放大Mapview在iOS6上崩溃应用

我正在使用mapview。当我放大地图时，它显示确实收到了内存警告，并在iOS 6设备中崩溃了应用程序，但它在以下版本中工作正常。其采取更多的内存，当我放大，但其没有得到释放如何释放它，我haved释放的释放方法中的所有对象，但它仍然显示相同确实收到内存警告和崩溃的应用程序我的代码是放大Mapview在iOS6上崩溃应用

 mapView = [[MKMapView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height)]; 
    mapView.showsUserLocation = YES; 
    [mapView setDelegate:self]; 
    [self addSubview:mapView]; 
    routeView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, mapView.frame.size.width, mapView.frame.size.height)]; 
    routeView.userInteractionEnabled = NO; 
    [mapView addSubview:routeView]; 

     - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation 
    { 
     if([annotation isKindOfClass:[TurnAnnotation class]]) 
{ 
    MKAnnotationView *turnAnnotationView=[[MKAnnotationView alloc]initWithAnnotation:annotation reuseIdentifier:nil] ; 
    turnAnnotationView.image=[UIImage imageNamed:@"TurnAnnotation1.png"]; 

    turnAnnotationView.canShowCallout=NO; 
    return turnAnnotationView; 
} 
else if([annotation isKindOfClass:[PlaceMark class]]) 
{ 
    MKPinAnnotationView *newAnnotation = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:nil]; 

    if (isdefault==YES) { 
     if(!appDel.appBOOL){ 
      newAnnotation.pinColor = MKPinAnnotationColorGreen; 
      appDel.appBOOL = YES; 
     }else { 
      newAnnotation.pinColor = MKPinAnnotationColorRed; 
      appDel.appBOOL = NO; 
     } 
    }else{ 


    if(!appDel.appBOOL){ 
     newAnnotation.pinColor = MKPinAnnotationColorRed; 
     appDel.appBOOL = YES; 
    }else { 
     newAnnotation.pinColor = MKPinAnnotationColorGreen; 
     appDel.appBOOL = NO; 
    } 
    } 

    newAnnotation.canShowCallout = YES; 

    return newAnnotation; 
} 
return nil;

}

来源

2013-06-13 user2230971