地图 + 定位

1>

需要子类化协议 :

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

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

@end

2>

#import "NearbyWeiboViewController.h"
#import <MapKit/MapKit.h>
#import "WeiboAnnotation.h"

@interface NearbyWeiboViewController ()<CLLocationManagerDelegate,MKMapViewDelegate>

@property (nonatomic,strong)CLLocationManager *locationManger;

@property (nonatomic,strong)MKMapView *mapView;

@end

/**
 *在地图上显示标注视图MKAnnotationView
 
    1.创建MKAnnotation协议(model,用来记录标注视图的位置)
    2.将MKAnnotation类创建的对象加到地图上
    3.实现协议方法,自己创建标注视图
 */

@implementation NearbyWeiboViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //创建地图
    _mapView = [[MKMapView alloc] initWithFrame:self.view.bounds];
    //地图的类型  MKMapTypeSatellite卫星地图
    _mapView.mapType = MKMapTypeStandard;
    
    //显示用户的位置(触发协议方法,显示标注视图)
    _mapView.showsUserLocation = YES;
    
    _mapView.delegate = self;
    
    [self.view addSubview:_mapView];
    
    //定位
    _locationManger = [[CLLocationManager alloc] init];
    
    //设置精确度
    _locationManger.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
    _locationManger.delegate = self;
    [_locationManger startUpdatingLocation];
    
    
    //创建MKAnnotation用来在地图上显示标注
    WeiboAnnotation *annotatino = [[WeiboAnnotation alloc] init];
    annotatino.coordinate = CLLocationCoordinate2DMake(39.925398, 116.152992);
    
    //设置标题
    annotatino.title = @"无线互联";
    //将annotatino添加到地图,会触发mapView的协议方法,创建标注视图
    [_mapView addAnnotation:annotatino];
    
}

#pragma mark -CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations{
    //停止定位
    [manager stopUpdatingLocation];
    
    //取得用户所在的位置
    CLLocation *location = [locations lastObject];
    //取得经纬度
    CLLocationCoordinate2D coordinate = location.coordinate;
    
    /**
     *      MKCoordinateRegion{
            CLLocationCoordinate2D center;经纬度
            MKCoordinateSpan span; 区域的详细程度
            }
     *
     *
     */
    
    //span控制区域的详细程度,值越小,地图越详细
    MKCoordinateSpan span = MKCoordinateSpanMake(.1, .1);
    
    MKCoordinateRegion region = MKCoordinateRegionMake(coordinate, span);
    //设置地图的显示区域
    [_mapView setRegion:region animated:YES];

}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation{
    
    //如果是用户自己的位置,不需要显示大头针
    if ([annotation isKindOfClass:[MKUserLocation class]]) {
        
        return nil;
    }
    
    static NSString *identy = @"map";
    
    //创建标注视图MKAnnotationView ->子类:MKPinAnnotationView(大头针)
    /**
     *MKAnnotationView:指定显示的图片
     *MKPinAnnotationView:会默认显示大头针
     *
     */
    MKPinAnnotationView *view = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identy];
    if (view == nil) {
        
        view = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identy];
        
        //显示图片
//        view.image = [UIImage imageNamed:@"001.png"];
        
        //显示标题
        view.canShowCallout = YES;
        
        //设置大头针的颜色
        view.pinColor = MKPinAnnotationColorGreen;
        
        //设置辅助视图
        view.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeInfoDark];
        
        //从天而降
        view.animatesDrop = YES;
    }
    
    return view;
}

@end