问题
I have a UITabBarController with three tab bar items. The tab bar items has view controllers of the type UINavigationController. Each navigation controller has UIViewController as the top view controller. Each view controller on the top of the navigation controller stack has its own flow. When the user swipes at the edge of the screen to trigger interactivePopGestureRecognizer, and upon the popping out the view controller from the stack, the tab bar items becomes not interact-able. Any idea, why is this happening?
I can only interact when I push another view on top of the existing view controller.
来源：https://stackoverflow.com/questions/31244404/interactivepopgesturerecognizer-causes-the-uitabbarcontroller-disables-interacti