试图解雇UIAlertController iOS 8

Question

Crashlytics send me this error in my app:

Fatal Exception: NSInternalInconsistencyException
Trying to dismiss UIAlertController <UIAlertController: 0x14de40020> with unknown presenter.

UIKit   
-[UIAlertController _dismissAnimated:triggeringAction:triggeredByPopoverDimmingView:] + 584

This problem only occurs in iOS 8 but when I try to reproduce this error, my alertViews work correctly in iOS 8 and nothing bad happens. Why this problem is happening?

I have read that in iOS 8 UIAlertView is deprecated and now, we have to use UIAlertController but when I try to use UIAlertController I can't dismiss the alert and the functionality is not the same.

Please help me.

Thank you for advance.

EDIT:

The code I want to change is this:

UIAlertView * alerta = [[UIAlertView alloc] initWithTitle: AMLocalizedString(@"alertUpdate", @"")
                                                  message:@"\n"
                                                 delegate:self
                                        cancelButtonTitle:nil
                                        otherButtonTitles:nil];

UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
spinner.center = CGPointMake(139.5, 75.5); // .5 so it doesn't blur
[alerta addSubview:spinner];
[spinner startAnimating];
[alerta show];


UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:dis bundle:nil];
MainVC *main = [storyBoard instantiateViewControllerWithIdentifier:@"MainVC"];
UINavigationController *navControl = [[UINavigationController alloc] initWithRootViewController: main];
[self presentModalViewController: navControl animated: YES];

[alerta dismissWithClickedButtonIndex:0 animated:YES];

Answer 1

Replace this

[self presentModalViewController: navControl animated: YES];
[alerta dismissWithClickedButtonIndex:0 animated:YES];

With this

[alerta dismissWithClickedButtonIndex:0 animated:YES];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
    [self presentModalViewController: navControl animated: YES];
}]; 

This presents a new controller asynchronously to make sure the alert view is dismissed

Answer 2

Not sure if you were able to solve this, but I had a similar issue and here is a potential solution:

Implement the UIAlertViewDelegate Protocol and override the alertView:didDismissWithButtonIndex: method.

Any presenting or dismissing of view controllers should occur within this method to be 100% sure that the the AlertView is completely dismissed before we navigate elsewhere and the "presenter" becomes unknown.

You can also do this when navigating from a UIActionSheet button click.

Answer 3

Set popoverPresentationController for UIAlertController

Use like this code :

UIAlertController * alertController = [UIAlertController alertControllerWithTitle:@"Title"
                                                                                  message: nil
                                                                           preferredStyle: UIAlertControllerStyleActionSheet];
        [alertController addAction: [UIAlertAction actionWithTitle: @"title" style: UIAlertActionStyleDefault handler:^(UIAlertAction *action) {

        }]];
CGRect rect = self.view.frame;
 rect.origin.x = self.view.frame.size.width / 20;
 rect.origin.y = self.view.frame.size.height / 20;
[alertController.popoverPresentationController setPermittedArrowDirections:0];
alertController.popoverPresentationController.sourceView = self.view;
alertController.popoverPresentationController.sourceRect = rect;
[alertController setModalPresentationStyle:UIModalPresentationPopover];
[self presentViewController: alertController animated: YES completion: nil];