Drop Pin in MapView using Custom Addresses - ios

Question

I created a map view in my app. Now I want the user to be able to add several addresses to drop pins at those locations. I also want the user to be able to remove these pins.
Does anyone know where I can find a good tutorial, or where to start? I have no experience with mapviews...

Answer 1

try this......
-
(void)ShowPins
{
activity.hidden=YES;
[activity stopAnimating];
double lat;
double lng;
for (int ijk=0; ijk<arrayLocationList.count; ijk++)
{
/*Set your lat and long here*/
lat=[[[[arrayLocationList objectAtIndex:ijk]objectForKey:#"location"] objectForKey:#"lat"] doubleValue];
lng=[[[[arrayLocationList objectAtIndex:ijk]objectForKey:#"location"] objectForKey:#"lng"] doubleValue];
CLLocationCoordinate2D geos = CLLocationCoordinate2DMake(lat, lng);
MKPlacemark* marker = [[MKPlacemark alloc] initWithCoordinate:geos addressDictionary:nil];
[mapVieww addAnnotation:marker];
}
CLLocationCoordinate2D coord1 = {.latitude = lat, .longitude =lng};
MKCoordinateSpan span = {.latitudeDelta = .03,.longitudeDelta = .03};
MKCoordinateRegion region = {coord1, span};
[mapVieww setRegion:region];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation;
{
MKPinAnnotationView *newAnnotation = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"annotation1"];
UILabel *lable=[[UILabel alloc]init];
[newAnnotation addSubview:lable];
newAnnotation.pinColor = MKPinAnnotationColorRed;
newAnnotation.animatesDrop = YES;
newAnnotation.canShowCallout = NO;
[newAnnotation setSelected:YES animated:YES];
return newAnnotation;
}

Answer 2

To Drop pins at several locations u have to try this code:
You need to put all those location latitude and longitude in an array and call this function everytime after incrementing the num value
-(void)Mapview
{ NSMutableArray* annotations=[[NSMutableArray alloc] init];
CLLocationCoordinate2D theCoordinate1;
theCoordinate1.latitude = [latit[num]doubleValue];
theCoordinate1.longitude = [longit[num]doubleValue];
Annotation* myAnnotation1=[[Annotation alloc] init];
myAnnotation1.coordinate=theCoordinate1;
[map_view addAnnotation:myAnnotation1];
map_view.showsUserLocation = NO;
[annotations addObject:myAnnotation1];
MKMapRect rect = MKMapRectNull;
for (id <MKAnnotation> annotation in annotations) {
MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 20);
if (MKMapRectIsNull(rect)) {
rect = pointRect;
} else {
rect = MKMapRectUnion(rect, pointRect);
}
}
map_view.visibleMapRect = rect;
}
You can edit this code by adding leftcallout acessoryview or modify the contents in callout view .
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
map_view.showsUserLocation= NO;
// if it's the user location, just return nil.
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
MKPinAnnotationView* pinView = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:#"AnnotationIdentifier"];
if(pinView == nil)
{
pinView = pinView=[[MKPinAnnotationView alloc]
initWithAnnotation:annotation
reuseIdentifier:#"currentloc"] ;
pinView.centerOffset = CGPointMake(0,60);
pinView.animatesDrop=YES;
pinView.canShowCallout=YES;
}
return pinView;
}
To Remove the pins you can use this code
[self.map_view removeAnnotations:map_view.annotations];
(or)
[self.map_view removeAnnotations: [self.map_view.annotations filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"!(self isKindOfClass: %#)", [MKUserLocation class]]]];