参考文章  http://blog.csdn.net/tangaowen/article/details/6527901

http://www.cnblogs.com/tangbinblog/archive/2012/07/11/2586715.html

 

 

http://www.cocoachina.com/newbie/basic/2011/1014/3367.html

#import 
     
      #import 
      
       #import 
       
        @interface ViewController : UIViewController
        
         @property (retain, nonatomic) IBOutlet UITextField *latTxt;@property (retain, nonatomic) IBOutlet UITextField *lonTxg;@property (retain, nonatomic) IBOutlet UITextField *heightTxt;@end
        
       
      
     

#import "ViewController.h"#import "MapMark.h"@interface ViewController ()//定位管理@property(nonatomic,retain)CLLocationManager *manager;@property(nonatomic,retain)MKMapView *mapview;@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];    self.manager=[[CLLocationManager alloc] init];    _manager.delegate=self;    _manager.desiredAccuracy=kCLLocationAccuracyBest;    _manager.distanceFilter=1000.0;    [_manager release];    self.mapview=[[MKMapView alloc] initWithFrame:CGRectMake(0, 210, 320, 200)];    _mapview.delegate=self;    _mapview.mapType=MKMapTypeStandard;    _mapview.zoomEnabled=YES;    _mapview.showsUserLocation=YES;//调用cclocaiton    [self.view addSubview:_mapview];    [_mapview release];}-(void)viewDidAppear:(BOOL)animated{    [super viewDidAppear:animated];    [_manager startUpdatingLocation];    }-(void)viewDidDisappear:(BOOL)animated{    [super viewDidDisappear:animated];    [_manager stopUpdatingLocation];}#pragma mark -CLLocationManager delegate-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{    NSLog(@"__%@",locations);   CLLocation  *lc= [locations lastObject];    self.latTxt.text=[NSString stringWithFormat:@"%3.5f",lc.coordinate.latitude];    self.lonTxg.text=[NSString stringWithFormat:@"%3.5f",lc.coordinate.longitude];    self.heightTxt.text=[NSString stringWithFormat:@"%3.5f",lc.altitude];        //设置显示区域   MKCoordinateRegion region=MKCoordinateRegionMake(lc.coordinate, MKCoordinateSpanMake(0.05, 0.005));    [_mapview setRegion:region animated:YES];    MapMark *mark=[[MapMark alloc] initwithCoordinate:lc.coordinate];    mark.title=@"小A";    mark.subtitle=@"20";    //    、、39.938, 116.416    CLLocationCoordinate2D l2d;    l2d.latitude=37.78594;    l2d.longitude=-122.40717;    MapMark *mark1=[[MapMark alloc] initwithCoordinate:l2d];    mark1.title=@"小b";    mark1.subtitle=@"20";    [_mapview addAnnotation:mark];//只是把坐标的资料，放入到集合中。    [_mapview addAnnotation:mark1];}#pragma mark -map delegate//这个代理方法，会依照坐标资料的集合进行render-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id
     
      )annotation{        NSLog(@"-->vieforannotation-->%@",annotation);    //判断是否刚添加的标注    if ([annotation isKindOfClass:[MapMark class]]) {                static NSString *bridgeAnnotation=@"annotation";        //从缓存中取值        MKPinAnnotationView *view=(MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:bridgeAnnotation];        if (view==nil) {            view=[[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:bridgeAnnotation] autorelease];            view.pinColor=MKPinAnnotationColorPurple;            view.animatesDrop=YES;           view.canShowCallout=YES;            UIButton *btn=[UIButton buttonWithType:UIButtonTypeRoundedRect];            btn.frame=CGRectMake(0, 0, 50, 50);            [btn setTitle:@"click" forState:UIControlStateNormal];            view.rightCalloutAccessoryView=btn;        }        view.annotation=annotation;//充缓存中取出来重新设置坐标信息        return view;                    }return nil;    }//点击标记-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view{    NSLog(@"-->%@",[view.annotation class]);    if ([view.annotation isMemberOfClass:[MapMark class]]) {        UIButton *btn=(UIButton *)[view rightCalloutAccessoryView];        NSLog(@"--->%@",btn);    }}#define MINIMUM_ZOOM_ARC 0.014 //approximately 1 miles (1 degree of arc ~= 69 miles)#define ANNOTATION_REGION_PAD_FACTOR 1.15#define MAX_DEGREES_ARC 360//size the mapView region to fit its annotations- (void)zoomMapViewToFitAnnotations:(MKMapView *)mapView animated:(BOOL)animated{    NSArray *annotations = mapView.annotations;    int count = [mapView.annotations count];    if ( count == 0) { return; } //bail if no annotations        //convert NSArray of id 
      
        into an MKCoordinateRegion that can be used to set the map size    //can't use NSArray with MKMapPoint because MKMapPoint is not an id    MKMapPoint points[count]; //C array of MKMapPoint struct    for( int i=0; i
       
        
         )[annotations objectAtIndex:i] coordinate];        points[i] = MKMapPointForCoordinate(coordinate);    }    //create MKMapRect from array of MKMapPoint    MKMapRect mapRect = [[MKPolygon polygonWithPoints:points count:count] boundingMapRect];    //convert MKCoordinateRegion from MKMapRect    MKCoordinateRegion region = MKCoordinateRegionForMapRect(mapRect);        //add padding so pins aren't scrunched on the edges    region.span.latitudeDelta  *= ANNOTATION_REGION_PAD_FACTOR;    region.span.longitudeDelta *= ANNOTATION_REGION_PAD_FACTOR;    //but padding can't be bigger than the world    if( region.span.latitudeDelta > MAX_DEGREES_ARC ) { region.span.latitudeDelta  = MAX_DEGREES_ARC; }    if( region.span.longitudeDelta > MAX_DEGREES_ARC ){ region.span.longitudeDelta = MAX_DEGREES_ARC; }        //and don't zoom in stupid-close on small samples    if( region.span.latitudeDelta  < MINIMUM_ZOOM_ARC ) { region.span.latitudeDelta  = MINIMUM_ZOOM_ARC; }    if( region.span.longitudeDelta < MINIMUM_ZOOM_ARC ) { region.span.longitudeDelta = MINIMUM_ZOOM_ARC; }    //and if there is a sample of 1 we want the max zoom-in instead of max zoom-out    if( count == 1 )    {        region.span.latitudeDelta = MINIMUM_ZOOM_ARC;        region.span.longitudeDelta = MINIMUM_ZOOM_ARC;    }    [mapView setRegion:region animated:animated];}- (void)viewWillAppear:(BOOL)animated{    [self zoomMapViewToFitAnnotations:_mapview animated:animated];    //or maybe you would do the call above in the code path that sets the annotations array}- (void)dealloc {    [_latTxt release];    [_lonTxg release];    [_heightTxt release];    [super dealloc];}@end
        
       
      
     

其中