title: How to free up memory on viewwilldisappear MKMapView?
body: <p>Hello everyone I have a MKMapView in my uiviewcontroller. When i open the uiview the memory heap rises from 20 Mb to 100 Mb. And on viewwilldisappear i have added the following:</p>
  
  <pre><code>-(void)viewWillDisappear:(BOOL)animated{
       [self.mapView release];
  }
  </code></pre>
  
  <p>But the memory stays the same. Its does not decrease.</p>