iOS Push to another view controller get stuck - ios

Question

I have an base view controller and all my viewcontrollers inherit it.
#interface BaseViewController () <UIGestureRecognizerDelegate>
#end
#implementation BaseViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.tabBarController.tabBar.translucent = NO;
self.navigationController.navigationBar.translucent = NO;
self.navigationController.interactivePopGestureRecognizer.delegate = self;
self.view.backgroundColor = [UIColor colorWithRed:0.95 green:0.95 blue:0.95 alpha:1];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:self.backButton];
self.navigationItem.backBarButtonItem.title = #"";
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (UIStatusBarStyle)preferredStatusBarStyle {
return UIStatusBarStyleDefault;
}
- (void) popToPreViewController {
[self.navigationController popViewControllerAnimated:YES];
}
#pragma mark - getter and setter
- (UIButton *) backButton {
if (!_backButton) {
_backButton = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 20.0, 20.0)];
[_backButton addTarget:self action:#selector(popToPreViewController) forControlEvents:UIControlEventTouchUpInside];
[_backButton setImage:[UIImage imageNamed:#"main_back"] forState:UIControlStateNormal];
_backButton.hidden = YES;
}
return _backButton;
}
#end
Sometimes push to another view controller will get stuck ,but the app does not crash.Press home button and open the app again, it shows the another view controller . Is there something wrong with this baseviewcontroller ?

Answer 1

I have been troubled by this problem for a long time, now find a solution.
The reason for this problem is that the root controller performs a gesture pop operation, the problem described above occurs. The workaround is to disable the gesture pop at the root controller and open the gesture pop on the non root controller.
/// The controller is fully displayed, opening the gesture pop
Func navigationController (_ navigationController: UINavigationController, didShow viewController: UIViewController, animated: Bool) {
If viewControllers.first == viewController {
InteractivePopGestureRecognizer? .isEnabled = false
} Else {
InteractivePopGestureRecognizer? .isEnabled = true
}
NavigationBar.sendSubview (toBack: navigationBar.overlay)
}