how to detect scroll or zoom on mapkit with touch

Question

I create one mapkit app that in this show my location and update this location every time and set this location in center of view. I update my location and set in center with Boolean variable. I want detect scroll or zoom touch finger on my map and when I do it my boolean variable changed and don't set my location on center but I don't know about handling touch event on mapkit.

please guide me about that and tell me how to change my variable when touching and scroll map. thanks. this is my code:

@implementation ViewController
{
    CLLocationManager *locationManager;
    double latitudes;
    double longitudes;
    BOOL updateLocation;
}
@synthesize mapView;
- (void)viewDidLoad
{
    [super viewDidLoad];
    locationManager = [[CLLocationManager alloc] init];
    updateLocation = YES;
    mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    mapView.mapType = MKMapTypeStandard;
    mapView.zoomEnabled = YES;
    mapView.scrollEnabled = YES;
    mapView.showsUserLocation = YES;
    [mapView.userLocation setTitle:@"I'm Here"];
    [self.view addSubview:mapView];
    mapView.delegate = self;

    [self GetMyLocation];


}
#pragma mark - CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{
            NSLog(@"didFailWithError: %@", error);
            UIAlertView *errorAlert = [[UIAlertView alloc]
                                       initWithTitle:@"Error" message:@"Failed to Get Your Location" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [errorAlert show];
        }
        - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
            CLLocation *currentLocation = newLocation;

            if (currentLocation != nil) {
                longitudes = currentLocation.coordinate.longitude;
                latitudes = currentLocation.coordinate.latitude;
                //NSLog(@"%f,%f",longitudes,latitudes);
                //[self centerLocation];
            }
        }



#pragma mark - MKMapViewDelegate
            - (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
                if (updateLocation) {
                    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 800, 800);
                    [self.mapView setRegion:[self.mapView regionThatFits:region] animated:NO];
                }
                else{NSLog(@"Don't Update");}
            }

score 5 · Accepted Answer · answered May 19 '14 at 07:49

Use:

mapView:regionWillChangeAnimated:

which tells the delegate that the region displayed by the map view is about to change.

This method is called whenever the currently displayed map region changes. During scrolling, this method may be called many times to report updates to the map position. Therefore, your implementation of this method should be as lightweight as possible to avoid affecting scrolling performance.

Based on MKMapViewDelegate Protocol Reference

thanks dude. what's different between – mapView:regionWillChangeAnimated: – mapView:regionDidChangeAnimated: — user3599133, May 19 '14 at 08:18

score 5 · Answer 2 · answered May 19 '14 at 07:50

5

Simply use MKMapView delegate methods bellow

– mapView:regionWillChangeAnimated:
– mapView:regionDidChangeAnimated:

answered May 19 '14 at 07:50

Pancho

4,099
1
21
32

score 0 · Answer 3 · answered Apr 10 '18 at 09:37

0

In Swift just you should use from following code

extension UIViewController: MKMapViewDelegate {
     func mapView(_ mapView: MKMapView, regionDidChangeAnimated animated: Bool) {}
}

answered Apr 10 '18 at 09:37

Saeed

412
5
16

how to detect scroll or zoom on mapkit with touch

3 Answers3