如何在按下按钮时调用此方法

Question

如何在按下动态按钮时调用下面的方法？

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

Answer 1

这是地图视图的委托方法，因此您的代码不会直接调用它。当点击注解视图的rightCalloutAccessoryView或leftCalloutAccessoryView时，地图视图会调用该方法。

创建地图视图时，设置其委托属性并在viewForAnnotation方法中创建一个按钮并将其设置为rightCalloutAccessoryView或leftCalloutAccessoryView。

例如：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation 
{ 
    static NSString *annotationIdentifier = @"annot"; 
    MKPinAnnotationView *pav = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:annotationIdentifier]; 
    if (!pav) 
    { 
     pav = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:annotationIdentifier] autorelease]; 
     pav.canShowCallout = YES; 
     UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
     pav.rightCalloutAccessoryView = rightButton; 
    } 
    else { 
     pav.annotation = annotation; 
    } 

    return pav; 
} 

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control 
{ 
    //handle tap on annotation... 
}