Question

I want to switch to another viewController. I have an UIButton on my view, the UIButton have an UILongPressGestureRecognizer by using this code:

UILongPressGestureRecognizer *buttonLongPressRecognizer;
buttonLongPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LoadButtonSettings:)];

buttonLongPressRecognizer.numberOfTouchesRequired = 1;
buttonLongPressRecognizer.minimumPressDuration = 2.0;

[NewButton addGestureRecognizer:buttonLongPressRecognizer];

The action I use to switch viewControllers are this:

- (IBAction)LoadButtonSettings:(id)sender {

[ButtonSettingsViewController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];

[self presentViewController:ButtonSettingsViewController animated:YES completion:NULL];

}

The problem is that when I make a long press on the button my app crashes and gives me a SIGABRT error. Weirdly enough it only happens on my iPhone, not on the simulator.

I have also tried using

    [self presentModalViewController:ButtonSettingsViewController animated:YES];

and got the same problem. As I know SIGABRT means there’s a memory issue, which I don’t understand since Automatic Reference Counter is on.

Any ideas on how to fix this?

Thanks in advance 🙂

Answer 1

If ButtonSettingsViewController is the type of view controller you need to initialize it first:

- (IBAction)LoadButtonSettings:(id)sender {
    // init & alloc - Replace with your custom view controllers initialization method (if applicabale)
    ButtonSettingsViewController *viewController = [[ButtonSettingsViewController alloc] initWithNibNamed:@"ButtonSettingsViewController" bundle:nil];

    [viewController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];
    [self presentViewController:viewController animated:YES completion:NULL];
}