Zoom in a MKMapView programmatically

Question

I\'m using a MKMapView inside an iPhone app. When I click a button the zoom level must increase. This is my first approach:

MKCoordinateRegion z         


        

Answer 1

mapView.setRegion method has problem when your map is rotated

You can zoom map via mapView.camera.altitude property, but it is not animated:

mapView.camera.altitude *= 1.05

You can create new camera object and set it with animation:

let currentCamera = mapView.camera
let newCamera: MKMapCamera
if #available(iOS 9.0, *) {
    newCamera = MKMapCamera(lookingAtCenter: currentCamera.centerCoordinate, fromDistance: currentCamera.altitude * 2, pitch: currentCamera.pitch, heading: currentCamera.heading)
} else {
    newCamera = MKMapCamera()
    newCamera.centerCoordinate = currentCamera.centerCoordinate
    newCamera.heading = currentCamera.heading
    newCamera.altitude = currentCamera.altitude * 2
    newCamera.pitch = currentCamera.pitch
}

mapView.setCamera(newCamera, animated: true)