如何在pop UIViewController中删除UIParallaxDimmingView？

我有一个UIViewController vc1这是在之后推送的UIViewController vc2. Both vc1 and vc2具有透明背景。

问题： 当我尝试弹出时vc2使用交互式弹出手势（从边缘平移），在我看来堆栈显得很神秘UIParallaxDimmingView这使我的堆栈变暗（在透明视图控制器下有一个背景图像）。 一旦我松开手指、取消或完成转换，它就会再次变得清晰/透明。

我如何禁用/删除UIParallaxDimmingView或者将其设置为透明？

如果当您尝试使用交互式弹出手势（从边缘平移）弹出 VC 时正在推送 VC（仍在动画），则应用程序可能会被冻结。这可以帮助您：

/ set gesture no when pushViewController /
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.interactivePopGestureRecognizer.enabled = NO;
    }

    [super pushViewController:viewController animated:animated];
}

/ set gesture yes when showViewController /
- (void)navigationController:(UINavigationController )navigationController didShowViewController:(UIViewController )viewController animated:(BOOL)animated
{
    if ([navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        navigationController.interactivePopGestureRecognizer.enabled = YES;
    }

    / if rootViewController, set delegate nil /
    if (navigationController.viewControllers.count == 1) {
        navigationController.interactivePopGestureRecognizer.enabled = NO;
        navigationController.interactivePopGestureRecognizer.delegate = nil;
    }
}