How to remove just added, one annotation?

Question

I have a lot of annotations on the mapView and user location dot. Then, if user tap for 2 sec. on the map, I add an extra annotation with options. I need to remove that last added annotation from map by pressing the button. How can I remove it without to remove any other annotation?

- (void)addPin:(UILongPressGestureRecognizer*)recognizer { 
    if(UIGestureRecognizerStateBegan == recognizer.state) {


        CGPoint tappedPoint = [recognizer locationInView:mapView];

        CLLocationCoordinate2D locCoord= [mapView convertPoint:tappedPoint toCoordinateFromView:mapView];


        MKPointAnnotation *annot = [[MKPointAnnotation alloc] init];
        annot.coordinate = locCoord;
        [self.mapView addAnnotation:annot];

    }

    if(UIGestureRecognizerStateChanged == recognizer.state) {
        // Do repeated work here (repeats continuously) while finger is down
    }

    if(UIGestureRecognizerStateEnded == recognizer.state) {
        // Do end work here when finger is lifted
    }
}

See http://stackoverflow.com/questions/17892362/how-to-delete-the-last-annotation-on-a-mapview — , Sep 05 '13 at 13:56

score 4 · Answer 1 · answered Jun 05 '14 at 15:39

4

To remove all the annotations from map view:

[vwMap removeAnnotations:vwMap.annotations];

PS: vwMap is the MKMap view object

answered Jun 05 '14 at 15:39

pkc456

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Downvote for not answering the question. He only wants to remove one annotation. This would remove them all. – Christopher Wade Cantley Apr 23 '15 at 17:44

score 2 · Answer 2 · answered Jun 06 '12 at 08:30

2

Do the following,

If you have the annotation object

[self.mapView removeAnnotation:annot];

If you have the index of the object

[self.mapView removeAnnotation:self.mapView.annotations.lastObject];

answered Jun 06 '12 at 08:30

Omar Abdelhafith

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If I use [self.mapView removeAnnotation:self.mapView.annotations.lastObject]; it removes user location – Pavel Kaljunen Jun 06 '12 at 08:45
[self.mapView removeAnnotation:annot]; That work if I did that in same method, but how can I put it into button action? – Pavel Kaljunen Jun 06 '12 at 09:48
create an ibaction for a button and then set the code inside it, are you facing problems with that? – Omar Abdelhafith Jun 06 '12 at 11:49
No, remove lastObject doesn't remove just added pin – Pavel Kaljunen Jun 06 '12 at 13:18

score 0 · Answer 3 · answered Jun 06 '12 at 08:41

0

Do this to remove your last added annotation in your delete Action:

[self.mapView removeAnnotation:[self.mapView.annotations lastObject]];

Hope helpful

answered Jun 06 '12 at 08:41

Paresh Navadiya

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by this it removes user location. Even if I add then another pin, it doesn't remove it. – Pavel Kaljunen Jun 06 '12 at 08:54
Check for user location if count is 1 then u dont want to delete it eitherwise another annotation will be deleted if(![self.mapView.annotations count] == 1) { [self.mapView removeAnnotation:[self.mapView.annotations lastObject]];} – Paresh Navadiya Jun 06 '12 at 09:09
Now it doesn't remove anything – Pavel Kaljunen Jun 06 '12 at 09:21
One annotation is for user location which will not be removed and other annotion just you added will be removed if u add the code i given in comment. Is this what u want? – Paresh Navadiya Jun 06 '12 at 09:44
I tried your code and it doesn't work for me. It doesn't remove just added annotation for some reason( – Pavel Kaljunen Jun 06 '12 at 09:46
first annotation will not be removed but other than that will be removed as your requirement – Paresh Navadiya Jun 06 '12 at 09:50
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/12191/discussion-between-safecase-and-pavel-kaljunen) – Paresh Navadiya Jun 06 '12 at 09:53

score 0 · Answer 4 · answered Mar 07 '15 at 01:12

I managed to remove the annotation object that is touched by doing the following, I know this wasn't the question but it may help someone out

set the mapView as delegate

- (void)mapView:(MKMapView *)thisMapView didSelectAnnotationView:(MKAnnotationView *)view {

MKPointAnnotation *thisTouchedAnnotation = view.annotation;

uint8_t annotationCount = thisMapView.annotations.count;

for(int i =0; i<annotationCount; i++)
{
    if ([thisMapView.annotations objectAtIndex:i]==thisTouchedAnnotation){
        [thisMapView removeAnnotation:[mapView.annotations objectAtIndex:i]];
        break;
    }

   }
}

not flawless code but it may guide you :-)

score 0 · Answer 5 · answered Feb 03 '16 at 10:36

0

Use this code!

NSArray *array=self.mapview.annotations;
for (MKPointAnnotation *anno in array)
{
    if(anno==[array lastObject])
    {
        [self.mapview removeAnnotation:anno];
    }
}

answered Feb 03 '16 at 10:36

bharathi kumar

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How to remove just added, one annotation?

5 Answers5