如何识别哪个销被挖掘

Question

我有一个应用程序MKMapView和大量的针脚在这张地图上。

每个销钉都得到了rightCalloutAccessoryView。我用这种方式创建它：

UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; 
[rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside]; 
pinView.rightCalloutAccessoryView = rightButton; 

我应该怎么知道，哪个针被点击？ Thnx

Answer 1

在showDetails:方法中，您可以从地图视图的selectedAnnotations数组中获取引脚。虽然属性是一个NSArray，刚刚得到的数组中的第一个项目，因为地图视图只允许一次选中一个针：与其做addTarget和实施

//To be safe, may want to check that array has at least one item first. 

id<MKAnnotation> ann = [[mapView selectedAnnotations] objectAtIndex:0]; 

// OR if you have custom annotation class with other properties... 
// (in this case may also want to check class of object first) 

YourAnnotationClass *ann = [[mapView selectedAnnotations] objectAtIndex:0]; 

NSLog(@"ann.title = %@", ann.title); 

顺便说一句，一种自定义方法，可以使用地图视图的calloutAccessoryControlTapped委托方法。窃听注释在view参数可用：

-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view 
    calloutAccessoryControlTapped:(UIControl *)control 
{ 
    NSLog(@"ann.title = %@", view.annotation.title); 
} 

务必从viewForAnnotation删除addTarget如果使用calloutAccessoryControlTapped。