iOS 地图(MKMapView)

//定位  需要在info中添加NSLocationWhenInUseUsageDescription

   if ([[UIDevice currentDevice].systemVersion doubleValue]>=8.0) {
        //获取权限
        [self.locationManager requestWhenInUseAuthorization];
    }
    //开始定位
    [self.locationManager startUpdatingLocation];

//懒加载
-(CLLocationManager *)locationManager{
    
    if (!_locationManager) {
        
        _locationManager=[[CLLocationManager alloc]init];
        
        _locationManager.delegate=self; //
    }
    return _locationManager;
    
}

 创建地图

 self.mapView =[[MKMapView alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    //1.跟踪用户位置(显示用户的具体位置)
    self.mapView.userTrackingMode =MKUserTrackingModeFollow;
    
    //2.设置地图类型
//    self.mapView.mapType=MKMapTypeStandard;
    
    //设置代理
    self.mapView.delegate=self;
    
//    self.mapView.showsUserLocation=YES;
    
    [self.view addSubview:self.mapView];



#pragma mark - NKMapViewDelegate
//当用户的位置更新,就会调用(不断地监控用户的位置,调用频率特别高)
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{
  //  MKUserLocation  大头针模型对象
    NSLog(@"%f %f",userLocation.location.coordinate.longitude ,userLocation.location.coordinate.latitude);
    userLocation.title=@"天苍苍野茫茫风吹草地见牛羊";
    userLocation.subtitle=@"床前光,地上霜";
    
    //设置地图的中心点 ( 用户所在的区域)
   // [mapView setCenterCoordinate:userLocation.location.coordinate animated:YES];]
    
     //设置地图的显示范围
    //设置跨度
    MKCoordinateSpan span =MKCoordinateSpanMake(0.5,0.5);
    
    CLLocationCoordinate2D center = userLocation.location.coordinate;
    mapView.region=MKCoordinateRegionMake(center, span);

}

//获取当前跨度
-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
    
    
    NSLog(@"%f %f",mapView.region.span.latitudeDelta,mapView.region.span.longitudeDelta);
}

添加大头针 (自己定义 需要创建一个遵守MKAnnotation协议的类)

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

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

创建大头针

   //创建手势
    UITapGestureRecognizer * longpress =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapMapVIew:)];
 
    //添加手势
    [self.mapView addGestureRecognizer:longpress];


//响应手势事件
- (void)tapMapVIew:(UITapGestureRecognizer * )tap{
    
    //1.获得用户在地图点击的位置(x,y)
    CGPoint point =[tap locationInView:tap.view];
    
    //2.将数学坐标转为 地理经纬度坐标
     CLLocationCoordinate2D coordinate= [self.mapView convertPoint:point toCoordinateFromView:self.mapView];

    //3.创建大头针模型,添加大头针到地图上(自定义的大头针类)
    WBAnnotation *anno =[[WBAnnotation alloc]init];
    anno.coordinate =coordinate;
    anno.title=@"大哥";
    anno.subtitle=@"你好棒";
    
    [self.mapView addAnnotation:anno];
    
}