地图定位

#import<MapKit/MapKit.h>

#import<CoreLocation/CoreLocation.h>

{

//定义变量地图视图、定位管理对象、地图解析对象

MKMapView *mv;

CLLocationManager *manager;

CLGeocoder *geo;

}

{    [super viewDidLoad];   

 //初始化地图视图

    mv = [[MKMapView alloc]initWithFrame:self.view.bounds];    mv.mapType = MKMapTypeStandard; 

   mv.zoomEnabled = YES; 

   mv.rotateEnabled = YES;   

 mv.scrollEnabled = YES;

    mv.showsUserLocation = YES;   

 [self.view addSubview:mv];   

 //定位    

CLLocationCoordinate2D center = {34,101};  

  MKCoordinateSpan span = {0.01,0.01};  

  MKCoordinateRegion region = {center,span};  

  [mv setRegion:region animated:YES];  

  //初始化定位管理器   

 manager = [[CLLocationManager alloc]init]; 

   [manager requestWhenInUseAuthorization];  

  manager.delegate = self;   

 manager.desiredAccuracy = kCLLocationAccuracyBest;    manager.distanceFilter = kCLDistanceFilterNone;    

[manager startUpdatingLocation];   

 //初始化地址解析对象   

 geo = [[CLGeocoder alloc]init];}

//定位更新响应方法

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray*)locations

{   

 //获取当前位置  

  CLLocation *loc = [locations lastObject]; 

   //定位  

  CLLocationCoordinate2D center = 

{

loc.coordinate.latitude,loc.coordinate.longitude};    MKCoordinateSpan span = {0.01,0.01};  

  MKCoordinateRegion region = {center,span};  

  [mv setRegion:region animated:YES];    

NSMutableString *mSt = [NSMutableString string];  

  //反向解析经纬度获取地址   

 [geo reverseGeocodeLocation:loc completionHandler:^(NSArray* _Nullable placemarks, NSError * _Nullable error) {        CLPlacemark *pla = [placemarks firstObject];      

  NSArray *arr = [pla.addressDictionary objectForKey:@"FormattedAddressLines"];      

  //拼接地址       

 for (NSString *str in arr) { 

           [mSt appendString:str];      

  }       

 //添加锚点       

 MKPointAnnotation *anno = [[MKPointAnnotation alloc]init];        anno.coordinate = center;     

   anno.title = @"我的位置";    

    anno.subtitle = mSt;       

 [mv addAnnotation:anno];   

 }];

}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation

{    

CLLocationCoordinate2D loc = [userLocation coordinate];  

  //放大地图到自身的经纬度位置。  

  MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(loc, 250, 250); 

   [mv setRegion:region animated:YES];

}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id)annotation

{

static NSString *cellid = @"cellid";

MKAnnotationView *anno = [mapView dequeueReusableAnnotationViewWithIdentifier:cellid];

if (!anno) {

anno = [[MKAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:cellid];

}

anno.canShowCallout = YES;

return anno;

}