如果在尝试使用交互式弹出手势弹出VC(从边缘平移)时推送VC(仍处于动画状态)，则该应用程序可能被冻结.这可以帮助您:

If it is pushing a VC(still animating) when you try to pop VC with interactive pop gesture(pan from edge), the app may be frozen. This can help you :

/ 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;
    }
}