UINavigationContoller interactivePopGestureRecognizer inactive when navigation bar is hidden

Question

I have a view controller which is nested within a UINavigationController.

I have implemented the iOS 7 interactivePopGestureRecognizer to enable the user to

Answer 1

I used this. self.navigationController.interactivePopGestureRecognizer.delegate = self;

also in my UINavigationController class to disable interactivePopGestureRecognizer during transitions.

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

    [super pushViewController:viewController animated:animated];
}

- (void)navigationController:(UINavigationController *)navigationController
       didShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated
{
    if ([navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        // disable interactivePopGestureRecognizer in the rootViewController of navigationController
        if ([[navigationController.viewControllers firstObject] isEqual:viewController]) {
            navigationController.interactivePopGestureRecognizer.enabled = NO;
        } else {
            // enable interactivePopGestureRecognizer
            navigationController.interactivePopGestureRecognizer.enabled = YES;
        }
    }
}

the reason of disable interactivePopGestureRecognizer in rootViewController is:when swipe from edge in rootViewController and then tap something to push in next viewController, the UI won't accept any touches now.Press home button to put app in background , and then tap it to enter foreground...