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POReusing custom drawn annotation view
 

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  1. POReusing custom drawn annotation view
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    <p>I've managed to draw numbers inside custom colored circle annotations (based on <a href="https://stackoverflow.com/questions/7825220/draw-text-in-circle-overlay">this</a>). I want to make some optimizations for my custom annotation class and I read about reusing. My problem is if I make the stuff reusable, the annotation views get mixed on map which is a big problem. The custom drawn annotation views cannot be reused ? Or is it somehow related to the view's annotaion ? I mean, the annotation stores the number to be drawn on its view, practically it's a 1to1 relationship between annotation and its view. </p> <p>Here is my relevant code : Custom annotationview's init : </p> <pre><code>-(id)initWithAnnotation:(id&lt;MKAnnotation&gt;)annotation reuseIdentifier:(NSString *)reuseIdentifier imageType:(int)imageType { self = [super initWithAnnotation: annotation reuseIdentifier: reuseIdentifier]; if (self != nil) { if ([annotation isKindOfClass:[CircleMarker class]]) { // custom annotation class with some extra fields CircleMarker * clm = (CircleMarker * )annotation; self.locationMarker = clm; // ... setting frame and other stuff self.image = [self getImage]; /* this method DRAWS image based on clm */ self.canShowCallout = NO; } ... } </code></pre> <p>And the delegate : </p> <pre><code>- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id &lt;MKAnnotation&gt;)annotation{ static NSString *reuseId_small = @"smallcircle"; static NSString *reuseId_big = @"bigcircle"; CircleAnnotationView * nca = nil; if ((int)[self.mapView getZoomLevel] &lt; ZOOM_LEVEL_FOR_NUMBERS) { nca = (CircleAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:reuseId_small]; if (nca == nil ) nca = [[[CircleAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseId_small imageType:2] autorelease]; } else { nca = (CircleAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:reuseId_big]; if ( nca == nil ) nca = [[[CircleAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseId_big imageType:1] autorelease]; } return nca; } </code></pre> <p>I've tried to replace the <code>self.image =</code> part with a custom <code>drawRect</code> function, but the result was the same.</p> <p>Thanks.</p>
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    1. COOr, in these cases only the colored circles (the circle's background) can be reused and I should separate the drawn number from the background ?
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