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POAdding more annotations to UIMapView
 

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    <p>I want to add more annotations to my mapview. I'm working with a class <code>Annotation</code> where there is a method <code>addAnnotation</code>. This method is being called in my <code>UIViewController</code> when I want to add a new annotation.</p> <p>But for some reason, only the annotation I added last, is displayed.</p> <p><strong>Annotation.h</strong></p> <pre><code>#import &lt;Foundation/Foundation.h&gt; #import &lt;MapKit/MKAnnotation.h&gt; @interface Annotation : NSObject { CLLocationCoordinate2D cooridnate; NSString *title; NSString *subtitle; } @property (nonatomic, assign) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString *title; @property (nonatomic, copy) NSString *subtitle; @property (nonatomic, retain) NSMutableArray *locations; -(void)addAnnotation: (NSString *)initTitle : (NSString *)initSubtitle : (CLLocationCoordinate2D) initCoordinate; @end </code></pre> <p><strong>Annotation.m</strong></p> <pre><code>#import "Annotation.h" @implementation Annotation @synthesize coordinate, title, subtitle, locations; -(void)addAnnotation: (NSString *)initTitle : (NSString *)initSubtitle : (CLLocationCoordinate2D) initCoordinate { locations = [[NSMutableArray alloc] init]; self.coordinate = initCoordinate; self.title = [NSString stringWithFormat:@"%@", initTitle]; self.subtitle = [NSString stringWithFormat:@"%@", initSubtitle]; [locations addObject:self]; // add all my anotations with location to an array } @end </code></pre> <p><strong>Method in my UIViewController</strong></p> <pre><code>#import "MapViewController.h" @interface MapViewController () @end @implementation MapViewController @synthesize mapView; #pragma mark - ViewController methods - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. [self initMapView]; ann = [[Annotation alloc] init]; // making place in memory } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } #pragma mark - UIMapController methods - (void)mapViewDidFinishLoadingMap:(MKMapView *)mapView { [self createAnnotations]; } -(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id&lt;MKAnnotation&gt;)annotation { if ([annotation isKindOfClass:[MKUserLocation class]]) { //If annotation = user position ==&gt; DON'T CHANGE return nil; } MKPinAnnotationView *MyPin=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"]; MyPin.pinColor = MKPinAnnotationColorRed; UIButton *advertButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; [advertButton addTarget:self action:@selector(showInfo:) forControlEvents:UIControlEventTouchUpInside]; MyPin.rightCalloutAccessoryView = advertButton; MyPin.draggable = NO; MyPin.highlighted = NO; MyPin.animatesDrop= FALSE; MyPin.canShowCallout = YES; return MyPin; } #pragma mark - MY Methods -(void) initMapView { [mapView setMapType:MKMapTypeStandard]; // standaard maptype [mapView setScrollEnabled:YES]; [mapView setZoomEnabled:YES]; [mapView setDelegate:self]; // gegevens van de map terugsturen naar deze viewController en de gebruiker [mapView setShowsUserLocation:YES]; [self focusWorld]; } -(void) createAnnotations { [self initSomeExamples]; [self.mapView addAnnotations: ann.locations]; } -(void) focusWorld { MKCoordinateRegion worldRegion = MKCoordinateRegionForMapRect(MKMapRectWorld); // regio instellen op World mapView.region = worldRegion; // regio doorgeven naar onze mapView } -(void) initSomeExamples { // Washington l1.latitude = 38.892102; l1.longitude = -77.029953; // Antwerp l2.latitude = 51.219787; l2.longitude = 4.411011; // Egypt l3.latitude = 29.993002; l3.longitude = 31.157227; // Brazil l4.latitude = -22.900846; l4.longitude = -43.212662; [ann addAnnotation:@"America has a new President !" :@"Washington DC" :l1]; // call method to add an annotation with these parameters [ann addAnnotation:@"Revolutionary app by Belgium student" :@"Antwerp" :l2]; [ann addAnnotation:@"The new Arabic revolution" :@"Egypt, Tahir square" :l3]; [ann addAnnotation:@"World Championchip football" :@"Rio de Janeiro" :l4]; } #pragma mark - ACTIONS -(void)showInfo:(id)sender { NSLog(@"Show info"); } @end </code></pre>
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