How to dismiss modal ViewController from UIAlertcontroller - ios

Question

I show a modal viewcontroller on which the user can decide to edit oder delete the presented car.
If the user wants to delete this car I present an UIAlertController with alert style to ask if he really wants to delete this car. Everything works fine. But after the user chooses "Yes" I am still in the modal viewcontroller.
How can I dismiss the modal view after the deletion?
I tried Following Code
self.parentViewController?.dismissViewControllerAnimated(true, completion: nil)
and
self.navigationController?.popViewControllerAnimated(true)
in the closure of the ok Action but both didn't worked for me. :(

Answer 1

There is no reason to write the code in
dispatch_async(dispatch_get_main_queue(), { //write your code here
})
The above code is used to the work in main thread. But here you are already on the main thread.
The issue here is you are calling
self.parentViewController?.dismissViewControllerAnimated(true, completion: nil)
Instead of it just write
self.dismissViewControllerAnimated(true, completion: nil)
Because you are presenting AlertController on self controller so the only one who can dismiss it is self

Answer 2

Put your code inside the
dispatch_async(dispatch_get_main_queue(), { //write your code here
})
like that :
func showDeleteWarningAndDeleteEntity() {
dispatch_async(dispatch_get_main_queue(), {
let deleteController = UIAlertController(title: "Delete car", message: "Are you sure?", preferredStyle: .Alert)
let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel) {
(action) in
}
let okACtion = UIAlertAction(title: "Yes", style: .Destructive) {
(action) in
//some network stuff happens here...
self.dismissViewControllerAnimated(true, completion: nil)
}
deleteController.addAction(okACtion)
deleteController.addAction(cancelAction)
self.presentViewController(deleteController, animated: true, completion: nil)
})
}
Hope this will works for you