I myself got the answer.In order to enable multitouch just go to your AppController.mm then in the function didFinishLaunchingWithOptions after creating the EAGL View just add the following code.
[__glView setMultipleTouchEnabled:YES];
So now the function should look like this
(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary
*)launchOptions {
window = [[UIWindow alloc] initWithFrame: [[UIScreen mainScreen] bounds]];
EAGLView *__glView = [EAGLView viewWithFrame: [window bounds]
pixelFormat: kEAGLColorFormatRGBA8
depthFormat: GL_DEPTH_COMPONENT16
preserveBackbuffer: NO
sharegroup: nil
multiSampling: NO
numberOfSamples:0 ];
[__glView setMultipleTouchEnabled:YES];
viewController = [[RootViewController alloc] initWithNibName:nil bundle:nil];
viewController.wantsFullScreenLayout = YES;
viewController.view = __glView;