#import 
    
     #import 
     
      #import 
      
       @interface mylocation : UIViewController
       
        @property (retain, nonatomic) IBOutlet MKMapView *m_map;- (IBAction)return:(id)sender;@end
       
      
     
    

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view from its nib.    self.m_map.showsUserLocation=YES;    CLLocationManager *locationManager = [[CLLocationManager alloc] init];//创建位置管理器    locationManager.delegate=self;//设置代理    locationManager.desiredAccuracy=kCLLocationAccuracyBest;//指定需要的精度级别    locationManager.distanceFilter=1000.0f;//设置距离筛选器    [locationManager startUpdatingLocation];//启动位置管理器    MKCoordinateSpan theSpan;    //地图的范围 越小越精确    theSpan.latitudeDelta=0.05;    theSpan.longitudeDelta=0.05;    MKCoordinateRegion theRegion;    theRegion.center=[[locationManager location] coordinate];    theRegion.span=theSpan;    [self.m_map setRegion:theRegion];    [locationManager release];}

设置标注

- (IBAction)FindUs:(id)sender {    self.UsMap.hidden = NO;    CLLocationCoordinate2D coord;    coord.latitude = 34.7993;    coord.longitude = 113.6939;    POI *poi = [[POI alloc]initWithCoords:coord];   [UsMap addAnnotation:poi];         MKCoordinateRegion theRegion = { {0.0, 0.0 }, { 0.0, 0.0 } };    theRegion.center=coord;    [UsMap setZoomEnabled:YES];    [UsMap setScrollEnabled:YES];    theRegion.span.longitudeDelta = 0.01f;    theRegion.span.latitudeDelta = 0.01f;    [UsMap setRegion:theRegion animated:YES];}

@interface POI : NSObject 
    
      {           CLLocationCoordinate2D coordinate;       NSString *subtitle;       NSString *title;   }   @property (nonatomic,readonly) CLLocationCoordinate2D coordinate;   @property (nonatomic,retain) NSString *subtitle;   @property (nonatomic,retain) NSString *title;   -(id) initWithCoords:(CLLocationCoordinate2D) coords;   @end
    

@implementation POI   @synthesize coordinate,subtitle,title;   - (id) initWithCoords:(CLLocationCoordinate2D) coords{           self = [super init];           if (self != nil) {                   coordinate = coords;                }           return self;       }   - (void) dealloc   {       [title release];       [subtitle release];       [super dealloc];   }   @end

/获取位置信息    CLGeocoder *geocoder = [[CLGeocoder alloc] init];    [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray* placemarks,NSError *error)    {        if (placemarks.count >0   )        {            CLPlacemark * plmark = [placemarks objectAtIndex:0];                        NSString * country = plmark.country;            NSString * city    = plmark.locality;                                    NSLog(@"%@-%@-%@",country,city,plmark.name);            self.m_locationName.text =plmark.name;        }                NSLog(@"%@",placemarks);            }];        //[geocoder release];