[ios] Correctly release Outlets and add missing calls to [super …] for some overloads

iphone/Maps/Classes/MapViewController.mm

@@ -301,8 +301,15 @@ NSInteger compareAddress(id l, id r, void * context)
 
 - (void)didReceiveMemoryWarning
 {
-  [super didReceiveMemoryWarning];
 	m_framework->MemoryWarning();
+  [super didReceiveMemoryWarning];
+}
+
+- (void)viewDidUnload
+{
+  // to correctly release view on memory warnings
+  self.m_myPositionButton = nil;
+  [super viewDidUnload];
 }
 
 - (void) didRotateFromInterfaceOrientation: (UIInterfaceOrientation) fromInterfaceOrientation
@@ -354,6 +361,7 @@ NSInteger compareAddress(id l, id r, void * context)
   m_mapIsVisible = true;
   [self Invalidate];
   [self.navigationController setNavigationBarHidden:YES animated:YES];
+  [super viewWillAppear:animated];
 }
 
 - (void)viewWillDisappear:(BOOL)animated
@@ -361,6 +369,7 @@ NSInteger compareAddress(id l, id r, void * context)
   m_mapIsVisible = false;
   m_framework->SetUpdatesEnabled(false);
   [self.navigationController setNavigationBarHidden:NO animated:YES];
+  [super viewWillDisappear:animated];
 }
 
 @end

iphone/Maps/Classes/SearchVC.mm

@@ -104,6 +104,11 @@ static void OnSearchResultCallback(search::Result const & res, int queryId)
     [m_locationManager stopUpdatingHeading];
   [m_locationManager stopUpdatingLocation];
   g_searchVC = nil;
+  // to correctly free memory
+  self.m_searchBar = nil;
+  self.m_table = nil;
+  m_results.clear();
+  [super viewDidUnload];
 }
 
 - (void)fixHeadingOrientation
@@ -116,12 +121,14 @@ static void OnSearchResultCallback(search::Result const & res, int queryId)
   [self fixHeadingOrientation];
   // show keyboard
   [m_searchBar becomeFirstResponder];
+  [super viewWillAppear:animated];
 }
 
 - (void)viewWillDisappear:(BOOL)animated
 {
   // hide keyboard immediately
   [m_searchBar resignFirstResponder];
+  [super viewWillDisappear:animated];
 }
 
 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation