在MkMapView中添加自己当前位置的大头针

在利用MKMapView显示自己当前位置的地图一文中介绍了放大地图和显示自己的位置,下面介绍一下在地图自己位置上添加大头针,实现如下所示:

实现的具体过程很简单:

首先实现MKMapViewDelegate协议:

@interface iphone_MapViewController : UIViewController 
<CLLocationManagerDelegate,MKMapViewDelegate>{ 
    IBOutlet MKMapView *mapView; 
}

 

然后添加代码：

- (void)viewDidLoad { 
    [super viewDidLoad]; 
     self.mapView.delegate=self; 
    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

    MKCoordinateRegion theRegion = { {0.0, 0.0 }, { 0.0, 0.0 } }; 
    theRegion.center=[[locationManager location] coordinate]; 
    [locationManager release]; 
    [mapView setZoomEnabled:YES]; 
    [mapView setScrollEnabled:YES]; 
    theRegion.span.longitudeDelta = 0.01f; 
    theRegion.span.latitudeDelta = 0.01f; 
    [mapView setRegion:theRegion animated:YES]; 
}

- (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation 
{ 
    MKPinAnnotationView *pinView = nil;

        static NSString *defaultPinID = @"com.invasivecode.pin"; 
        pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID]; 
        if ( pinView == nil ) pinView = [[[MKPinAnnotationView alloc] 
                                          initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease]; 
        pinView.pinColor = MKPinAnnotationColorRed; 
        pinView.canShowCallout = YES; 
        pinView.animatesDrop = YES; 
         [mapView.userLocation setTitle:@"欧陆经典"]; 
       [mapView.userLocation setSubtitle:@"vsp"]; 
     return pinView; 
}

运行即可。