ios中地图

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 <UIKit/UIKit.h>
#import <MapKit/MapKit.h>

#import <CoreLocation/CoreLocation.h>
@interface ViewController : UIViewController<CLLocationManagerDelegate,MKMapViewDelegate>
@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<MKAnnotation>)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 <MKAnnotation> 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<count; i++ ) //load points C array by converting coordinates to points
    {
        CLLocationCoordinate2D coordinate = [(id <MKAnnotation>)[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