Jumping from a custom callout to another one in MKMap - iphone

Question

I've been following this tutorial to show custom annotation callout bubbles.
It works perfectly if you have only one annotation with a custom annotationview.
However, I need to have more on my map, and I have troubles switching from a custom annotationview to another one. If I click on another pin when having selected already one and would like to make appear the new custom annotationview, it doesn't work. I have first to click somewhere else random on the mapview. I guess I have something to work on in DidDeselect Method, but I'm not sure...
How would you solve such a problem?
- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view {
if (self.calloutAnnotation && [view.annotation isKindOfClass:[MyHomeAnnotation class]]) {
[self.mapView removeAnnotation: self.calloutAnnotation];
}
}
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
if ([view.annotation isKindOfClass:[MyHomeAnnotation class]]) {
if (self.calloutAnnotation == nil) {
self.calloutAnnotation = [[CalloutMapAnnotation alloc] initWithLatitude:view.annotation.coordinate.latitude
andLongitude:view.annotation.coordinate.longitude];
} else {
self.calloutAnnotation.latitude = view.annotation.coordinate.latitude;
self.calloutAnnotation.longitude = view.annotation.coordinate.longitude;
}
[self.mapView addAnnotation:self.calloutAnnotation];
self.selectedAnnotationView = view;
}
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {
if (annotation == self.calloutAnnotation) {
CalloutMapAnnotationView *calloutMapAnnotationView = (CalloutMapAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:#"CalloutAnnotation"];
if (!calloutMapAnnotationView) {
calloutMapAnnotationView = [[[CalloutMapAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:#"CalloutAnnotation"] autorelease];
calloutMapAnnotationView.contentHeight = 78.0f;
UIImage *asynchronyLogo = [UIImage imageNamed:#"cykelrød1.png"];
UIImageView *asynchronyLogoView = [[[UIImageView alloc] initWithImage:asynchronyLogo] autorelease];
asynchronyLogoView.frame = CGRectMake(5, 2, asynchronyLogoView.frame.size.width, asynchronyLogoView.frame.size.height);
[calloutMapAnnotationView.contentView addSubview:asynchronyLogoView];
}
calloutMapAnnotationView.parentAnnotationView = self.selectedAnnotationView;
calloutMapAnnotationView.mapView = self.mapView;
return calloutMapAnnotationView;
} else if ([annotation isKindOfClass:[MyHomeAnnotation class]]) {
MKPinAnnotationView *annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:#"CustomAnnotation"] autorelease];
annotationView.canShowCallout = NO;
annotationView.pinColor = MKPinAnnotationColorGreen;
return annotationView;
}else if ([annotation isKindOfClass:[MyMapAnnotation class]]) {
MKPinAnnotationView *annotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:#"NormalAnnotation"] autorelease];
annotationView.canShowCallout = YES;
annotationView.pinColor = MKPinAnnotationColorPurple;
return annotationView;
}
return nil;
}

Answer 1

Here are my solution, I use latitude and longitude to distinguish which callout should be remove from mapview. Hope this will be help.
- (void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view {
NSLog(#"didSelectAnnotationView:%f", view.annotation.coordinate.latitude);
if (self.calloutAnnotation == nil) {
CalloutMapAnnotation *tempCallout = [[CalloutMapAnnotation alloc]
initWithLatitude:view.annotation.coordinate.latitude
andLongitude:view.annotation.coordinate.longitude];
self.calloutAnnotation = tempCallout;
[tempCallout release];
} else {
//remove callout when callout already exist
[self.myMapView removeAnnotation: self.calloutAnnotation];
self.selectedAnnotationView = nil;
//reposition
self.calloutAnnotation.latitude = view.annotation.coordinate.latitude;
self.calloutAnnotation.longitude = view.annotation.coordinate.longitude;
}
[self.myMapView addAnnotation:self.calloutAnnotation];
self.selectedAnnotationView = view;
}
- (void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view {
NSLog(#"didDeselectAnnotationView:%f", view.annotation.coordinate.latitude);
//use the latitude and longitude to avoid remove twice
if (self.calloutAnnotation &&
self.selectedAnnotationView.annotation.coordinate.latitude == view.annotation.coordinate.latitude &&
self.selectedAnnotationView.annotation.coordinate.longitude == view.annotation.coordinate.longitude
) {
[self.myMapView removeAnnotation: self.calloutAnnotation];
self.selectedAnnotationView = nil;
self.calloutAnnotation.isAddtoMap = NO;
}
}