annotationView didChangeDragState가 여러 번 실행되었습니다.

Question

IOS4 맵킷에서 드래그 가능한 특수 효과를 얻었으며 특수 효과를 새로운 위치로 드래그하면 이벤트를 호출하려고합니다. 코드는 단순히 업데이트를 기록하고 다음 사용자 지정 메서드 내 서버로의 갱신을 보낼 주석을 알려줍니다

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)annotationView 
    didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState 
{ 
    if (newState == MKAnnotationViewDragStateEnding) 
    { 
     CLLocationCoordinate2D droppedAt = annotationView.annotation.coordinate; 
     NSLog(@"dropped at %f,%f", droppedAt.latitude, droppedAt.longitude); 

     //update the annotation 
     //see if its an information annotation 
     if ([annotationView.annotation isKindOfClass:[InfoAnnotation class]]) { 
      NSLog(@"Info annotation updating.."); 
      InfoAnnotation* userAnnotation = ((InfoAnnotation *)annotationView.annotation); 
      [userAnnotation updateLocationWithServerForConvoy: self.title]; 
     } 

    } 
} 

: 같은

내 코드는 현재 보인다.

이 방법은 해고를 여러 번 받고있는 것 같다, 여기에 로그를 참조하십시오

2011-06-15 01:12:39.347 Convoy[1699:207] dropped at 37.340206,-122.027550 
2011-06-15 01:12:39.347 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:39.658 Convoy[1699:207] dropped at 37.340206,-122.027550 
2011-06-15 01:12:39.659 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:39.957 Convoy[1699:207] dropped at 37.340206,-122.027550 
2011-06-15 01:12:39.958 Convoy[1699:207] Info annotation updating.. 


2011-06-15 01:12:43.415 Convoy[1699:207] dropped at 37.339251,-122.026691 
2011-06-15 01:12:43.416 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:43.713 Convoy[1699:207] dropped at 37.339251,-122.026691 
2011-06-15 01:12:43.713 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:44.006 Convoy[1699:207] dropped at 37.339251,-122.026691 
2011-06-15 01:12:44.006 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:44.297 Convoy[1699:207] dropped at 37.339251,-122.026691 
2011-06-15 01:12:44.297 Convoy[1699:207] Info annotation updating.. 


2011-06-15 01:12:54.825 Convoy[1699:207] dropped at 37.337135,-122.025833 
2011-06-15 01:12:54.825 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:55.150 Convoy[1699:207] dropped at 37.337135,-122.025833 
2011-06-15 01:12:55.150 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:55.475 Convoy[1699:207] dropped at 37.337135,-122.025833 
2011-06-15 01:12:55.476 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:55.771 Convoy[1699:207] dropped at 37.337135,-122.025833 
2011-06-15 01:12:55.772 Convoy[1699:207] Info annotation updating.. 
2011-06-15 01:12:56.070 Convoy[1699:207] dropped at 37.337135,-122.025833 
2011-06-15 01:12:56.070 Convoy[1699:207] Info annotation updating.. 

내가 그것이라고 배의 금액에 1을 추가하는 것 (간격에서 예) 드래그 할 때마다. 아무도 내게이 문제의 원인이 될 수있는 아이디어를 줄 수 있습니까?

Answer 1

이상하게 보입니다. 단순히 주석 대신에 setCoordinate 메소드를 사용하는 것에 대해 생각해 봤습니까? MapKit은 드래그하여 MKMapAnnotation이 이동 될 때마다이 함수를 호출합니다. 사람이 여전히 궁금해하는 경우

Answer 2

- 당신은 MKAnnotationViewDragStateNone에 MKAnnotationView 드래그 상태를 설정해야합니다.

그래서 코드는 다음과 같습니다 우리는이 문제가있는 유일한 사람처럼

- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)annotationView didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState 
{ 
    if (newState == MKAnnotationViewDragStateEnding) 
    { 
    /* ... */ 
    [annotationView setDragState:MKAnnotationViewDragStateNone]; 
    // If you are animating - move the above into the completion block 
    } 
}