如何使用故事板给出位置坐标以在ios中绘制地图中的点？

Question

我正在使用storyboard在视图控制器中创建地图视图.

当我使用以下代码时.

-(void) mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    CLLocationDistance distance = 1000;   
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate,
                               distance, 
                               distance);
    MKCoordinateRegion adjusted_region = [self.mapView regionThatFits:region];
    [self.mapView setRegion:adjusted_region animated:YES];
}

在美国加利福尼亚州旧金山绘制一个点.该 userLocation坐标是预定值MapKit.h框架.现在我创建一个

-(void) mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    CLLocationDistance distance = 1000;
    CLLocationCoordinate2D myCoordinate;
    myCoordinate.latitude = 13.04016;
    myCoordinate.longitude = 80.243044;
    MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(myCoordinate, 
                                                                   distance, 
                                                                   distance);
    MKCoordinateRegion adjusted_region = [self.mapView regionThatFits:region];
    [self.mapView setRegion:adjusted_region animated:YES];
}

这里,显示具有中心坐标的区域.但是,在坐标位置没有绘制点.

如何在该坐标位置绘制点或注释？

Answer 1

在didUpdateUserLocation方法中尝试此代码

    MKPointAnnotation*    annotation = [[MKPointAnnotation alloc] init];
    CLLocationCoordinate2D myCoordinate;
    myCoordinate.latitude=13.04016;
    myCoordinate.longitude=80.243044;
    annotation.coordinate = myCoordinate;
    [self.mapView addAnnotation:annotation];