add multiple touches toggle to iOS.

templates/cpp-template-default/proj.ios_mac/ios/AppController.mm

@@ -55,6 +55,9 @@ static AppDelegate s_sharedApplication;
                                           sharegroup: nil
                                        multiSampling: NO
                                      numberOfSamples: 0 ];
+    
+    // Enable or disable multiple touches
+    [eaglView setMultipleTouchEnabled:NO];
 
     // Use RootViewController manage CCEAGLView 
     _viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];