Set disclosure button on an Array of annotations - ios

Question

I can't figure out how to set a disclosure button on 1 group of annotations.
The annotations are separated in 3 kinds of Arrays.
NSMutableArray *category1 = [[NSMutableArray alloc]init];
NSMutableArray *category2 = [[NSMutableArray alloc]init];
NSMutableArray *category3 = [[NSMutableArray alloc]init];
I add the annotation objects in these arrays like this:
myAnn = [[Annotations alloc]init];
location.latitude = 52.381285;
location.longitude = 4.888740;
myAnn.coordinate = location;
myAnn.title = #"";
myAnn.subtitle = #"";
[category1 addObject:myAnn];
And put them in another array:
[self.locationArrays addObject:category1];
I use a segmented control to show the 3 groups on the map.
currentAnnotation is an integer to use the objectAtIndex.
-(IBAction)setMap:(id)sender
{
int newAnnotations = ((UISegmentedControl *) sender).selectedSegmentIndex;
if (newAnnotations != self.currentAnnotation)
{
[self.myMapView removeAnnotations:[self.locationArrays objectAtIndex:self.currentAnnotation]];
[self.myMapView addAnnotations:[self.locationArrays objectAtIndex:newAnnotations]];
self.currentAnnotation = newAnnotations;
[self.myMapView showAnnotations:[self.locationArrays objectAtIndex:newAnnotations] animated:YES];
}
}
My question is:
How do the objects, for example, in catergory1 get a disclosure button?
And how should I use it with the viewForAnnotation and calloutAccessoryControlTapped method, because I already included all the annotation with a left blue car accessory.
Update
ViewForAnnotation method:
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:#"MapVC"];
if (!annotationView)
{
annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:#"MapVC"];
annotationView.canShowCallout = YES;
if ([annotation isKindOfClass:[MKUserLocation class]] || annotation == myMapView.userLocation || annotation == locationManager)
{
return nil;
}
else
{
//Blauw Navigatie Auto...
UIImageView *carView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"Driving"]];
UIButton *blueView = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 44, 44+30)];
blueView.backgroundColor = [UIColor colorWithRed:0 green:0.5 blue:1 alpha:1];
carView.frame = CGRectMake(11, 14, carView.image.size.width, carView.image.size.height);
[blueView addSubview:carView];
annotationView.leftCalloutAccessoryView = blueView;
}
if ([annotation isKindOfClass:[Annotations class]])
{
Annotations *myRightAnn = (Annotations *)annotation;
if (myRightAnn.category == 1)
{
annotationView.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
}
else
{
annotationView.rightCalloutAccessoryView = nil;
}
}
}
return annotationView;
}

Answer 1

In your Annotations class (the one that seems to implement MKAnnotation), add a property named "category" (the name has nothing to do with "Objective-C Categories" -- it's just in reference to what you've called your three arrays: category1..3, use a different name if you like):
#interface Annotations : NSObject <MKAnnotation>
#property (nonatomic, assign) CLLocationCoordinate2D coordinate;
#property (nonatomic, copy) NSString *title;
#property (nonatomic, copy) NSString *subtitle;
#property (nonatomic, assign) int category; //<-- add this property
#end
Set the annotation's category property to 1, 2, 3, or whatever when creating the annotation:
myAnn = [[Annotations alloc]init];
location.latitude = 52.381285;
location.longitude = 4.888740;
myAnn.coordinate = location;
myAnn.title = #"";
myAnn.subtitle = #"";
myAnn.category = 1; //<-- set to 1 because adding to category1 array
[category1 addObject:myAnn];
Then in viewForAnnotation, check the annotation's category property and set the rightCalloutAccessoryView as needed (below is just a rough idea of the code):
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
if ([annotation isKindOfClass:[MKUserLocation class]]) {
return;
}
static NSString *reuseId = #"ann";
MKAnnotationView *av = [mapView dequeueReusable...
if (av == nil) {
av = [[MKAnnotationView alloc] initWithAnnotation...
av.image = ...
av.leftCalloutAccessoryView = ...
av.canShowCallout = YES;
//Set other properties here that will be
//the same for ALL annotations...
}
else {
av.annotation = annotation;
}
//Set rightCalloutAccessoryView based on annotation **AFTER**
//the dequeue/alloc+init...
if ([annotation isKindOfClass:[Annotations class]]) {
Annotations *myAnn = (Annotations *)annotation;
if (myAnn.category == 1) {
//set right view to button only for category 1...
av.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
}
else {
//no right view for any other categories...
av.rightCalloutAccessoryView = nil;
}
}
return av;
}
In calloutAccessoryControlTapped, check the annotation's class, cast it to Annotations and check the category if necessary and handle it as needed:
-(void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
if ([view.annotation isKindOfClass:[Annotations class]]) {
Annotations *myAnn = (Annotations *)view.annotation;
if (control == view.leftCalloutAccessoryView) {
//handle left control tap...
}
else
if (control == view.rightCalloutAccessoryView) {
//handle right control tap...
}
}
}