iOS mapView - 只需轻轻一按即可拖动图钉

Posted 2023-05-08

【中文标题】iOS mapView - 只需轻轻一按即可拖动图钉

【英文标题】：iOS mapView - drag pin with only one tap

【发布时间】：2013-06-23 12:38:34

【问题描述】：

我有一个 MapView，上面有两个引脚（自定义引脚）。

两个图钉都设置为可拖动，但我的问题是在我可以拖动其中一个之前，我必须先选择它，然后才能开始拖动它。这意味着在屏幕上点按两次。

我知道this 的答案，但他的地图上只有一个图钉，在我看来，一次只能选择一个图钉，因此设置 [MyPin setSelected:YES];在这种情况下不会帮助我。

感谢您的帮助！

//Custom pin on mapview
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation 

            MKAnnotationView *MyPin=[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"];

             MyPin.draggable = YES;

            //Get annotaion title to determine what image to use
            MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc]init];
            annotationPoint = annotation;

            if([annotationPoint.title isEqualToString:@"user"])
            
                MyPin.image = [UIImage imageNamed:@"userLocation_pin"];
                MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]);
            
            else if ([annotationPoint.title isEqualToString:@"destination"])
            
                MyPin.image = [UIImage imageNamed:@"destination_pin_up"];
                MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]);
            

            return MyPin;
        

【参考方案1】：

通过添加 [MyPin setSelected:YES] 设法解决了我自己的问题；在这样的 if 语句中：

//Custom pin on mapview
-(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation 

            MKAnnotationView *MyPin=[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"current"];

             MyPin.draggable = YES;

            //Get annotaion title to determine what image to use
            MKPointAnnotation *annotationPoint = [[MKPointAnnotation alloc]init];
            annotationPoint = annotation;

            if([annotationPoint.title isEqualToString:@"user"])
            
                MyPin.image = [UIImage imageNamed:@"userLocation_pin"];
                MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]);
                [MyPin setSelected:YES];
            
            else if ([annotationPoint.title isEqualToString:@"destination"])
            
                MyPin.image = [UIImage imageNamed:@"destination_pin_up"];
                MyPin.centerOffset = CGPointMake(-13, -5); //Offset custom image to display at the exact pin point GPointMake([left/right], [up/down]);
                [MyPin setSelected:YES];
            

            return MyPin;