I am getting some image url from web server, which I need to display on mapview. I have added function for MKAnnotationView
and parsed the url, however its not showing on map view. Below is my code. Please let me know, if I am doing anything wrong.
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *identifier = @"CustomAnnotation";
MKAnnotationView* annView = nil;
if ([annotation isKindOfClass:[MapViewAnnotation class]]) {
annView = (MKAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (annView == nil) {
annView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
} else {
annView.annotation = annotation;
}
for(int i=0;i<array.count;i++) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSURL *iconurl = [NSURL URLWithString:[[array objectAtIndex:i]valueForKey:@"icon"]];
UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:iconurl]];
dispatch_async(dispatch_get_main_queue(), ^ {
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
[annView addSubview:imageView];
[annView setFrame:CGRectMake(0, 0, imageView.frame.size.width, imageView.frame.size.height)];
});
});
}
UIButton*accessory = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
[accessory addTarget:self action:@selector(openDetail:) forControlEvents:UIControlEventTouchUpInside];
[accessory setFrame:CGRectMake(0, 0, 30, 30)];
[annView setRightCalloutAccessoryView:accessory];
}
[annView setEnabled:YES];
[annView setCanShowCallout:YES];
return annView;
}
First, make sure you've specified the delegate of the map view and confirm that your viewForAnnotation
is getting called at all.
Second, you're adding the UIImageView
as a subview of the MKAnnotationView
. Generally you just set the image
property of the MKAnnotationView
itself.