清洁解决方案知道哪个MKAnnotation已经被窃听？ [英] Clean solution to know which MKAnnotation has been tapped?

问题描述

好的，所以你通常有一些对象X你想在MKMapView注释。您这样做：

  DDAnnotation * annotation = [[DDAnnotation alloc] initWithCoordinate：poi.geoLocation.coordinate title：@My注解]; 
 [_mapView addAnnotation：annotation]; 
  

然后在

中创建注释视图

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

当一些标注被点击时，你可以处理这个事件：

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

将X传递到最新点击事件的最干净的解决方案是什么？

$ b $如果我理解你的问题，你应该添加一个引用或属性到你的DDAnnotation类，以便在你的calloutAccessoryControlTapped方法中，你可以访问该对象。

/ p>

  @interface DDAnnotation：NSObject< MKAnnotation> {
 CLLocationCoordinate2D coordinate; 
 id objectX; 
} 
 @property（nonatomic，readonly）CLLocationCoordinate2D coordinate; 
 @property（nonatomic，retain）id objectX; 
  

创建注释时：

  DDAnnotation * annotation = [[DDAnnotation alloc] initWithCoordinate：poi.geoLocation.coordinate title：@My Annotation]; 
 annotation.objectX = objectX; 
 [_mapView addAnnotation：annotation]; 
  

然后：

   - （void）mapView：（MKMapView *）mapView annotationView：（MKAnnotationView *）view calloutAccessoryControlTapped：（UIControl *）control {
 
 DDAnnotation * anno = view.annotation; 
 //通过
访问对象[anno.objectX callSomeMethod]; 
} 
  

Ok, so you typically have some object X you want to be annotated inside a MKMapView. You do this way:

DDAnnotation *annotation = [[DDAnnotation alloc] initWithCoordinate: poi.geoLocation.coordinate title: @"My Annotation"];
[_mapView addAnnotation: annotation];

Then you create the annotation view inside

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

And when some callout gets tapped, you handle the event inside:

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

What's the cleanest solution to pass X down to the latest tap event?

解决方案

If I'm understanding your question, you should add a reference or property to your DDAnnotation class so that in your calloutAccessoryControlTapped method you can access the object.

@interface DDAnnotation : NSObject <MKAnnotation> {
    CLLocationCoordinate2D coordinate;
    id objectX;
}
@property (nonatomic, readonly) CLLocationCoordinate2D coordinate;
@property (nonatomic, retain) id objectX;

When you create the annotation:

DDAnnotation *annotation = [[DDAnnotation alloc] initWithCoordinate:poi.geoLocation.coordinate title: @"My Annotation"];
annotation.objectX = objectX;
[_mapView addAnnotation: annotation];

Then:

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

    DDAnnotation *anno = view.annotation;
    //access object via
    [anno.objectX callSomeMethod];
}

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