如何通過地圖上的公開按鈕調用segue？

Question

我有一個應用程序，繪製在地圖視圖上的引腳。

每個引腳使用此代碼來顯示詳細披露按鈕，當點擊時調用一個showDetail方法，然後調用prepareForSegue方法。我認爲這裏有很多額外的工作。

我應該消除showDetail並只調用prepareForSegue方法嗎？但我將如何通過MyLocation對象？

下面是代碼：

Thx提前！

Answer 1

通常你無法添加目標按鈕，而是剛剛成立的rightCalloutAccessoryView（像你這樣），然後寫一個calloutAccessoryControlTapped方法，如：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation { 
    static NSString *identifier = @"MyLocation"; 
    if ([annotation isKindOfClass:[MyLocation class]]) { 

     MKPinAnnotationView *annotationView = (MKPinAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:identifier]; 
     if (annotationView == nil) { 
      annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier]; 
      annotationView.enabled = YES; 
      annotationView.canShowCallout = YES; 
      annotationView.image = [UIImage imageNamed:@"locale.png"]; // since you're setting the image, you could use MKAnnotationView instead of MKPinAnnotationView 
      annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
     } else { 
      annotationView.annotation = annotation; 
     } 

     return annotationView; 
    } 

    return nil; 
} 

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control 
{ 
    if (![view.annotation isKindOfClass:[MyLocation class]]) 
     return; 

    // use the annotation view as the sender 

    [self performSegueWithIdentifier:@"DetailVC" sender:view]; 
} 

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(MKAnnotationView *)sender 
{ 
    if ([segue.identifier isEqualToString:@"DetailVC"]) 
    { 
     DetailViewController *destinationViewController = segue.destinationViewController; 

     // grab the annotation from the sender 

     destinationViewController.receivedLocation = sender.annotation; 
    } else { 
     NSLog(@"PFS:something else"); 
    } 
}