StackOverflow2013

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POAdding annotations in order -but map view does not return annotation in same order
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copied!<p>I add my annotations as follows:</p> <pre><code> [mapView addAnnotations:annotationArray]; </code></pre> <p>then I want to access each and individual annotations on the mapView as follows:</p> <pre><code>for (id<MKAnnotation> ann in mapView.annotations) </code></pre> <p>the problem is annotations on map view is not added in a way linked list. That is why it is not returning in same order that I add annotations to annotationsArray.</p> <p>to illustrate:, </p> <pre><code> [annotationArray addObject: annotation1]; [annotationArray addObject: annotation2]; [annotationArray addObject: annotation3]; [mapView addAnnotations:annotationArray]; for (id<MKAnnotation> ann in mapView.annotations) { //not returning in same order as added above// } </code></pre> <p>Is there a bug in mapView annotation?</p> <p>original code:</p> <pre><code> NSMutableArray *attrArray=[[NSMutableArray alloc]init]; for (NSArray *row in latt) { NSNumber *attr=[row valueForKey:@"attr"]; NSNumber *attr2=[attr valueForKey:@"ozone_level"]; NSLog(@"values:%@",attr2); NSNumber *comp=[NSNumber numberWithInt:-1]; if(attr2!=comp) { if([attrArray count]==0) {attrArray=[[NSMutableArray alloc]initWithObjects:attr2, nil]; } else { [attrArray addObject:attr2]; } NSNumber *latt2=[row valueForKey:@"lat"]; NSNumber *longt2=[row valueForKey:@"lng"]; CLLocationCoordinate2D coordinate; coordinate.latitude=latt2.doubleValue; coordinate.longitude=longt2.doubleValue; if(test<5) { Annotation *annotation = [[Annotation alloc] init]; annotation.coordinate = coordinate; annotation.title = [attr2 stringValue]; int colorvalue=[attr2 intValue]; pinColor = [self colorForAcceleration2:colorvalue]; annotation.color = pinColor; if([annotationArray count]==0) { annotationArray=[[NSMutableArray alloc]initWithObjects:annotation,nil]; // NSMutableArray *ad =[[NSMutableArray alloc]init]; } else { [annotationArray addObject:annotation]; } } test++; }//if attr2 }//for if( test == 5) { [mapView addAnnotations:annotationArray]; } if(test>=5) { //for (id<MKAnnotation> ann in mapView.annotations) for(int i=0;i<5;i++) { //Annotation *a = (Annotation *)ann; Annotation *a = ((Annotation*)[annotationArray objectAtIndex:i]); //((Annotation *)mapView.annotations). NSLog(@"%@",((Annotation*)[annotationArray objectAtIndex:i]).title); NSLog(@"%@",[attrArray objectAtIndex:i]); //NSLog(@"annotation array size:%d",[annotationArray count]); // NSLog(@"attr array size:%d",[attrArray count]); if([((Annotation*)[annotationArray objectAtIndex:i]).title isEqualToString:[[attrArray objectAtIndex:i] stringValue]]) { } else{ MKAnnotationView *av1=[mapView viewForAnnotation:((Annotation*)[annotationArray objectAtIndex:i])]; a.title=[NSString stringWithFormat:[[attrArray objectAtIndex:i] stringValue]]; int colorvalue=[[attrArray objectAtIndex:i] intValue]; pinColor = [self colorForAcceleration2:colorvalue]; a.color=pinColor; av1.image=[ZSPinAnnotation pinAnnotationWithColor:a.color]; av1.annotation=a;}//else }//for }//if </code></pre>

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