

2 Answers2