Map Callout Only on Some Annotations

[spiderguy84]

I am trying to set up my MapView so that only some of the Pin Views will show CallOut Button. for my map view controller Maps.h I have:

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
@class DetailView;
@interface Maps : UIViewController <MKMapViewDelegate> {
    DetailView *_detailView;
    IBOutlet MKMapView *mapView;
    NSMutableArray *annotations;
}
@property (nonatomic, retain) IBOutlet MKMapView *mapView;
@property (nonatomic, retain) NSMutableArray *annotations;
@property (retain) DetailView *detailView;
@end

The Maps.m

#import "Maps.h"
#import "DisplayMap.h"
#import "DetailView.h"
@implementation Maps
@synthesize annotations;
@synthesize detailView = _detailView;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {

    }
    return self;
}

- (void)didReceiveMemoryWarning
{

    [super didReceiveMemoryWarning];
    

}

#pragma mark - View lifecycle


- (void)viewDidLoad {
    [super viewDidLoad];
    
    [mapView setMapType:MKMapTypeSatellite];
    [mapView setZoomEnabled:YES];
    [mapView setScrollEnabled:YES];
    mapView.delegate = self;
    MKCoordinateRegion region = { {0.0, 0.0 }, { 0.0, 0.0 } };
    region.center.latitude = 32.385325 ;
    region.center.longitude = -86.217442;
    region.span.longitudeDelta = 0.005f;
    region.span.latitudeDelta = 0.005f;
    [mapView setRegion:region animated:YES];
    CLLocationCoordinate2D theCoordinate;
    self.annotations=[[NSMutableArray alloc] init];
    //the first annotation
    theCoordinate.latitude = 32.388152;
    theCoordinate.longitude = -86.216948;
    CLLocationCoordinate2D law;
    
    //the first annotation
    law.latitude = 32.383024;
    law.longitude = -86.214974;

    CLLocationCoordinate2D rotunda;
    
    //the first annotation
    rotunda.latitude = 32.384129;
    rotunda.longitude = -86.216476;
    
    CLLocationCoordinate2D margaret;
    
    //the first annotation
    margaret.latitude = 32.382363;
    margaret.longitude = -86.220682;
    
   


    [mapView setDelegate:self];
    
    DisplayMap *ann = [[DisplayMap alloc] init];
    ann.title = @"Tennis Courts";
    ann.subtitle = @"";
    ann.coordinate = region.center;
    [mapView addAnnotation:ann];
    DisplayMap *ann1 = [[DisplayMap alloc] init];
    ann1.title = @"Harrison Field";
    ann1.subtitle = @"Baseball";
    ann1.coordinate = theCoordinate;
    [mapView addAnnotation:ann1];
    DisplayMap *ann2 = [[DisplayMap alloc] init];
    ann2.title = @"Thomas Goode Jones School of Law";
    ann2.subtitle = @"Marjorie Snook Building";
    ann2.coordinate = law;
    [mapView addAnnotation:ann2];
    DisplayMap *ann3 = [[DisplayMap alloc] init];
    ann3.title = @"E.L. Collum Rotunda";
    ann3.subtitle = @"";
    ann3.coordinate = rotunda;
    [mapView addAnnotation:ann3];
    DisplayMap *ann4 = [[DisplayMap alloc] init];
    ann4.title = @"Margaret Harris";
    ann4.subtitle = @"Women's Residence Hall";
    ann4.coordinate = margaret;
    [mapView addAnnotation:ann4];
  
        [annotations addObject:ann3];
	[annotations addObject:ann4];
    [annotations addObject:ann2];
	[annotations addObject:ann1];
	[annotations addObject:ann];
   
}

-(MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:
(id <MKAnnotation>)annotation {
    MKPinAnnotationView *pinView = nil;
    if(annotation != mapView.userLocation)
    {
        static NSString *defaultPinID = @"com.invasivecode.pin";
        pinView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID];
        if ( pinView == nil ) pinView = [[[MKPinAnnotationView alloc]
                                          initWithAnnotation:annotation reuseIdentifier:defaultPinID] autorelease];
                    pinView.pinColor = MKPinAnnotationColorRed;
            pinView.canShowCallout = YES;
            pinView.animatesDrop = YES;
            UIButton *detailButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
            [detailButton setTitle:annotation.title forState:UIControlStateNormal];
            NSInteger annotationValue = [self.annotations indexOfObject:annotation];
            
            detailButton.tag = annotationValue;
            
            [detailButton addTarget:self action:@selector(showDetailView:) forControlEvents:UIControlEventTouchUpInside];
            
            pinView.rightCalloutAccessoryView = detailButton;
            return pinView;

        
            }
    else {
        [mapView.userLocation setTitle:@"I am here"];
    }
    return pinView;
}
-(IBAction)showDetailView:(UIView*)sender {
    NSString *where = ((UIButton*)sender).currentTitle;
    
    DetailView *nextController = [[DetailView alloc] initWithNibName:@"DetailView" bundle:nil];
        

    [self presentModalViewController:nextController animated:YES];
    [nextController changeProductText:where]; 

     
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}



@end

I have tried adding an NSString *callitem to the NSObject 'DisplayMaps' .h file, and then on the annotations, calling like this:

ann.callitem = @"LetCall";

and in the viewForAnnotation, changing to:

if (annotations.callitem isEqualToString:@"LetCall" {
...
}

However, I get the error Property for callitem not found on NSMutableArray.
Am I going about this the right way, or is there an easier (Or at least better way) to only allow some annotations to show callout?

[timle8n1]

You are calling callitem on annotations which is your array not on annotation - which is the annotation to provide the view for. While you are guarding against the current location annotation you should probably make sure the annotation has the callitem method by checking for that selector or checking the class is your expected class.