I have created NMAMapView object using storyboard and I am using the reference of that NMAMapView object in view controller code and added markers to it. In this case, the markers are visible on the screen
To set the zoom automatically I created NMABoundingBox, added markers to it and then set the bounding box to NMAMapView using setBoundingBox::withAnimation method.
But if I create the NMAPMapView object dynamically, set the view controller view frame to the NMAMapView and add it as a subview to view controller view and then added the markers to the view, then the markers are visible out of the map. I have to do a manual zoom out on the map to see the markers.
I have also tried using setBoundingBox::insideRect::withAnimation method of NMAMapView for the above dynamically created map scenario to set the zoom automatically. But the maps is being pointed to some random portion of the world with some inappropriate zoom.
Need resolution for this issue. Thanks
In my case, I see a marker on the map only if some image is set as an icon of NMAMapMarker. Looks like there's no default marker available.
let coordinates: NMAGeoCoordinates = ...
let image: UIImage = ...
let marker = NMAMapMarker(geoCoordinates: coordinates, image: image)
or
let coordinates: NMAGeoCoordinates = ...
let marker = NMAMapMarker(geoCoordinates: coordinates)
let image: UIImage = ...
marker.icon = NMAImage(uiImage: image)
Hopefully, it helps.
Related
I'm using the following code to see when markers enter the screen :
let visibleRegion = mapView.projection.visibleRegion()
let bounds = GMSCoordinateBounds(region: visibleRegion)
for i in stride(from: 0, to: markers.count, by: 1){
let marker = markers[i]
if bounds.contains(marker.position) {
print("Is present on screen")
print(marker.position)
} else {
// Marker not on the screen
}
}
This works and when I scroll the map on top of a marker I get the printout.
I've got 30k markers that I'm needing to potentially place onto the map. The markers show up at different zoom levels, and only need to be loaded once the user is able to see them.
The marker is a rounded image view, so as you an imagine loading 30 thousand pictures into a map is a huge task.
I have JSON that I am loading in the Lon/Lat/ImageURL.
Do I need to deinit markers as they leave the screen and init them as they come onto the screen? Are google map annotations reused like a tableview cell? Should I only create the marker once a location from my JSON is in the bounds of the map, or can I create them and only add them to the map once they're in the bounds? What sort of optimization tools should I use?
Thanks for any tips here
I am able to set limited area to show at google map for user. After setting below code google map is not moving outside of this area defined with below code in Android: -
final LatLngBounds ADELAIDE = new LatLngBounds(
new LatLng(25.27, 93.46), new LatLng(27.05, 95.19));
// Constrain the camera target to the Adelaide bounds.
mMap.setMinZoomPreference(6.0f);
mMap.setLatLngBoundsForCameraTarget(ADELAIDE);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(26.05839, 94.45399), 6.0f));
Now I am trying to implement same feature to restrict user for google map area in Swift but there is no method like setLatLngBoundsForCameraTarget.
I have tried below code: -
let southWest = CLLocationCoordinate2DMake(25.27,93.46)
let northEast = CLLocationCoordinate2DMake(27.05,95.19)
let bounds = GMSCoordinateBounds(coordinate: northEast, coordinate: southWest)
let cameraBounds = googleMapView.camera(for: bounds, insets: UIEdgeInsets.zero)
googleMapView.camera = cameraBounds!
but this is not working. User still can move outside of this bounds.
Please help. Thanks in advance.
I am trying to create a UITableViewCell containing a GMSMapView with a GMSMarker at the center of the current Position.
The problem is that the marker always appears at the top left corner of the current position and I don't know how to solve the problem.
I tried to follow these steps: Implementing a Google Map with UItableviewCell
here is my code from cellForRowAt:
let locationCell = tableView.dequeueReusableCell(withIdentifier: "activityLocationCell") as! ActivityLocationCell
let latitude = CLLocationDegrees(activity.coordinates![0])
let longitude = CLLocationDegrees(activity.coordinates![1])
let position = CLLocationCoordinate2D(latitude: latitude, longitude: longitude)
locationCell.googleMapView.camera = GMSCameraPosition.camera(withTarget: position, zoom: 15)
let marker = GMSMarker(position: position)
marker.groundAnchor = CGPoint(x: 0.5, y: 0.5)
marker.map = locationCell.googleMapView
return locationCell
Here is a screenshot of my problem:
marker is at the top left corner of the map
I had a pretty similar issue. I resolved it by changing the moment I configure the map in the view lifecycle.
In my case, I was using a child view controller. I was configuring the map before viewWillAppear was called which caused the map to not center properly (the marker was on the top left corner). I moved my call to after the viewWillAppear and it fixed it. A good place would be viewDidAppear.
If you are using a cell, you will probably need to investigate with the view lifecycle instead of the controller lifecycle.
This is not written anywhere on the Google documentation.
you have to draw map in
func viewDidLayoutSubviews()
Try creating Marker when map is ready completely. for eg: use the delegate.
var ifMapReady: Bool = false
...
...
func mapViewSnapshotReady(_ mapView: GMSMapView) {
ifMapReady = true
}
//Call this method from where ever you want to load map
func updateMap() {
if ifMapReady {
//Load Map
}
}
This delegate will be called multiple times(eg: map is swiped or moved etc) whenever the Map tiles are ready. So we can use a boolean value for understanding that map loaded successfully. Based on that value we can load the Map properly when initiating.
I want to add one more thing. #Gabriel Cartier's answer worked for me with one additional change in my code.
[self->mapView_ animateToCameraPosition:camera];
And I replaced with
[self->mapView_ setCamera:camera];
Is there an official way to set a custom user location dot in Google maps for iOS (GMSMapView)?
Is there a known way to "hack" it? Like iterating through all subviews and layers and fish the blue dot?
Even if you can't customise its appearance, can you control its z order index? When you have many markers, the little blue dot becomes hidden, and sometimes you want it to be visible at all times.
Thanks
You can try to find the image on:
GoogleMaps.framework > Resources > GoogleMaps.bundle
OR
GoogleMaps.framework > Resources > GoogleMaps.bundle > GMSCoreResources.bundle
I did a quick search on those and the only associated file I found with that blue dot is GMSSprites-0-1x.
Please read the google maps terms and conditions because this might not be legal.
You can set the maps myLocationEnabled to NO. That will hide the default location dot. Then use an instance of CLLocationManager to give you your position. Inside CLLocationManager didUpdateLocations method you can set a custom GMSMarker. Set its icon property to whatever you want your dot to look like using [UIImage imageNamed:]. This will allow you to achieve the desired effect.
Swift 4
Disable the default Google Map current location marker (it's disabled by default):
mapView.isMyLocationEnabled = false
Create a marker as an instance property of the view controller (because a delegate will need access to this):
let currentLocationMarker = GMSMarker()
The GMSMarker initializer allows for a UIImage or a UIView as a custom graphic, not a UIImageView unfortunately. If you want more control over the graphic, use a UIView. In your loadView or viewDidLoad (wherever you configured the map), configure the marker and add it to the map:
// configure custom view
let currentLocationMarkerView = UIView()
currentLocationMarkerView.frame.size = CGSize(width: 40, height: 40)
currentLocationMarkerView.layer.cornerRadius = 40 / 4
currentLocationMarkerView.clipsToBounds = true
let currentLocationMarkerImageView = UIImageView(frame: currentLocationMarkerView.bounds)
currentLocationMarkerImageView.contentMode = .scaleAspectFill
currentLocationMarkerImageView.image = UIImage(named: "masterAvatar")
currentLocationMarkerView.addSubview(currentLocationMarkerImageView)
// add custom view to marker
currentLocationMarker.iconView = currentLocationMarkerView
// add marker to map
currentLocationMarker.map = mapView
All that remains is giving the marker a coordinate (initially and every time the user's location changes), which you do through the CLLocationManagerDelegate delegate.
extension MapViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let lastLocation = locations.last!
// update current location marker
currentLocationMarker.position = CLLocationCoordinate2D(latitude: lastLocation.coordinate.latitude, longitude: lastLocation.coordinate.longitude)
}
}
The first few locations that the location manager produces may not be very accurate (although sometimes it is), so expect your custom marker to jump around a bit at first. You can wait until the location manager has gathered a few coordinates before applying it to your custom marker by waiting until locations.count > someNumber but I don't find this approach very attractive.
I am trying to use the MapKit-Framework in iOS. I have a map, where I draw a polyline.
Now I want to add some simple annotations. I add them to the map, but they are not shown directly. I have to move the camera. After I move the camera or use the zoom, the annotations are visible.
What I have to call to refresh the map to show the annotations directly?
var zugEndeAnnotation : MKPointAnnotation = MKPointAnnotation();
zugEndeAnnotation.coordinate = CLLocationCoordinate2D(latitude: zugEnde.coordinate.latitude , longitude: zugEnde.coordinate.longitude);
self.map.addAnnotation(zugEndeAnnotation);
best regards