MKMapView how to change the User Nearest location pin image? - ios

Question

I want to change user nearest location pin image in map view.
"In my Project i show the some of the shop locations in map view. The locations (lat,long) are get from the api. Here i changed the given location pin image. it works fine. but i need to change the user nearest location pin image in the map view. I already get the distance details from the user current location to given api locations in that which are the locations are below 5 miles that location pin images are need to change. "
Here is my Annotation Code:
// View for Annotation Delegate Code for changing the pin image.
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation: (id<MKAnnotation>)annotation
{
[self.annotationCustom_View removeFromSuperview];
[self.annotationCurrentLoc_View removeFromSuperview];
static NSString *identifier = #"myAnnotation";
CustomMapViewAnnotation * annotationView = (CustomMapViewAnnotation *)[self.locationsMap_View dequeueReusableAnnotationViewWithIdentifier:identifier];
if (!annotationView)
{
annotationView = [[CustomMapViewAnnotation alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
if([annotation isKindOfClass:[MKUserLocation class]])
{
annotationView.image = [UIImage imageNamed:#"LocationsYour-Current-Location-Icon"]; // User Current Location Image
}
else
{
dispatch_async(dispatch_get_main_queue(), ^{
for(int i=0;i<[locations_ArrayList count];i++)
{
MapViewLocationModel *objValue=[locations_ArrayList objectAtIndex:i];
float value = [objValue.kiosk_distance floatValue];
if(value < 5.0)
{
annotationView.image = [UIImage imageNamed:#"LocationsFridge-Location-Icon"]; // Change the pin image which are the below 5.0 miles distance from the user current locations
}
else
{
annotationView.image = [UIImage imageNamed:#"LocationsBlackDot"]; // given api locations pin images
}
}
});
}
}
annotationView.canShowCallout = NO;
return annotationView;
}
This is my code. any one can help me on this?

Answer 1

Try following:
In order to display the pins in certain map area, first you need to
get the all pins inside the 5 miles.
// 1. Set the map zoom area visible of 5 miles:
mapView.region = MKCoordinateRegionMakeWithDistance(
centerCoordinate,
1609.344f * miles (5 in your case),
1609.344f * miles (5 in your case)
);
// 2. Now get the Rect of this map area:
MKMapRect mRect = self.map.visibleMapRect;
// 3. Get the all pins inside this Rect:
NSSet *annotationSet = [myMapView annotationsInMapRect:mRect];
// print number of annotations
NSLog(#"Number of annotations in rect: %d", annotationSet.count);
// this will return an array from the NSSet
NSArray *annotationArray = [annotationSet allObjects];
// 4. Assign some parameter to this annotation, by taking some property in the annotation class.
// 5. Now in your MapView Delegate method viewForAnnotation check the parameter and do the need full with the respective pins.
Hope this will help you to achieve what you want.