Mmdrawercontroller first loading sidebar height problem

introduction ： When in CenterControl Slide into the sidebar   The height of the sidebar is wrong when loading for the first time   Because my sidebar adds a navigation bar   The height will rise first and then return to the original   Only App Starting is the first time you click the button to slide sideways, which will cause this problem   But this problem does not occur when side sliding is combined with animation

test : iPhoneSE2 generation     The height of the sidebar loaded for the first time is 623  Not the first time 603( normal )  

         iPhone11   The height of the sidebar loaded for the first time is 852  Not the first time 808( normal )  

 

Solution and sideslip code

        HomeViewController *home = [[HomeViewController alloc]init];

        LeftMenuController *left = [[LeftMenuController alloc]init];

        UINavigationController *centerNvaVC = [[UINavigationController alloc]initWithRootViewController:home];

        UINavigationController *leftNavVC = [[UINavigationController alloc]initWithRootViewController:left];

        self.drawerController = [[MMDrawerController alloc] initWithCenterViewController:centerNvaVC leftDrawerViewController:leftNavVC];

        [self.drawerController setShowsShadow:NO];

        //4、 Settings on / Gesture of closing drawer

        self.drawerController.openDrawerGestureModeMask  = MMOpenDrawerGestureModeNone;

        self.drawerController.closeDrawerGestureModeMask = MMCloseDrawerGestureModeNone;

        //5、 Set the number of drawers on the left and right

        self.drawerController.maximumLeftDrawerWidth = KScreenW;

// I solve problems here

        [self.drawerController bouncePreviewForDrawerSide:(MMDrawerSideLeft) completion:nil];

        [self.window setRootViewController:self.drawerController];

 

Enter the method I wrote above   hold 645-660 Just block the animation code of   It should also be possible to call the two methods on the shielding code