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さて、いくつかの注釈をロードするマップのビューがあります。すべて正常に動作しますが、これらの注釈を消去して他の注釈を含めたい場合、マップを移動 (スクロール) するまで表示されません。

なにか提案を？

編集:

これを使用する代わりに次のように見えます：

[self updateMap];

私は使用する必要があります:

[self performSelectorOnMainThread:@selector(updateMap) withObject:nil waitUntilDone:true];

新しい注釈を追加するメソッドを更新します。

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2 に答える 2

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次のように試してみてください：

[mapView removeAnnotations:[mapView annotations]];
NSArray *targetArray = /*YOUR ARRAY NAME with object, containing `latitude`, `longitude` and `title` values*/
for (id *item in targetArray) {
    if (item.latitude && item.longitude) {
        MKPin *pin = [[MKPin alloc] init]; // MKPin is your class which specifies the deledate `MKAnnotation`
        pin.coordinate = CLLocationCoordinate2DMake(item.latitude, item.longitude);
        pin.title = item.title;
        [mapView addAnnotation:pin];
    }
}
于 2012-04-19T11:37:40.797 に答える
0

viewdidload で次を使用します。

- (void)viewDidLoad

{

    NSMutableArray* annotations=[[NSMutableArray alloc] init];
    MyAnnotation* myAnnotation = [[MyAnnotation alloc] init];
myAnnotation.coordinate = theCoordinate;
    [annotations addObject:myAnnotation];
    MKMapRect flyTo = MKMapRectNull;
for (id <MKAnnotation> annotation in annotations) 
   {
    NSLog(@"fly to on");
        MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
        MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0, 0);
        if (MKMapRectIsNull(flyTo)) 
        {
               flyTo = pointRect;
        }
        else
        {
               flyTo = MKMapRectUnion(flyTo, pointRect);
       //NSLog(@"else-%@",annotationPoint.x);
        }
     }

// Position the map so that all overlays and annotations are visible on screen.
mapView.visibleMapRect = flyTo;

}

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

{ NSLog(@"マップ ビュー アノテーションへようこそ");

// if it's the user location, just return nil.
if ([annotation isKindOfClass:[MKUserLocation class]])
    return nil;

// try to dequeue an existing pin view first
static NSString* AnnotationIdentifier = @"AnnotationIdentifier";
MKPinAnnotationView* pinView = [[[MKPinAnnotationView alloc]
                                 initWithAnnotation:annotation reuseIdentifier:AnnotationIdentifier] autorelease];
pinView.animatesDrop=YES;
pinView.canShowCallout=YES;
pinView.draggable = NO;
pinView.pinColor=MKPinAnnotationColorGreen;

//button on the right for popup for pins
UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[rightButton setTitle:annotation.title forState:UIControlStateNormal];
[rightButton addTarget:self
                action:@selector(showDetails:)
      forControlEvents:UIControlEventTouchUpInside];
pinView.rightCalloutAccessoryView = rightButton;

//zoom button on the left of popup for pins
UIButton* leftButton = [UIButton buttonWithType:UIButtonTypeContactAdd];
[leftButton setTitle:annotation.title forState:UIControlStateNormal];
[leftButton addTarget:self 
               action:@selector(zoomToLocation:) forControlEvents:UIControlEventTouchUpInside];
pinView.leftCalloutAccessoryView = leftButton;

UIImageView *profileIconView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"profile.png"]];
pinView.leftCalloutAccessoryView = profileIconView;
[profileIconView release];


return pinView;

}

うまくいけば、これが役に立ちます!!!!!!!!!

于 2012-04-19T12:34:35.547 に答える