objective-c - How to disable the side right swipe pop gesture of the current controller? Currently, VC is pushed here.

Question

For example: My controller is a navigation controller, and now there is a controller A that I pushed over. I hope that this controller can only pop by clicking the return button on the left side of the navigation bar, and the gesture of sliding right on the side will pop. I wish I could disable it. Of course, I hope other controllers don’t still have this pop...

高洛峰 · Answer

Write in controller A:

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    self.navigationController.interactivePopGestureRecognizer.delegate = self;
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    self.navigationController.interactivePopGestureRecognizer.delegate = nil;
}

// 给该控制器添加协议 

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    return gestureRecognizer != self.navigationController.interactivePopGestureRecognizer;
}

伊谢尔伦 · Answer

If the construction from A -> B is more elegant

Inside B’s viewDidLoad

self.navigationController.interactivePopGestureRecognizer.delegate = self;

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

Then inside viewDidDisappear

self.navigationController.interactivePopGestureRecognizer.enabled = YES;

It’s all written in B, isn’t it much more elegant