MKMapview place pin at location (long/lat) - objective-c

Question

I have latitude and long values and I need to be able to drop a pin at this location.
Can anybody provide some advice on how to go about this?

Answer 1

Find the below very simple solution to drop the pin at given location define by CLLocationCoordinate2D
Drop Pin on MKMapView
Edited:
CLLocationCoordinate2D ctrpoint;
ctrpoint.latitude = 53.58448;
ctrpoint.longitude =-8.93772;
AddressAnnotation *addAnnotation = [[AddressAnnotation alloc] initWithCoordinate:ctrpoint];
[mapview addAnnotation:addAnnotation];
[addAnnotation release];

Answer 2

You should:
1. add the MapKit framework to your project.
2. create a class which implements the MKAnnotation protocol.
Sample:
Annotation.h
#interface Annotation : NSObject <MKAnnotation> {
NSString *_title;
NSString *_subtitle;
CLLocationCoordinate2D _coordinate;
}
// Getters and setters
- (void)setTitle:(NSString *)title;
- (void)setSubtitle:(NSString *)subtitle;
#end
Annotation.m
#implementation Annotation
#pragma mark -
#pragma mark Memory management
- (void)dealloc {
[self setTitle:nil];
[self setSubtitle:nil];
[super dealloc];
}
#pragma mark -
#pragma mark Getters and setters
- (NSString *)title {
return _title;
}
- (NSString *)subtitle {
return _subtitle;
}
- (void)setTitle:(NSString *)title {
if (_title != title) {
[_title release];
_title = [title retain];
}
}
- (void)setSubtitle:(NSString *)subtitle {
if (_subtitle != subtitle) {
[_subtitle release];
_subtitle = [subtitle retain];
}
}
- (CLLocationCoordinate2D)coordinate {
return _coordinate;
}
- (void)setCoordinate:(CLLocationCoordinate2D)newCoordinate {
_coordinate = newCoordinate;
}
#end
2. create an instance of this class and set the lat/lon property
3. add the instance to the MKMapView object with this method:
- (void)addAnnotation:(id<MKAnnotation>)annotation
4. You should set the delegate of the map and implement the following method:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
if ([annotation isKindOfClass:[MKUserLocation class]]) {
return nil;
}
static NSString* ShopAnnotationIdentifier = #"shopAnnotationIdentifier";
MKPinAnnotationView *pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:ShopAnnotationIdentifier];
if (!pinView) {
pinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:ShopAnnotationIdentifier] autorelease];
pinView.pinColor = MKPinAnnotationColorRed;
pinView.animatesDrop = YES;
}
return pinView;
}

Answer 3

This assumes that you have ARC enabled and that you have included the MapKit framework.
First create a class that implements the MKAnnotation protocol. We'll call it MapPinAnnotation.
MapPinAnnotation.h
#interface MapPinAnnotation : NSObject <MKAnnotation>
#property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
#property (nonatomic, readonly) NSString* title;
#property (nonatomic, readonly) NSString* subtitle;
- (id)initWithCoordinates:(CLLocationCoordinate2D)location
placeName:(NSString *)placeName
description:(NSString *)description;
#end
MapPinAnnotation.m
#implementation MapPinAnnotation
#synthesize coordinate;
#synthesize title;
#synthesize subtitle;
- (id)initWithCoordinates:(CLLocationCoordinate2D)location
placeName:(NSString *)placeName
description:(NSString *)description;
{
self = [super init];
if (self)
{
coordinate = location;
title = placeName;
subtitle = description;
}
return self;
}
#end
Then add the annotation to the map using the following:
CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(34.421496,
-119.70182);
MapPinAnnotation* pinAnnotation =
[[MapPinAnnotation alloc] initWithCoordinates:coordinate
placeName:nil
description:nil];
[mMapView addAnnotation:pinAnnotation];
The containing class will have to implement the MKMapViewDelegate protocol. In particular you will have to define the following function to draw the pin:
- (MKAnnotationView *)mapView:(MKMapView *)mapView
viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]])
{
return nil;
}
static NSString* myIdentifier = #"myIndentifier";
MKPinAnnotationView* pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:myIdentifier];
if (!pinView)
{
pinView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:myIdentifier];
pinView.pinColor = MKPinAnnotationColorRed;
pinView.animatesDrop = NO;
}
return pinView;
}
In this example the MKAnnotation title and subtitle member variables are not used, but they can be displayed in the delegate function.

Answer 4

-(MKPointAnnotation *)showClusterPoint:(CLLocationCoordinate2D)coords withPos:(NSString *)place
{
float zoomLevel = 0.5;
region = MKCoordinateRegionMake (coords, MKCoordinateSpanMake (zoomLevel, zoomLevel));
[mapView setRegion: [mapView regionThatFits: region] animated: YES];
point = [[MKPointAnnotation alloc]init];
point.coordinate = coords;
point.title=place;
[mapView addAnnotation:point];
return point;
}

Answer 5

Swift Version
let location = CLLocationCoordinate2DMake(13.724362, 100.515342);
let region = MKCoordinateRegionMakeWithDistance(location, 500.0, 700.0)
self.mkMapView.setRegion(region, animated: true)
// Drop a pin
let dropPin = MKPointAnnotation();
dropPin.coordinate = location;
dropPin.title = "Le Normandie Restaurant";
self.mkMapView.addAnnotation(dropPin);

Answer 6

Please use this code. its working fine.
-(void)addAllPinsOnMapView
{
MKCoordinateRegion region = mapViewOffer.region;
region.center = CLLocationCoordinate2DMake(23.0225, 72.5714);
region.span.longitudeDelta= 0.1f;
region.span.latitudeDelta= 0.1f;
[mapViewOffer setRegion:region animated:YES];
mapViewOffer.delegate=self;
MKPointAnnotation *mapPin = [[MKPointAnnotation alloc] init];
CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(23.0225, 72.5714);
mapPin.title = #"Title";
mapPin.coordinate = coordinate;
[mapViewOffer addAnnotation:mapPin];
}
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:
(MKAnnotationView *)view
{
NSLog(#"%#",view.annotation.title);
NSLog(#"%f",view.annotation.coordinate.latitude);
NSLog(#"%f",view.annotation.coordinate.longitude);
}
- (MKAnnotationView *)mapView:(MKMapView *)theMapView
viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]])
{
((MKUserLocation *)annotation).title = #"Current Location";
return nil;
}
else
{
MKAnnotationView *pinView = nil;
static NSString *defaultPinID = #"annotationViewID";
pinView = (MKAnnotationView *)[mapViewOffer dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
if ( pinView == nil ){
pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID];
}
pinView.canShowCallout = YES;
pinView.image = [UIImage imageNamed:#"placeholder"];
UIButton *infoButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
// [infoButton addTarget:self action:#selector(infoButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
pinView.rightCalloutAccessoryView = infoButton;
pinView.rightCalloutAccessoryView.tag=1;
return pinView;
}
}
- (MKPinAnnotationView*)myMap:(MKMapView*)myMap viewForAnnotation:
(id<MKAnnotation>)annotation{
MKPinAnnotationView *pin = [[MKPinAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:#"CustomPin"];
UIImage *icon = [UIImage imageNamed:#"bustour.png"];
UIImageView *iconView = [[UIImageView alloc] initWithFrame:CGRectMake(8,0,32,37)];
if(icon == nil)
NSLog(#"image: ");
else
NSLog(#"image: %#", (NSString*)icon.description);
[iconView setImage:icon];
[pin addSubview:iconView];
pin.canShowCallout = YES;
pin.pinColor = MKPinAnnotationColorPurple;
return pin;
}
- (IBAction)btnLocateMe:(UIButton *)sender
{
[mapViewOffer setCenterCoordinate:mapViewOffer.userLocation.location.coordinate animated:YES];
}