iOS 地图（添加大头针）

首先在工程中导入MapKit.framework库文件

 #import <UIKit/UIKit.h>

 @interface AppDelegate : UIResponder <UIApplicationDelegate>

 @property (strong, nonatomic) UIWindow *window;

 @end

 #import "AppDelegate.h"
 #import "RootViewController.h"
 @interface AppDelegate ()

 @end

 @implementation AppDelegate

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
     // Override point for customization after application launch.
     self.window.backgroundColor = [UIColor whiteColor];

     self.window.rootViewController = [[RootViewController alloc] init];

     [self.window makeKeyAndVisible];
     return YES;
 }

 @end

 #import <UIKit/UIKit.h>

 @interface RootViewController : UIViewController

 @end

 #import "RootViewController.h"
 #import <MapKit/MapKit.h>
 #import "YXYCAnation.h"

 @interface RootViewController ()<MKMapViewDelegate>

 @end

 @implementation RootViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     // 初始化MKMapView
     MKMapView *mapView = [[MKMapView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
     // 设置代理
     mapView.delegate = self;
     // 设置显示当前位置
     mapView.showsUserLocation = YES;
     // 设置地图显示类型
     mapView.mapType = MKMapTypeStandard;
     // 经纬度
     CLLocationCoordinate2D coord2D = {23.117000,113.27500};
     // 显示范围精度
     MKCoordinateSpan span = {0.01,0.01};
     // 显示区域
     MKCoordinateRegion region = {coord2D,span};
     // 给地图设置显示区域
     [mapView setRegion:region animated:YES];
     [self.view addSubview:mapView];

     // 创建anation对象
     CLLocationCoordinate2D showCoord = {23.117000,113.27500};
     YXYCAnation *anation1 = [[YXYCAnation alloc] initWithCoordinate2D:showCoord];
     anation1.title = @"越秀公园";
     anation1.subtitle = @"小标题";
     [mapView addAnnotation:anation1];
 }

 #pragma mark -MKAnnotationView delegate-
 - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
 {
     static NSString *identify = @"Annotian";
     MKPinAnnotationView *annotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identify];
     if (annotationView == nil) {
         // MKPinAnnotationView 是大头针视图
         annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identify];
         // 设置是否显示标题视图
         annotationView.canShowCallout = YES;

         UIButton *button = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
         [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
         annotationView.rightCalloutAccessoryView = button;
     }
     annotationView.pinColor = MKPinAnnotationColorRed;
     annotationView.animatesDrop = YES;

     return annotationView;
 }

 - (void)buttonAction:(UIButton *)sender
 {
     NSLog(@"显示公园简介");
 }

 @end

 #import <Foundation/Foundation.h>
 #import <MapKit/MapKit.h>
 @interface YXYCAnation : NSObject<MKAnnotation>

 @property (nonatomic, assign) CLLocationCoordinate2D coordinate;
 @property (nonatomic, copy) NSString *title;
 @property (nonatomic, copy) NSString *subtitle;

 - (id)initWithCoordinate2D:(CLLocationCoordinate2D)coordinate;

 @end

 #import "YXYCAnation.h"

 @implementation YXYCAnation

 - (id)initWithCoordinate2D:(CLLocationCoordinate2D)coordinate
 {
     self = [super init];
     if (self != nil) {
         _coordinate = coordinate;
     }
     return self;
 }

 @end

效果图如下：