Loading multiple sets of annotations onto map kit map

Question

im trying to show on a map two json files simulteniously. But there is the problem it gives me weird errors which I can't figure it out. So originaly there was

 - (void)viewDidLoad {
    [super viewDidLoad];
    NSMutableArray * annotations = [[NSMutableArray alloc] init];

    self.mapView.visibleMapRect = MKMapRectMake(135888858.533591, 92250098.902419, 190858.927912, 145995.678292);
    NSLog(@"Loading data…");
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
        NSData * JSONData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:self.seedFileName ofType:@"json"]];


        for (NSDictionary * annotationDictionary in [NSJSONSerialization JSONObjectWithData:JSONData options:kNilOptions error:NULL])
        {
            ADClusterableAnnotation * annotation = [[ADClusterableAnnotation alloc] initWithDictionary:annotationDictionary];
            [annotations addObject:annotation];
            [annotation release];
        }

     dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Building KD-Tree…");
            [self.mapView setAnnotations:annotations];
        });
    });

    [annotations release];
}

so i saw that i have two ViewControllers which holds the the seedfile this one is

#import "CDStreetlightsMapViewController.h"

@implementation CDStreetlightsMapViewController

- (NSString *)pictoName {
    return @"CDStreetlight.png";
}

- (NSString *)clusterPictoName {
    return @"CDStreetlightCluster.png";
}

- (NSString *)seedFileName {
    return @"CDStreetlights";
}
- (NSString *)seedFileName1 {
    return @"CDToilets";
}
@end

the other one is

#import "CDToiletsMapViewController.h"

@implementation CDToiletsMapViewController

- (NSString *)seedFileName {
    return @"CDToilets";
}

- (NSString *)pictoName {
    return @"CDToilet.png";
}

- (NSString *)clusterPictoName {
    return @"CDToiletCluster.png";
}

@end

The json files are named CDToilets and CDStreetlights... but i have a tab bar which holds Toilets and streetlights. But lets say i would like to display on the toilets viewController the streetlights and the toilets? thats my problem right know.. I tried this

- (void)viewDidLoad {
    [super viewDidLoad];
    NSMutableArray * annotations = [[NSMutableArray alloc] init];

    self.mapView.visibleMapRect = MKMapRectMake(135888858.533591, 92250098.902419, 190858.927912, 145995.678292);
    NSLog(@"Loading data…");

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
        NSData * JSONData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:self.seedFileName ofType:@"json"]];


        for (NSDictionary * annotationDictionary in [NSJSONSerialization JSONObjectWithData:JSONData options:kNilOptions error:NULL])
        {
            ADClusterableAnnotation * annotation = [[ADClusterableAnnotation alloc] initWithDictionary:annotationDictionary];
            [annotations addObject:annotation];
            [annotation release];
        }

        NSData * JSONData1 = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:self.seedFileName1 ofType:@"json"]];


        for (NSDictionary * annotationDictionary in [NSJSONSerialization JSONObjectWithData:JSONData1 options:kNilOptions error:NULL])
        {
            ADClusterableAnnotation * annotation = [[ADClusterableAnnotation alloc] initWithDictionary:annotationDictionary];
            [annotations addObject:annotation];
            [annotation release];
        }

        dispatch_async(dispatch_get_main_queue(), ^{
            NSLog(@"Building KD-Tree…");
            [self.mapView setAnnotations:annotations];
        });
    });

    [annotations release];   
}

i renamed in the CDStreetlightsMapViewController the seedfile as seedfile1 so i can use it two times in viewDidLoad it didn't show errors but it didn't run well on simulator and I get an exception:

ClusterDemo[11014:c07]Loading data…
ClusterDemo[11014:1303]***Assertion failure in -[CDToiletsMapViewController seedFileName1], ADClusterMapView-master-7/ClusterDemo/Classes/CDMapViewController.‌​m:86 2013-11-25 23:59:37.524
ClusterDemo[11014:1303]***Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'This abstract method must be overridden!' *** First throw call stack: (0x18b2012 0x1277e7e 0x18b1e78 0xd0df35 0x3fad 0x36cb 0x2deb53f 0x2dfd014 0x2dee2e8 0x2dee450 0x99843e72 0x9982bdaa) libc++abi.dylib: terminate called throwing an exception (lldb) 

you can download the full app here... https://github.com/applidium/ADClusterMapView

Answer 1

If you read the exception it's quite clear that you're using an abstract method that contains an assertion to ensure that you know you've made a mistake. You need to implement the seedFileName1 method in CDToiletsMapViewController (just like you did in CDStreetlightsMapViewController).

From the code I guess you need to add:

- (NSString *)seedFileName1 {
    return @"CDStreetlights";
}