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：