MapView Camera not changing in iOS Swift

Question

I would appreciate some help for my problem, I am creating a view called mapView and have changed its class to GMSMapView. But when I assign the map to this mapView, the layout is perfectly fine but the camera is set to Europe by default, which does not change.

Following is the code:

 @IBOutlet weak var mapView: GMSMapView!
var latitudes = [19.199782,19.19855,19.199179]
var longitudes = [72.8734634,72.872935, 72.874535]
var titles = ["Riviera","Alica","Senate"]
var subTitle = ["1","2","3"]
override func viewDidLoad() {
    super.viewDidLoad()

    let camera = GMSCameraPosition.camera(withLatitude: 19.20060, longitude: 72.8734462, zoom: 15.0)
    let mapView1 = GMSMapView.map(withFrame: CGRect.zero, camera: camera)


    let path = GMSMutablePath()


    for i in 0...2
    {
        let marker = GMSMarker()
        marker.position = CLLocationCoordinate2D(latitude: latitudes[i], longitude: longitudes[i])
        marker.title = titles[i]

        marker.snippet = subTitle[i]
        marker.map = mapView1
        path.add(CLLocationCoordinate2D(latitude: latitudes[i], longitude: longitudes[i]))
    }

    let polyLine = GMSPolyline(path: path)

    polyLine.map = mapView1


    mapView = mapView1
    mapView.camera = camera

}

The output for the code is: Output

When I add the map to view I get the desired map

modification to above code: instead of mapView = mapView1 put view = mapView1

Desired output:Desired Output

So please help me getting the desired output in the mapView view of my screen. Thank You!

Why have you created the new variable mapView1? You can assign directly the properties to your mapView. — DionizB, Mar 29 '18 at 17:05

Pheepster · Answer 1 · 2018-03-30T16:33:42.563

The GMSMapView class has the following function:

animate(to:GMSCameraPosition)

So in your code, instead of setting the camera property on your mapview, do this:

mapView.animate(to: camera)

Hope this helps!

Edit

After looking more into this code, I believe your mapView1 is unnecessary and causing problems with your outlet. Try something like this:

override func viewDidLoad() {
    super.viewDidLoad()

    let camera = GMSCameraPosition.camera(withLatitude: 19.20060, longitude: 72.8734462, zoom: 15.0)
    let path = GMSMutablePath()

    for i in 0...2
    {
        let marker = GMSMarker()
        marker.position = CLLocationCoordinate2D(latitude: latitudes[i], longitude: longitudes[i])
        marker.title = titles[i]

        marker.snippet = subTitle[i]
        marker.map = mapView
        path.add(CLLocationCoordinate2D(latitude: latitudes[i], longitude: longitudes[i]))
    }

    let polyLine = GMSPolyline(path: path)
    polyLine.strokeWidth = 2.0
    polyLine.strokeColor = .black
    polyLine.map = mapView

    mapView.animate(to: camera)
}

On a side note I would also suggest replacing your four arrays with one array of dictionary objects each containing a title, subtitle, latitude and longitude, or something like that. Then change your for loop to accommodate

@NewCoder Edited my original post – Pheepster Mar 30 '18 at 16:21 — Pheepster, Mar 30 '18 at 16:21

score 0 · Answer 2 · answered Mar 30 '18 at 08:35

I would suggest setting view's class to UIView, since you create the mapView1 programmatically and then after initializing mapView1

let mapView1 = GMSMapView.map(withFrame: CGRect.zero, camera: camera)

add it to the view as addSubview(mapView1).

Hope this helps you!

MapView Camera not changing in iOS Swift

2 Answers2

Edit