The app is crashing after sent to background IOS only

[alaa3latol]

Description

I have a problem with IOS only when the app sent to background, it crashes and restarted. I searched and tried to handle DidEnterBackground but nothing worked for me.

I have sent in the attachments AppDelegate file AppDelegate.txt

Steps to Reproduce

I handled the DidEnterBackground function in AppDelegate but nothing worked

Link to public reproduction project repository

No response

Version with bug

8.0.3 GA

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No

Relevant log output

No response

[jfversluis]

Thanks for the report here. I'm very sorry but without any relevant code or logs or anything it will be impossible to determine if this is a potential bug in .NET MAUI or something in your codebase.

[alaa3latol]

I have updated the post and attached the appdelegate code file , I really don't know from where I begin. AppDelegate.txt

[alaa3latol]

Dear Gerald, I really don't know which code should I share! , I attached the AppDelegate file. if there any code files you want me to share please let me know.

best regards Alaa Atef

On Sat, Mar 30, 2024 at 11:50 AM Gerald Versluis @.***> wrote:

Thanks for the report here. I'm very sorry but without any relevant code or logs or anything it will be impossible to determine if this is a potential bug in .NET MAUI or something in your codebase.

— Reply to this email directly, view it on GitHub https://github.com/dotnet/maui/issues/21533#issuecomment-2027995278, or unsubscribe https://github.com/notifications/unsubscribe-auth/BHOI2KSZ5HWWYX2XVJZ3P5DY2Z4DPAVCNFSM6AAAAABFPG76D2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMRXHE4TKMRXHA . You are receiving this because you were mentioned.Message ID: @.***>

[Yannikk1996]

Hi, i have the same issue. My AppDelegate has no special code. I cannot get any logs. Debugger disconnects before anything can be traced. Any ideas how to trace this bug?

[neelpanchal52]

Hi, I have the same issue. When the app is in the background it crashes and restarts and does not get any exceptions or logs.

[CoeqWEty]

Hi we have the same issue. It constantly occurs. It seems relatively new. We've been trying to convert from xamarin 5 thru several net mauireleases.

This is likely a net Maui 8 issue.

This needs a an urgent high priority fix. Crashing in background makes it undeployable or and at minimum a very pooR Zux

@jfversluis

[Pastajello]

I'd suggest removing api keys from the file at least. If needed consider sending the details to jsuarez/others privately. @alaa3latol

[Yannikk1996]

any news?

[umike72]

Seeing the same issue here. The problem started occurring once I've implemented the OnActivated method in AppDelegate. Even if there is no code in it, I get the exception "System.InvalidOperationException: 'Window was already deactivated' when sending the app to background by clicking on the iOS emulator home button.

I can reproduce it as follows (MAUI .net8, VS 17.9.6)

        [Foundation.Export("applicationDidBecomeActive:")]
        public override void OnActivated(UIKit.UIApplication application)
        {
            ;
        }

The stacktrace looks like this:

0xD in xxxxxx.Program.Main at D:\src\rlmc\xxxxx\Platforms\iOS\Program.cs:13,13
	at D:\src\rlmc\xxxxx\Platforms\iOS\Program.cs(13)

Program.cs wasn't modified from the auto-generated code. Commenting out the OnActivated() method makes the crash go away.

[umike72]

Update: Ignore my previous comment. If I add the line "base.OnActivated(application);" to the OnActivated() method shown above, the app won't crash when sending to background.

[dotnet-policy-service[bot]]

Hi @alaa3latol. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[dotnet-policy-service[bot]]

This issue has been automatically marked as stale because it has been marked as requiring author feedback to reproduce the issue but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment. If it is closed, feel free to comment when you are able to provide the additional information and we will re-investigate.

[CoeqWEty]

@umike72 Hi- Did you do something to an app that goes to background to not restart. Can you send code inline. We still experience the issue and tried multiple things. We get a crash reported by testflight but its just app restarts instead of staying open.

Update: Ignore my previous comment. If I add the line "base.OnActivated(application);" to the OnActivated() method shown above, the app won't crash when sending to background.

Update: Ignore my previous comment. If I add the line "base.OnActivated(application);" to the OnActivated() method shown above, the app won't crash when sending to background.