[IPHONE] closing model caches on handling EnterBackground.

iphone/Maps/Classes/MapViewController.h

@@ -42,6 +42,7 @@ withConfidenceRadius: (double) confidenceRadius
 
 // called when app is terminated by system
 - (void) OnTerminate;
+- (void) OnEnterForeground;
 - (void) OnEnterBackground;
 
 - (void) Invalidate;

iphone/Maps/Classes/MapViewController.mm

@@ -312,7 +312,8 @@ NSInteger compareAddress(UITouch * l, UITouch * r, void * context)
 
 - (void) OnTerminate
 {
-	[self OnEnterBackground];
+  if (m_framework)
+    m_framework->SaveState();
 }
 
 - (void) Invalidate
@@ -328,7 +329,19 @@ NSInteger compareAddress(UITouch * l, UITouch * r, void * context)
 {
 	if (m_framework)
   {	// save world rect for next launch
-  	m_framework->SaveState();
+  	m_framework->SetUpdatesEnabled(false);
+    m_framework->SaveState();
+    m_framework->EnterBackground();
+  }
+}
+
+- (void) OnEnterForeground
+{
+  if (m_framework)
+  {
+    m_framework->EnterForeground();
+    if (!m_framework->SetUpdatesEnabled(true))
+      m_framework->Invalidate();
   }
 }
 

iphone/Maps/Classes/MapsAppDelegate.mm

@@ -24,6 +24,11 @@
 	[mapViewController OnEnterBackground];
 }
 
+- (void) applicationWillEnterForeground: (UIApplication *) application
+{
+  [mapViewController OnEnterForeground];
+}
+
 - (void) applicationDidFinishLaunching: (UIApplication *) application
 {
   // Add the tab bar controller's current view as a subview of the window

map/framework.hpp

@@ -456,38 +456,41 @@ public:
 
   void MemoryWarning()
   {
+    // clearing caches on memory warning.
     m_model.ClearCaches();
-    m_informationDisplay.memoryWarning();
+    LOG(LINFO, ("MemoryWarning"));
+/*    m_informationDisplay.memoryWarning();
     m_renderQueue.memoryWarning();
 
     if (m_windowHandle)
       m_windowHandle->drawer()->screen()->memoryWarning();
 
     if (m_resourceManager)
-      m_resourceManager->memoryWarning();
+      m_resourceManager->memoryWarning();*/
   }
 
   void EnterBackground()
   {
+    // clearing caches on entering background.
     m_model.ClearCaches();
-    m_renderQueue.enterBackground();
+/*    m_renderQueue.enterBackground();
 
     if (m_windowHandle)
       m_windowHandle->drawer()->screen()->enterBackground();
 
     if (m_resourceManager)
-      m_resourceManager->enterBackground();
+      m_resourceManager->enterBackground();*/
   }
 
   void EnterForeground()
   {
-    if (m_resourceManager)
+/*    if (m_resourceManager)
       m_resourceManager->enterForeground();
 
     if (m_windowHandle)
       m_windowHandle->drawer()->screen()->enterForeground();
 
-    m_renderQueue.enterForeground();
+    m_renderQueue.enterForeground();*/
   }
 
   void CenterViewport()