7.4 Displaying Pins on a Map View

MyAnnotation.h 文件

#import <Foundation/Foundation.h>

#import <MapKit/MapKit.h>

@interface MyAnnotation : NSObject <MKAnnotation>

@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;

@property (nonatomic, copy, readonly) NSString *title;

@property (nonatomic, copy, readonly) NSString *subtitle;

- (id) initWithCoordinates:(CLLocationCoordinate2D)paramCoordinates

                     title:(NSString *)paramTitle

                  subTitle:(NSString *)paramSubTitle;

@end

MyAnnotation.m 文件

#import "MyAnnotation.h"

@implementation MyAnnotation

- (id) initWithCoordinates:(CLLocationCoordinate2D)paramCoordinates

                     title:(NSString *)paramTitle

                  subTitle:(NSString *)paramSubTitle{

    self = [super init];

    if (self != nil){

        _coordinate = paramCoordinates;

        _title = paramTitle;

        _subtitle = paramSubTitle;

    }

    return(self);

}

@end

ViewController.h 文件

#import <UIKit/UIKit.h>

@protocol MKMapViewDelegate;

@interface ViewController : UIViewController<MKMapViewDelegate>

@end

ViewController.m文件

#import <MapKit/MapKit.h>

#import "ViewController.h"

#import "MyAnnotation.h"

@interface ViewController ()

@property (nonatomic, retain) MKMapView * myMapView;

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    

    /* Create a map as big as our view */

    self.myMapView = [[MKMapView alloc] initWithFrame:self.view.bounds];

    self.myMapView.delegate = self;

    /* Set the map type to Standard */

    self.myMapView.mapType = MKMapTypeStandard;

    self.myMapView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

    /* Add it to our view */

    [self.view addSubview:self.myMapView];

    /* This is just a sample location */

    CLLocationCoordinate2D location = CLLocationCoordinate2DMake(24.5, 118.13);//厦门

    /* Create the annotation using the location */

    MyAnnotation *annotation =

    [[MyAnnotation alloc] initWithCoordinates:location

                                        title:@"My Title"

                                     subTitle:@"My Sub Title"];

    /* And eventually add it to the map */

    [self.myMapView addAnnotation:annotation];

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end

输出：

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