Question

我有一个带有引脚注释的地图视图。当用户按下引脚信息的显示按钮时，我需要将引脚的坐标传递给详细视图。当我进入showDetails方法时，如何获取引脚的坐标？我正在使用下一个代码。

- (void)showDetails:(id)sender {

 DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController" bundle:nil ];

    // HERE I NEED TO PASS THE COORDINATES OF THE PIN TO THE DETAILVIEWCONTROLLER.
    [self.navigationController pushViewController:detailViewController animated:YES];
 [detailViewController release];
}


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

 // If it's the user location, just return nil.
 if ([annotation isKindOfClass:[MKUserLocation class]])
  return nil;
 else { // Handles the other annotations.
  // Try to dequeue an existing pin view first.
  static NSString *AnnotationIdentifier = @"AnnotationIdentifier";
  MKPinAnnotationView *pinView = (MKPinAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];

  if (!pinView) {
   // If an existing pin view was not available, creates one.
   MKPinAnnotationView *customPinView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
   customPinView.animatesDrop = YES;
   customPinView.canShowCallout = YES;

   // Adds a detail disclosure button.
   UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
   [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside];
   customPinView.rightCalloutAccessoryView = rightButton;

   return customPinView;
  } else
   pinView.annotation = annotation;
 }

 return nil;
}

感谢阅读。

Answer 1

您可以按照以下方式自定义UIButton按钮：

@interface CustomButton : UIButton {

CLLocationCoordinate2D pinCoordinate; }

现在在你的viewForAnnotation中：

// Adds a detail disclosure button.
CustomButton *rightButton = [CustomButton buttonWithType:UIButtonTypeDetailDisclosure];
rightButton.pinCoordinate = annotation.coordinate
[rightButton addTarget:self action:@selector(showDetails:)   forControlEvents:UIControlEventTouchUpInside];
customPinView.rightCalloutAccessoryView = rightButton;

最后得到showDetails方法中的坐标：

CLLocationCoordinate2D currentCoord = ((CustomButton*)sender).pinCoordinate;

Answer 2

我现在不能给你一个有效的代码解决方案，因为我这里没有我的mac。但我可以告诉你一个可能的方法。

在DetailViewController中创建一个填充其属性的方法，以便在推送之前从showDetails中调用它。所以事件的顺序就是这样。

点击披露按钮 - ＆gt; showDetails调用 - ＆gt; DetailViewController创建并填充 - ＆gt;推DetailViewController

希望这有助于你

将UINavigationController的坐标转换为showDetails方法

2 个答案: