CODEWITHSUNDEEP
iosswiftgoogle-maps
puks1978
puks1978

Reputation: 3697

Fit entire Google Map in zoom level in Swift project

I have a google map with a bunch of coordinates

path.addCoordinate(CLLocationCoordinate2DMake(-37.813047, 144.959911))
path.addCoordinate(CLLocationCoordinate2DMake(-37.814895, 144.960759))
path.addCoordinate(CLLocationCoordinate2DMake(-37.814361, 144.963140))
path.addCoordinate(CLLocationCoordinate2DMake(-37.812386, 144.962239))

I would like the map to be automatically zoomed to the best level based on the points however I can't find anything relating to this.

I have this working:

var vancouver = CLLocationCoordinate2DMake(-37.813047, 144.959911)
var calgary = CLLocationCoordinate2DMake(-37.814361, 144.963140)
var bounds = GMSCoordinateBounds(coordinate: vancouver, coordinate: calgary)
var camera = viewMap.cameraForBounds(bounds, insets:UIEdgeInsetsZero)
viewMap.camera = camera

however it only accepts 2 coordinates where I may have up to 100

Thanks

Upvotes: 4

Views: 5759

Answers (3)

ztan
ztan

Reputation: 6921

You can use GMSCoordinateBounds(path:) to fit all coordinates. But it will display a world size scale if you update the camera right after your another update. So you can use dispatch_after to solve the problem. 

 override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor.whiteColor();
        let camera = GMSCameraPosition.cameraWithLatitude(-37.813047, longitude: -72.8561644, zoom:5)
        mapView = GMSMapView.mapWithFrame(CGRectZero, camera:camera)

        let marker = GMSMarker()
        marker.position = camera.target
        marker.snippet = "Hello World"
        marker.appearAnimation = kGMSMarkerAnimationPop
        marker.map = mapView

        self.view = mapView

        delay(seconds: 2) { () -> () in
            let path = GMSMutablePath()
            path.addCoordinate(CLLocationCoordinate2DMake(37.36, -122.0))
            path.addCoordinate(CLLocationCoordinate2DMake(37.45, -122.0))
            path.addCoordinate(CLLocationCoordinate2DMake(37.45, -122.2))
            path.addCoordinate(CLLocationCoordinate2DMake(37.36, -122.2))
            path.addCoordinate(CLLocationCoordinate2DMake(37.36, -122.0))

            let rectangle = GMSPolyline(path: path)
            rectangle.map = self.mapView

            let bounds = GMSCoordinateBounds(path: path)

            self.mapView!.animateWithCameraUpdate(GMSCameraUpdate.fitBounds(bounds, withPadding: 15.0))
        }
    }

The delay method uses the dispatch_after:

func delay(#seconds: Double, completion:()->()) {
    let popTime = dispatch_time(DISPATCH_TIME_NOW, Int64( Double(NSEC_PER_SEC) * seconds ))

    dispatch_after(popTime, dispatch_get_main_queue()) {
        completion()
    }
}

enter image description here

Upvotes: 9

picciano
picciano

Reputation: 22701

Iterate through your points. The southwest corner is the minimum latitude and longitude. The northeast corner is the maximum latitude and longitude. Once you have those two points, pass them into your cameraForBounds method.

Upvotes: 0

Bosco Noronha
Bosco Noronha

Reputation: 41

Try finding an optimal viewing box on google maps by:

-Clicking on the north east corner of the area you think will cover the coordinates in a browser. Note the lat & long.

-Then click the south east corner in the same area which you think will enclose all the coordinates & note the lat & long.

Put the latitudes & longitudes in the respective variables of the below code:

var southWest = CLLocationCoordinate2DMake(latitide,longititude)
var northEast = CLLocationCoordinate2DMake(latitude,longitude)
var bounds = GMSCoordinateBounds(coordinate: northEast, coordinate: southWest)
var camera = mapView.cameraForBounds(bounds, insets:UIEdgeInsetsZero)
mapView.camera = camera;

Upvotes: -1

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