ios - JASidePanel 的屏幕黑屏问题

Question

我试图将JASidePanel集成到我的应用程序中。下面是我初始化 JSSidePanel 控制器的代码。

- (void)viewDidLoad {
    [super viewDidLoad];
    UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main"
                                                         bundle: nil];
    UIWindow *window= [UIApplication sharedApplication].keyWindow;

    self.viewController = [[JASidePanelController alloc] init];
    self.viewController.shouldDelegateAutorotateToVisiblePanel = NO;
    self.viewController.leftPanel = [mainStoryboard instantiateViewControllerWithIdentifier:@"BBWSideMenuViewController"];
    self.viewController.centerPanel = [self.navigationController.viewControllers lastObject];

    window.rootViewController = self.navigationController;
    [window makeKeyAndVisible];

}

按钮动作方法，

- (IBAction)openSideMenu:(id)sender {
     [self.viewController showLeftPanelAnimated:YES];
}

当我按下按钮打开侧面菜单时，整个屏幕变黑。我该如何解决这个问题？任何帮助都感激不尽。