Making the map zoom to user location and annotation (swift 2)

Question

I am working with mapkit. I want the map to zoom to show the user\'s location and the annotated point, instead of just zooming to the user\'s current location.

Curre

Answer 1

It just jumps right back to the user's location, because didUpdateLocations method is called many times. There are two solutions.

1) Use requestLocation

If you use requestLocation method instead of startUpdatingLocation, didUpdateLocations method is called only once

if #available(iOS 9.0, *) {
    locationManager.requestLocation()
} else {
    // Fallback on earlier versions
}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let userLoction: CLLocation = locations[0]
    let latitude = userLoction.coordinate.latitude
    let longitude = userLoction.coordinate.longitude
    let latDelta: CLLocationDegrees = 0.05
    let lonDelta: CLLocationDegrees = 0.05
    let span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, lonDelta)
    let location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
    let region: MKCoordinateRegion = MKCoordinateRegionMake(location, span)
    self.map.setRegion(region, animated: true)
    self.map.showsUserLocation = true
}

2) Use flag

var isInitialized = false

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if !isInitialized {
        // Here is called only once
        isInitialized = true

        let userLoction: CLLocation = locations[0]
        let latitude = userLoction.coordinate.latitude
        let longitude = userLoction.coordinate.longitude
        let latDelta: CLLocationDegrees = 0.05
        let lonDelta: CLLocationDegrees = 0.05
        let span:MKCoordinateSpan = MKCoordinateSpanMake(latDelta, lonDelta)
        let location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude, longitude)
        let region: MKCoordinateRegion = MKCoordinateRegionMake(location, span)
        self.map.setRegion(region, animated: true)
        self.map.showsUserLocation = true
    }
}