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POMaximum number of annotations (MKAnnotation) that can be drawn on MKMapView?
 

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  1. POMaximum number of annotations (MKAnnotation) that can be drawn on MKMapView?
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    <p>I want to add a number of annotations(arround 500) on a mapview but the maximum it seems to display is 100. If I go beyond 100, <strong>viewForAnnotation</strong> delegate method is not called. However it works perfectly for annotations below 100.</p> <p>here is the code: (works only when count of <strong>annotationArray</strong> array is less than 101)</p> <pre><code>_allPoints = [[NSMutableArray alloc] init]; NSString* responseFile = [[NSBundle mainBundle] pathForResource:@"Datafile" ofType:@"txt"]; NSData *sampleData = [NSData dataWithContentsOfFile:responseFile]; if (sampleData) { NSError* error; NSDictionary* json = [NSJSONSerialization JSONObjectWithData:sampleData options:kNilOptions error:&amp;error]; NSArray* response = [json objectForKey:@"response"]; for (NSDictionary *lineDict in response) { if ([[lineDict objectForKey:@"data"] isKindOfClass:[NSArray class]]) { SinglePoint *singlePoint = [[SinglePoint alloc] initWithDictionary:lineDict]; [_allPoints addObject:singlePoint]; } else { NSLog(@"Error"); } } } _mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)]; [_mapView setDelegate:self]; [self.view addSubview:_mapView]; NSMutableArray *annotationArray = [[NSMutableArray alloc] init]; for (int i=0; i&lt;[_allPoints count]; i++) { SinglePoint *singlePoint = [_allPoints objectAtIndex:i]; NVPolylineAnnotation *annotation = [[NVPolylineAnnotation alloc] initWithPoint:singlePoint mapView:_mapView]; [annotationArray addObject:annotation]; } [_mapView addAnnotations:(NSArray *)annotationArray]; CLLocationCoordinate2D centerCoord = { 28.632747, 77.219982 }; [_mapView setCenterCoordinate:centerCoord zoomLevel:12 animated:NO]; </code></pre> <p>The delegate method is:</p> <p><strong>EDIT:</strong> As per comments, started reusing the view but with no luck :(</p> <pre><code>if ([annotation isKindOfClass:[NVPolylineAnnotation class]]) { static NSString *viewIdentifier = @"annotationView"; NVPolylineAnnotationView *annotationView = (NVPolylineAnnotationView *) [mapView dequeueReusableAnnotationViewWithIdentifier:viewIdentifier]; if (annotationView == nil) { annotationView = [[NVPolylineAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:viewIdentifier mapView:_mapView]; } return annotationView; } return nil; </code></pre> <p>I could not find any restriction in the documentation or anywhere else. Could it be memory issue?</p>
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    1. COWhat happens if you add the first object in `allPoints` 500 times to your `annotationArray`?
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    2. COIs it possible to provide the source code for `NVPolylineAnnotation`?
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