Back swipe gesture is not work when I add the leftBarButtonItem

Question

Here is a ViewControllerA push a ViewControllerB, and in the ViewControllerB the leftBarButtonItem is set as following:

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:self action:@selector(backBtnClicked:)];

After setting the leftBarButtonItem, the Back swipe gesture is not work. Is it possible to keep the swipe gesture?

Answer 1

Because you've changed the left bar button item, you're telling the navigation controller to stop managing the navigation-based back-actions that the user can take.

To fix it, you can tell the navigation controller to continue accepting those gestures on the current view controller by using:

self.navigationController.interactivePopGestureRecognizer.delegate = self;

Where self if your view controller.

UIViewController privately implements UIGestureRecognizerDelegate, so you'll get a warning for this, but you can mitigate this by adding in the protocol conformance (<UIGestureRecognizerDelegate>) to your header, or to a class extension.