How to start Tracking POIs with Skobbler

This is my code for creating trackable POIs and starting a POI tracking.

This code is placed just before I would calculate a route and start navigation

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  • -(void)createTrackablePOIs
    {
    
    // Go through the route array and create POIs out of all added exits and locations
    if ([Constants shared].routeArray.count>2){
    
        _trackablePOIs = [[NSMutableArray alloc] init];
    
        for (int i=1; i<[Constants shared].routeArray.count-1; i++) {
            if ([[Constants shared].routeArray[i] isKindOfClass:[Exit class]]){
                Exit *e = [Constants shared].routeArray[i];
                SKTrackablePOI* poi = [[SKTrackablePOI alloc] init];
                poi.poiID = e.idExit;
                poi.type = 1;
                poi.coordinate = CLLocationCoordinate2DMake(e.lat, e.lon);
                [self.trackablePOIs addObject:poi];
    
            }else{
                RoutePoint* rp = [Constants shared].routeArray[i];
                SKTrackablePOI *poi = [[SKTrackablePOI alloc] init];
                poi.poiID = rp.pointID;
                poi.type = 2;
                poi.coordinate = CLLocationCoordinate2DMake(rp.x,rp.y);
                [self.trackablePOIs addObject:poi];
            }
        }
    
        NSLog(@"%d POIs created and added to array",_trackablePOIs.count);
    
        self.poiTracker = [[SKPOITracker alloc] init];
        self.poiTracker.dataSource = self;
        self.poiTracker.delegate = self;
    
        // Create POI Tracking rules
        SKTrackablePOIRule *rule = [SKTrackablePOIRule trackablePOIRule];
        rule.routeDistance = 5000;
        rule.aerialDistance = 5000;
        [_poiTracker setRule:rule forPOIType:1];
    
    
        // Start POI tracking
        [_poiTracker startPOITrackerWithRadius:5000 refreshMargin:0.1 forPOITypes:@[@1,@2]];
    }
    
    
    
    }
    
    -(NSArray*)poiTracker:(SKPOITracker *)poiTracker trackablePOIsAroundLocation:(CLLocationCoordinate2D)location inRadius:(int)radius withType:(int)poiType
    {
    return [self.trackablePOIs copy];
    }
    
    - (void)poiTracker:(SKPOITracker *)poiTracker didDectectPOIs:(NSArray *)detectedPOIs{
    [detectedPOIs enumerateObjectsUsingBlock:^(SKDetectedPOI *detectedPOI,     NSUInteger index, BOOL *stop){
        NSLog(@"Detected: %@",[detectedPOI description]);
    }];
    NSLog(@"POI detected");
    }
    

    But POI delegate method is never called. No matter how much I played with trackable POI rules.

    Also, another question, what exactly does the margin stands for in

    [_poiTracker startPOITrackerWithRadius:5000 refreshMargin:0.1 forPOITypes:@[@1,@2]];