viewWillAppear and modalview

modal presentations have changed in iOS 13, and yes indeed, viewWillAppear is not called when (most?) modals are dismissed.

take a look at the WWDC 19 video "Modernizing Your UI for iOS 13," and you'll see the changes. i think there are new callbacks added to iOS13, and i think these are mentioned in the video, but i thought they weren't yet available in the beta releases (i haven't checked recently).

one thing i've started to do is to clean up some existing code to handle this, often by setting a completion handler to be called when the modal viewController is dismissed (example: call a completion handler that does something like "self.tableView.reloadData()" for the presenting viewController after the presented viewController is dismissed).

you can handle more sophisticated cases either by adding some level of delegation to your modal view controller, or implementing a callback function that the modal viewController can execute for you before being dismissed.

hope that helps,

DMG

DelawareMathGuy is correct. The the new delegate methods for detecting when an interactive dismissal has occurred do work as documented. I've written a pretty comprehensive Medium article on the changes: https://medium.com/@hacknicity/view-controller-presentation-changes-in-ios-13-ac8c901ebc4e

thanks i will try... i have over 300 xib views... do you know if any new betas will published? i found also a bug in settings bundle that not can edit field

Simone,

sorry that i can't help anymore on what i said above -- and i'm not sure i'm even covering all cases in my suggestions. i certainly don't know about beta releases, although they tend to come about every two weeks (the last XCode beta 3 release was July 2, so one would expect another tomorrow, July 16).

i went back to the WWDC video, and the best i can summarize is that

(1) most modal presentations in your app will default to a sheet presentation in iOS 13.

(2) it appears you can defeat this by seting the modalPresentationStyle to .fullScreen [either in code, whether you call present() or when you see the about-to-be-presented controller in prepareForSegue(), or in a storyboard by checking the modal presentation style of a segue] -- but you probably should not do this unless there's a UI reason to do it (and not just a coding reason to avoid having to deal with a sheet presentation)

(3) the viewWillAppear ... viewWillDisappear calls you are used to handle modal transitions definitely are not the places to react to modal presentations that default to sheets, since the presenting view controller is not removed from the view hierarchy.

(4) all of this transition detail is now handled by adopting the

UIAdaptivePresentationControllerDelegate

from there, you are on your own. i have not taken any action on implementing any of this myself, and i'd prefer to wait a little longer to do so.

hope that helps, and good luck,

DMG

thanks... i hope... also there is a bug un settings bundle... cannot write inside textfield of settings simulator o device

thanks... any ideas about the works beta from apple?

Hi Simone! I found this bug too.
Try this one
self.navigationController.modalPresentationStyle = UIModalPresentationFullScreen;
It helps me. Thanks!

NView.modalPresentationStyle=UIModalPresentationOverFullScreen;

[self presentViewController:NView animated:NO

completion:nil];

i solve it with this:

          
   NView.modalPresentationStyle=UIModalPresentationOverFullScreen;
   [self presentViewController:NView animated:NO
                             completion:nil];

 NView.didDismiss = ^(NSString *data) 
      {
           if([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0f)
              {
              [self viewWillAppear];  
              }
            };

and inside NView when i dismiss i call didDismiss()
           

Hi, I have solved it using the SecondVCDelegate protocol that calling mandatorily the function viewWillAppear() in the first VС.