objective-c - 如何获取在 objective-c 中单击了哪个注释 UIButtonTypeDetailDisclosure？

Question

我想在单击注释的详细信息按钮时进行详细 View 。但是每个引脚必须有不同的细节 View 。为此，我尝试将标签设置为按钮。然后我将在 calloutAccessoryControlTapped 方法中使用这个标签来添加它们的详细 View 。我的代码如下。但是它在 for 循环中停止了。我该如何解决这个问题？

- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation
{
static NSString *annReuseId = @"test";

MKPinAnnotationView *annView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:annReuseId];
if (annView == nil)
{
    annView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:annReuseId];

    annView.animatesDrop = YES;
    annView.canShowCallout = YES;
    [annView setSelected:YES];
    UIButton *detailButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    annView.rightCalloutAccessoryView=detailButton;
    for (int i=0; i<=[[mapView annotations] count]; i++)
    {
        detailButton.tag =[[[mapView annotations] objectAtIndex: i] integerValue];
        NSLog(@"button %i",detailButton.tag);

    }
}
else {
    annView.annotation = annotation;

}

return annView;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{


NSLog(@"calloutAccessoryControlTapped: annotation = %@", view.annotation);
RestaurantsView *detailView=[[RestaurantsView alloc] initWithNibName:@"RestaurantsView" bundle:nil];
   //here, can set annotation info in some property of detailView
   // [[self navigationController] pushViewController:detailView animated:YES];
   // [detailView release];
[self.view addSubview:detailView.view];
}

Answer 1

您不需要设置详情按钮的标签。您可以删除 viewForAnnotation: 中的整个 for 循环。如果您想访问 calloutAccessoryControlTapped: 中的注释，只需使用 view.annotation 就像您对 NSLog(@"calloutAccessoryControlTapped: annotation = %@", view.annotation);.

如果你真的需要索引，那么使用 [mapView.annotations indexOfObject:view.annotation] 但要小心，因为该数组还可能包含所有其他类型的注释，例如 MKUserLocation.