MKMapView: Issue with changing pin image - ios

Question

I am trying to change the standard pin to my own image but I keep failing after several attempts.
I have tried different codes and guides that I have found here in this forum but none of them seems to work. I belive I am pasting the code in to my project wrongly. Any ideas how to replace the regular pin with my own image?
//.h
#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>
#interface MapPin : NSObject <MKAnnotation> {
CLLocationCoordinate2D coordinate;
NSString *title;
NSString *subtitle;
}
#property (nonatomic, assign) CLLocationCoordinate2D coordinate;
#property (nonatomic, copy) NSString *title;
#property (nonatomic, copy) NSString *subtitle;
- (id)initWithLocation:(CLLocationCoordinate2D)coord;
#end
//.m
#import <Foundation/Foundation.h>
#import "MapPin.h"
#implementation MapPin
#synthesize coordinate,title,subtitle;
- (id)initWithLocation:(CLLocationCoordinate2D)coord{
self = [super init];
if (self) {
coordinate = coord;
}
return self;
}
#end
//Viewcontroller.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface FirstViewController : UIViewController <UIAlertViewDelegate, UIWebViewDelegate> {
MKMapView *mapview;
}
- (IBAction)information;
#property (strong, nonatomic) IBOutlet UIScrollView *ScrollView;
#property (strong, nonatomic) IBOutlet UIImageView *image;
#property (retain, nonatomic) IBOutlet MKMapView *mapview;
- (IBAction)showMenu;
- (IBAction)setMap:(id)sender;
- (IBAction)GetLocation:(id)sender;
#end
//Viewcontroller.m
#import "FirstViewController.h"
#import "MapPin.h"
#implementation FirstViewController
#synthesize ScrollView, image;
#synthesize mapview;
- (void)viewDidLoad{
MKCoordinateRegion region = { {0.0, 0.0}, {0.0,0.0}};
region.center.latitude = 55.709900;
region.center.longitude = 13.201207;
region.span.longitudeDelta = 0.032f;
region.span.latitudeDelta = 0.032f;
[mapview setRegion:region animated:YES];
MapPin *ann = [[MapPin alloc] init];
ann.title = #"test Town";
ann.subtitle = #"test Nation";
ann.coordinate = region.center;
ann.coordinate = region.center;
[mapview addAnnotation:ann];
MKCoordinateRegion region2 = { {0.0, 0.0}, {0.0,0.0}};
region2.center.latitude = 55.703904;
region2.center.longitude = 13.201207;
region2.span.longitudeDelta = 0.032f;
region2.span.latitudeDelta = 0.032f;
[mapview setRegion:region2 animated:YES];
MapPin *ann2 = [[MapPin alloc] init];
ann2.title = #"test Town";
ann2.subtitle = #"test Nation";
ann2.coordinate = region2.center;
ann2.coordinate = region2.center;
[mapview addAnnotation:ann2];
ScrollView.scrollEnabled = YES;
[ScrollView setContentSize:CGSizeMake(320, 515)];
}
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
static NSString* AnnotationIdentifier = #"AnnotationIdentifier";
MKPinAnnotationView* pinView = [[MKPinAnnotationView alloc]
initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier];
pinView.animatesDrop=YES;
pinView.canShowCallout=YES;
pinView.pinColor= MKPinAnnotationColorGreen;
pinView.enabled = YES;
pinView.canShowCallout = YES;
pinView.image=[UIImage imageNamed:#"test.png"]; //here I am giving the image
return pinView;
}

Answer 1

See my other answer for working implementation.
Setting an IBOutlet delegate:
Since you're using an IBOutlet for your MKMapView you should control-drag from your MKMapView in your storyboard/xib file to the ViewController/"File's Owner" and select "delegate" from the popup.
Here a SO answer that covers creating custom pins: Custom pins
Also,
pinView.image=[UIImage imageNamed:#"test.png"];
should be
pinView.image=[UIImage imageNamed:#"test"];
Reference: Image from imageNamed:

Answer 2

The following worked for me:
Make sure MapKit.framework has been added to your project.
Make sure test.png is in your project (preferably in Images.xcassets)
Control-drag from your mapView in your storyboard to the ViewController and connect "delegate".
Then...
#import "MapPin.h"
#import <MapKit/MapKit.h>
#interface ViewController () <MKMapViewDelegate>
#property (weak, nonatomic) IBOutlet MKMapView *mapview;
#end
#implementation ViewController
- (void)viewDidLoad
{
MKCoordinateRegion region = { {0.0, 0.0}, {0.0,0.0}};
region.center.latitude = 55.709900;
region.center.longitude = 13.201207;
region.span.longitudeDelta = 0.032f;
region.span.latitudeDelta = 0.032f;
[self.mapview setRegion:region animated:YES];
MapPin *ann = [[MapPin alloc] init];
ann.title = #"test Town";
ann.subtitle = #"test Nation";
ann.coordinate = region.center;
ann.coordinate = region.center;
[self.mapview addAnnotation:ann];
MKCoordinateRegion region2 = { {0.0, 0.0}, {0.0,0.0}};
region2.center.latitude = 55.703904;
region2.center.longitude = 13.201207;
region2.span.longitudeDelta = 0.032f;
region2.span.latitudeDelta = 0.032f;
[self.mapview setRegion:region2 animated:YES];
MapPin *ann2 = [[MapPin alloc] init];
ann2.title = #"test Town";
ann2.subtitle = #"test Nation";
ann2.coordinate = region2.center;
ann2.coordinate = region2.center;
[self.mapview addAnnotation:ann2];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]]) {
return nil;
}
static NSString* AnnotationIdentifier = #"AnnotationIdentifier";
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if(annotationView) {
return annotationView;
} else {
MKAnnotationView *annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:AnnotationIdentifier];
annotationView.image = [UIImage imageNamed:#"test"];
return annotationView;
}
}
#end

Answer 3

So I have followed the guidelines above, added the line of code and step3. Control-drag from your mapView in your storyboard to the ViewController and connect "delegate". which I named "pin".
But my image wont appear...I'll paste the new code again..there must be something wrong in it.
//Viewcontroller.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#interface FirstViewController : UIViewController <UIAlertViewDelegate, UIWebViewDelegate, MKMapViewDelegate> {
MKMapView *mapview;
}
- (IBAction)information;
#property (strong, nonatomic) IBOutlet UIScrollView *ScrollView;
#property (strong, nonatomic) IBOutlet UIImageView *image;
#property (retain, nonatomic) IBOutlet MKMapView *mapview;
#property (strong, nonatomic) IBOutlet MKMapView *pin;
- (IBAction)showMenu;
- (IBAction)setMap:(id)sender;
- (IBAction)GetLocation:(id)sender;
#end
//Viewcontroller.m
#import "FirstViewController.h"
#import "MapPin.h"
#implementation FirstViewController
#synthesize ScrollView, image;
#synthesize mapview;
#synthesize pin;
- (void)viewDidLoad{
MKCoordinateRegion region = { {0.0, 0.0}, {0.0,0.0}};
region.center.latitude = 55.709900;
region.center.longitude = 13.201207;
region.span.longitudeDelta = 0.032f;
region.span.latitudeDelta = 0.032f;
[self.mapview setRegion:region animated:YES];
MapPin *ann = [[MapPin alloc] init];
ann.title = #"test Town";
ann.subtitle = #"test Nation";
ann.coordinate = region.center;
ann.coordinate = region.center;
[self.mapview addAnnotation:ann];
MKCoordinateRegion region2 = { {0.0, 0.0}, {0.0,0.0}};
region2.center.latitude = 55.703904;
region2.center.longitude = 13.201207;
region2.span.longitudeDelta = 0.032f;
region2.span.latitudeDelta = 0.032f;
[self.mapview setRegion:region2 animated:YES];
MapPin *ann2 = [[MapPin alloc] init];
ann2.title = #"test Town";
ann2.subtitle = #"test Nation";
ann2.coordinate = region2.center;
ann2.coordinate = region2.center;
[self.mapview addAnnotation:ann2];
ScrollView.scrollEnabled = YES;
[ScrollView setContentSize:CGSizeMake(320, 515)];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
if ([annotation isKindOfClass:[MKUserLocation class]]) {
return nil;
}
static NSString* AnnotationIdentifier = #"AnnotationIdentifier";
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];
if(annotationView) {
return annotationView;
} else {
MKAnnotationView *annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:AnnotationIdentifier];
annotationView.image = [UIImage imageNamed:#"test"];
return annotationView;
}
}
#end