title: While using MKMapview causing MBs of memory usage and using ARC it not releasing memory when View Disappears
body: <p>using Xcode 6.0 and iOS 8.4 and what i have tried is:</p>
  
  <pre><code>-(void)viewWillDisappear:(BOOL)animated {
      [super viewWillDisappear:animated];
  
      mapView.mapType = MKMapTypeHybrid;
      mapView.mapType = MKMapTypeStandard;
      mapView.showsUserLocation = NO;
      mapView.delegate = nil;
      [mapView removeFromSuperview];
      mapView = nil;
  }
  </code></pre>
  
  <p>I am using ARC, it not releasing memory when View Disappears.</p>