Restrict MKMapView scrolling

Question

I\'m trying to add a custom image to an MKMapView as an MKOverlayView - I need to restrict users from being able to scroll outside the bounds of th

Answer 1

MapKit now does this natively in iOS 13

You can explicitly set a boundary to restrict panning.

let boundaryRegion = MKCoordinateRegion(...) // the region you want to restrict
let cameraBoundary = CameraBoundary(region: boundaryRegion)
mapView.setCameraBoundary(cameraBoundary: cameraBoundary, animated: true)

See WWDC 2019 video at 2378 seconds for a demonstration.

You can also restrict zoom levels

let zoomRange = CameraZoomRange(minCenterCoordinateDistance: 100,
    maxCenterCoordinateDistance: 500)
mapView.setCameraZoomRange(zoomRange, animated: true)

References

• MapKit documentation on "Constraining the Map View"
• class reference for MKMapView.CameraBoundary
• class reference for MKMapView.CameraZoomRange