Objective c 如何在MKAnnotationView中传递坐标

文件.h

File.m

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

@interface mappa : UIViewController <MKMapViewDelegate>
@property (weak, nonatomic) IBOutlet MKMapView *mapView;

@end

---

我怎么能有两个不同的按钮，导致两个不同的链接与相应的坐标？那么，为什么要把所有具有相同类别的人带到地图方向的相同链接上呢。非常感谢。

假设zoomToCurrentLocation方法有效，请首先将其重构为以下内容：

#import "mappa.h"

@interface mappa ()

@end

@implementation mappa

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.mapView.delegate = self;
    self.mapView.mapType = MKMapTypeStandard;
    self.mapView.showsUserLocation = YES;

    MKPointAnnotation * myAnnotation1 = [[MKPointAnnotation alloc] init];
    myAnnotation1.coordinate = CLLocationCoordinate2DMake(45.000000, 7.000000);
    myAnnotation1.title = @"Example one";
    myAnnotation1.subtitle = @"Best one";
    [self.mapView addAnnotation:myAnnotation1];

    MKPointAnnotation * myAnnotation2 = [[MKPointAnnotation alloc] init];
    myAnnotation2.coordinate = CLLocationCoordinate2DMake(46.000000, 8.000000);
    myAnnotation2.title = @"Example one";
    myAnnotation2.subtitle = @"Best two";
    [self.mapView addAnnotation:myAnnotation2];

}





-(void)mapView:
                (MKMapView *)mapView annotationView:
                                                    (MKAnnotationView *)view calloutAccessoryControlTapped:
                                                                                    (UIControl *)control
{


    NSString *url = [NSString stringWithFormat:@"%@",@"http://maps.apple.com/?ll=46.000000,8.000000&daddr=Example one"];
    url = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    [[UIApplication sharedApplication]openURL:[NSURL URLWithString:url]];



}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{



    // If it's the user location, just return nil.
    //if ([annotation isKindOfClass:[MKUserLocation class]])
      //  return nil;

    // Handle any custom annotations.
   if ([annotation isKindOfClass:[MKPointAnnotation class]])
    {
        // Try to dequeue an existing pin view first.
        MKAnnotationView *pinView = (MKAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier:@"CustomPinAnnotationView"];
        if (!pinView)
        {
            // If an existing pin view was not available, create one.
            pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"CustomPinAnnotationView"];

            pinView.canShowCallout = YES;
            pinView.image = [UIImage imageNamed:@"puntatore.png"];
            pinView.calloutOffset = CGPointMake(0, 32);

            // Add a detail disclosure button to the callout.
            UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            pinView.rightCalloutAccessoryView = rightButton;



            // Add an image to the left callout.
            //UIImageView *iconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"puntatore.png"]];
            //pinView.leftCalloutAccessoryView = iconView;
        }
        else
        {
            pinView.annotation = annotation;
        }
        return pinView;
    }
    return nil;

}



- (IBAction)zoomToCurrentLocation:(UIBarButtonItem *)sender
{
    float spanX = 0.00725;
    float spanY = 0.00725;

    MKCoordinateRegion region;

    region.center.latitude = self.mapView.userLocation.coordinate.latitude;
    region.center.longitude = self.mapView.userLocation.coordinate.longitude;

    region.span.latitudeDelta = spanX;
    region.span.longitudeDelta = spanY;

    [self.mapView setRegion:region animated:YES];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

@end

将按钮放在界面中，将它们挂接到两个不同的iAction方法上。打电话

-(void) zoomToLatitude: (CLLocationCoordinate2D)lat
             longitude: (CLLocationCoordinate2D)lon
{
    MKCoordinateRegion region;

    float spanX = 0.00725;
    float spanY = 0.00725;

    region.span.latitudeDelta = spanX;
    region.span.longitudeDelta = spanY;

    region.center.latitude = lon;
    region.center.longitude = lat;

    [self.mapView setRegion:region animated:YES];
}

- (IBAction)zoomToCurrentLocation:(UIBarButtonItem *)sender
{
    [self zoomToLatitude: self.mapView.userLocation.coordinate.latitude
               longitude: self.mapView.userLocation.coordinate.longitude];
}

---

不，我希望每个注释有不同的链接。。。NSString*url=[NSString stringWithFormat:@%@，one]；和其他为其他注释…好的。将视图控制器设置为MKMapViewDelegate并实现-mapView:didSelectAnnotationView:。这样，您就知道选择了哪个注释视图，并且可以执行您希望执行的任何操作。但是，如何将坐标传递给函数：voidmapView:MKMapView*mapView注释视图：MKAnnotationView*视图calloutAccessoryControlTapped？？在calloutAccessoryControlTapped中，注释可以使用view.annotation获得，坐标可以使用view.annotation.coordinate.If我添加NSString*coord=view.annotation.coordinate；不工作。。。我必须补充的地方是什么？

- (IBAction)buttonAction: (id)sender
{
    [self zoomToLatitude: <latitude here>
               longitude: <longitude here>];
}