StackOverflow2013

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copied!<p>You don't need locations @property and - addAnnotation: method. One MKAnnotation object represents a location.</p> <p>My suggestion is to modify Annotation class accordingly, as well as conforming and create it's objects as many as number of locations you would like to annotate.</p> <p>Remove locations @property and -addAnnotation: method from Annotation.h/m</p> <p><strong>Annotation.h</strong></p> <pre><code>#import <Foundation/Foundation.h> #import <MapKit/MKAnnotation.h> @interface Annotation : NSObject <MKAnnotation> { CLLocationCoordinate2D coordinate; NSString *title; NSString *subtitle; } @property (nonatomic, assign) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString *title; @property (nonatomic, copy) NSString *subtitle; -(id) initWithTitle: (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; -(id) initWithTitle: (NSString *)initTitle : (NSString *)initSubtitle : (CLLocationCoordinate2D) initCoordinate { self = [super init]; if ( self ) { self.coordinate = initCoordinate; self.title = [NSString stringWithFormat:@"%@", initTitle]; self.subtitle = [NSString stringWithFormat:@"%@", initSubtitle]; } return self; // correction appreciated. } @end </code></pre> <p><strong>Some methods changed in your view controller</strong></p> <pre><code>-(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; NSArray *annotations = @[ [[Annotation alloc] initWithTitle:@"America has a new President !" :@"Washington DC" :l1], [[Annotation alloc] initWithTitle:@"Revolutionary app by Belgium student" :@"Antwerp" :l2], [[Annotation alloc] initWithTitle:@"The new Arabic revolution" :@"Egypt, Tahir square" :l3], [[Annotation alloc] initWithTitle:@"World Championchip football" :@"Rio de Janeiro" :l4] ]; // Adding 4 annotation objects [self.mapView addAnnotations:annotations]; } -(void) createAnnotations { [self initSomeExamples]; // Annotations are added in -initSomeExamples method. } </code></pre>

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