MMDrawerController instantiation - ios

Question

I'm trying to use the MMDrawerController in my app. I've downloaded the source and the dependencies. This is the code that I've added to the AppDelegate.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIViewController * leftDrawer = [[UIViewController alloc] init];
UIViewController * center = [[UIViewController alloc] init];
UIViewController * rightDrawer = [[UIViewController alloc] init];
MMDrawerController * drawerController = [[MMDrawerController alloc]
initWithCenterViewController:center
leftDrawerViewController:leftDrawer
rightDrawerViewController:rightDrawer];
UINavigationController * navigationController = [[UINavigationController alloc] initWithRootViewController:center];
[navigationController setRestorationIdentifier:#"MMExampleCenterNavigationControllerRestorationKey"];
[self.drawerController setRestorationIdentifier:#"MMDrawer"];
[self.drawerController setMaximumRightDrawerWidth:200.0];
[self.drawerController setOpenDrawerGestureModeMask:MMOpenDrawerGestureModeAll];
[self.drawerController setCloseDrawerGestureModeMask:MMCloseDrawerGestureModeAll];
[self.drawerController
setDrawerVisualStateBlock:^(MMDrawerController *drawerController, MMDrawerSide drawerSide, CGFloat percentVisible) {
UIViewController * sideDrawerViewController;
if(drawerSide == MMDrawerSideLeft){
sideDrawerViewController = drawerController.leftDrawerViewController;
}
else if(drawerSide == MMDrawerSideRight){
sideDrawerViewController = drawerController.rightDrawerViewController;
}
[sideDrawerViewController.view setAlpha:percentVisible];
}];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setRootViewController:self.drawerController];
return YES;
}
However the app runs to a blank screen.What am I missing?

Answer 1

UINavigationController * navigationController =
[[UINavigationController alloc] initWithRootViewController:drawerController];
[self.window setRootViewController:navigationController];
and no need to write below line:
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
Hope this will perfectly work.

Answer 2

Replace the line of code before return with the following
[self.window setRootViewController:navigationController];

Answer 3

Your problem is that you are setting the center, right and left views with UIViewController and also these UIViewControllers settings are not defined
in order to integrate the MMDrawerController right do the following.
In order to gurantee having views initialized you can use this code to get the UIViewControllers created in your storyboard
UIStoryboard *storyboard;
storyboard = [UIStoryboard storyboardWithName:"Story board name" bundle:nil];
UIViewController * leftSideNavController =
[storyboard instantiateViewControllerWithIdentifier:
"Left side view identifier"];
UIViewController * centerSideNavController =
[storyboard instantiateViewControllerWithIdentifier:
"center view identifier"];
UIViewController * rightSideNavController =
[storyboard instantiateViewControllerWithIdentifier:
"right side view identifier"];
then using the UIViewControllers you got from the previous point initialize the MMDrawerController
self.drawerController =
[[MMDrawerController alloc]
initWithCenterViewController:centerSideNavController
leftDrawerViewController:leftSideNavController
rightDrawerViewController:rightSideNavController];