chenr2
commented
8 years ago Hi Deepak,
Obtaining the user's location is not within the scope of FBAnnotationClusteringSwift. However, it just so happens that I'm in the middle of writing a MapKit related blog post at www.thorntech.com which includes a section on getting the user location. So I can give you a quick and dirty list of instructions right here:
- Within
Info.plist, setNSLocationWhenInUseUsageDescriptionas aStringto show the body copy the user will see in the permissions alert dialog. Without this, the user will never see the permissions alert. - Within
ViewController.swift(orFBViewController.swiftin this repo), add the following code. This fires the permissions dialog (which you'll need on first launch) and the location request (which you'll need for subsequent launches).
import UIKit
import MapKit
class ViewController : UIViewController {
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters
locationManager.requestWhenInUseAuthorization()
locationManager.requestLocation()
}
}Note: requestLocation() is available in iOS 9. If you need to support iOS 8, there's a method startUpdatingLocation() which is a little less elegant to use because you have to stop polling for location when location accuracy improvements start leveling off (otherwise, you'll drain the user's battery). Ray Wenderlich's iOS Apprentice (Part 3) has a very thorough user location section that covers startUpdatingLocation().
- Append the following to
ViewController.swift(outside of theclassbody). This retries the location request if the user chose toAllowlocation permissions. It also zooms in once it gets the user's location.
extension ViewController : CLLocationManagerDelegate {
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
if status == .AuthorizedWhenInUse {
locationManager.requestLocation()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
if let location = locations.first {
let region = MKCoordinateRegion(center: location.coordinate, span: span)
mapView.setRegion(region, animated: true)
}
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
print("Error finding location: \(error.localizedDescription)")
}
}- In the
Storyboard, check theUser Locationbox in theAttributes Inspectoron theMap Kit View. This shows the blue pulsy dot. - In
ViewController.swift, add this to the beginning ofmapView(_:viewForAnnotation:). This makes sure the blue pulsy dot isn't affected by the pins/clusters.
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView?{
if annotation is MKUserLocation {
//return nil so map view draws "blue dot" for standard user location
return nil
}
// other code...
}- In
ViewController.swift, make sure there's nothing else that would reposition the map. So comment this line out:
//mapView.centerCoordinate = CLLocationCoordinate2DMake(0, 0);Hope this helps. Rob
Deepak050392
hi I am using this for clustering the locations, it works great, But i want to set the set location on loading the map. But it tends to full zoom out cluster view. i want how to set the initial location to current location and then i want to show the cluster only on zoom out and the zoom in.