Waarom heeft een aangepaste afbeelding MKMapView annotatie verdwijnen op touch?

Question

Waarom heeft een aangepaste afbeelding MKMapView annotatie verdwijnen op touch?

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6

Ik ben annoteren mijn kaart en het instellen van een afbeelding prima, maar toen ik de annotatie tik op de MapView, wordt de afbeelding afbeelding mijn gewoonte van terug naar de rode pen. Waarom is dit?

- (MKAnnotationView *)mapView:(MKMapView *)newMapView viewForAnnotation:(id )newAnnotation {
    MKPinAnnotationView *annotation = [[MKPinAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@currentloc];
    if (annotation == nil) {
        annotation = [[MKAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@currentloc];
    }

    annotation.image = [UIImage imageNamed:@anno.png];
    annotation.canShowCallout = YES;
    annotation.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@bus_stop_30x30.png]];
    annotation.leftCalloutAccessoryView = imgView;

    return annotation;
}

Mijn code ziet er identiek aan enkele voorbeelden van code die dit probleem niet te produceren.

iphone annotations mapkit

De vraag is gesteld op 26/11/2009 om 23:15
bron van user dc.

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3 antwoorden

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0

    Try this if you want to set both Source to Destination pin images different.

    MKPointAnnotation * sourceAnno= [[MKPointAnnotation alloc] init];
    sourceAnno.coordinate=CLLocationCoordinate2DMake(YourSourcelatitude,YourSourcelongitude);
    [sourceAnno setAccessibilityLabel:@“Source”];
    sourceAnno.title = @“You”;
    [mapview addAnnotation: sourceAnno];

    DestinationAnno = [[MKPointAnnotation alloc] init];
    DestinationAnno.coordinate = CLLocationCoordinate2DMake(YourDestinationlatitude,YourDestinationlongitude);
    [DestinationAnno setAccessibilityLabel:@“Destination”];
    DestinationAnno.title =@“Destination”;
    [mapview addAnnotation: DestinationAnno];

   In Delegate Method
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation 
{
    MKPointAnnotation *PointAnno=(MKPointAnnotation *)annotation;
    NSString * kPinAnnotationIdentifier = PointAnno.accessibilityLabel;
    MKAnnotationView *AnnotationView = [[MKAnnotationView alloc]initWithAnnotation:annotation    reuseIdentifier:kPinAnnotationIdentifier];

    if ([kPinAnnotationIdentifier isEqualToString:@"Source"]) 
   {
        AnnotationView.centerOffset = CGPointMake(8, -14);
        AnnotationView.calloutOffset = CGPointMake(-8, 0);
        AnnotationView.image = [UIImage imageNamed:@"pin_blue.png"];
        AnnotationView.canShowCallout = YES;
    }
    else if([kPinAnnotationIdentifier isEqualToString:@"Destination"])
    {
        AnnotationView.centerOffset = CGPointMake(8, -14);
        AnnotationView.calloutOffset = CGPointMake(-8, 0);
        AnnotationView.image = [UIImage imageNamed:@"pin_red.png"];
        AnnotationView.canShowCallout = YES;
    }
    return AnnotationView;
}

Dank je

antwoordde op 25/02/2015 om 13:14
bron van user jbchitaliya

stemmen

0

Ik denk dat dit een van de beste manieren:

(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>) annotation
{
    NSLog(@"welcome into the map view annotation");
    MyAnnotation* myAnnotation1=annotation;

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

    if([mapView isEqual:mapMainView]== NO)
    {
        return  nil;
    }
    // try to dequeue an existing pin view first
    //  if ([annotation isKindOfClass:[myAnnotation1 class]]) 
    //  {

    // try to dequeue an existing pin view first
    static NSString* AnnotationIdentifier = @"AnnotationIdentifier";

    MKPinAnnotationView* pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:AnnotationIdentifier];

    if (nil == pinView)
    {
        MKAnnotationView* annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation

        reuseIdentifier:AnnotationIdentifier] autorelease];
        // annotationView.canShowCallout = YES;
        // pinView.animatesDrop=YES;
        //pinView.pinColor=MKPinAnnotationColorPurple;

        //image
        UIImage* flagImage = [UIImage imageNamed:@"map_marker_over2.png"];

        CGRect resizeRect;

        resizeRect.size = flagImage.size;
        CGSize maxSize = CGRectInset(self.view.bounds,
        [MapPropertyViewController annotationPadding],
        [MapPropertyViewController annotationPadding]).size;
        maxSize.height -= self.navigationController.navigationBar.frame.size.height + [MapPropertyViewController calloutHeight];
        if (resizeRect.size.width > maxSize.width)
        resizeRect.size = CGSizeMake(maxSize.width, resizeRect.size.height /  resizeRect.size.width * maxSize.width);
        if (resizeRect.size.height > maxSize.height)
        resizeRect.size = CGSizeMake(resizeRect.size.width / resizeRect.size.height *  maxSize.height, maxSize.height);

        resizeRect.origin = (CGPoint){0.0f, 0.0f};
        UIGraphicsBeginImageContext(resizeRect.size);
        [flagImage drawInRect:resizeRect];
        UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        annotationView.image = resizedImage;
        annotationView.opaque = NO;

        UIButton* rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
        [rightButton setTitle:annotation.title forState:UIControlStateNormal];
        [rightButton addTarget:self
        action:@selector(showDetails:)
        forControlEvents:UIControlEventTouchUpInside];
        rightButton.tag = myAnnotation1.tagAnnotation;
        annotationView.rightCalloutAccessoryView = rightButton;

        profileIconView = [[UIImageView alloc]initWithFrame:CGRectMake(18.5f, 10.0f, 37.0f, 30.0f)];
        annotationView.leftCalloutAccessoryView = profileIconView;
        //image
        img = [UIImage imageWithData: [NSData dataWithContentsOfURL: [NSURL URLWithString:[arrImages objectAtIndex:myAnnotation1.tagAnnotation]]]];
        NSLog(@"Annotation Click %d",[arrImages count]);
        NSLog(@"image  %@",img);
        profileIconView.image=img;

        [profileIconView release];

        [annotationView setEnabled:YES];
        [annotationView setCanShowCallout:YES];
        return annotationView;
    }   
    return pinView;
    //  }
    //  return nil;
}

antwoordde op 16/11/2011 om 05:52
bron van user Tulasi Narayana Dumpala

dc. · Accepted Answer · 2009-11-26 23:38

Het beantwoorden van mijn eigen vraag hier, voor het geval anderen hebben hetzelfde probleem. Merk op dat ik gebruik "MKPinAnnotationView" - het moet worden gewijzigd in "MKAnnotationView" en alles werkt.

Vaste code:

- (MKAnnotationView *)mapView:(MKMapView *)newMapView viewForAnnotation:(id )newAnnotation {
    MKAnnotationView *annotation = [[MKAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@"currentloc"];

    if (annotation == nil) {
        annotation = [[MKAnnotationView alloc] initWithAnnotation:newAnnotation reuseIdentifier:@"currentloc"];
    }

    annotation.image = [UIImage imageNamed:@"anno.png"];
    annotation.canShowCallout = YES;
    annotation.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
    UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"bus_stop_30x30.png"]];
    annotation.leftCalloutAccessoryView = imgView;

    return annotation;
}