阻止第二个模式视图出现？

Question

I view controller that has different buttons a user can interact with. Each one does something different, but they all present a new view controller modally. The problem is that a user has time to tap another button before the first presentation has happened, which results in a crash. Is there a way to prevent a user from tapping another button or detect if a modal presentation is already going to happen?

I just don't want to let users present more than 1 modal view controller at a time.

Answer 1

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

if ([[segue identifier] isEqualToString:@"whateverSegue"])
    {
    [button setEnabled:NO];
    }
}

This should do the trick if its just once - otherwise a helper method called disableButtons or something to call if its in a few places should do the trick!

Answer 2

Check whether following steps are helpful.

Once you clicked button, you can disable the user interactions of the view.

-(IBAction)clickedButton:(id)sender {
   [self.view setUserInteractionEnabled:NO];

   // Do other things here
}

When model view controller appeared enable the user interactions of the view.

[self presentViewController:aViewController animated:YES completion:^{
   [self.view setUserInteractionEnabled:NO];
}];

Alternatively you can try following methods to disable touches in your Application

[[UIApplication sharedApplication] beginIgnoringInteractionEvents];

[[UIApplication sharedApplication] endIgnoringInteractionEvents];

https://stackoverflow.com/a/16609327/1208276