Double tapping Editor control locks app when deployed to iOS

TazKing 85

Double tapping the Editor locks the app when deployed to iOS. This occurs for both net 8 and 9. Entry control works well and does not lock up the app. I added Editor and Entry controls to the demo Maui app as below. Am I missing a setting? Any known work-arounds?

    <ScrollView>
        <VerticalStackLayout
            Padding="30,0"
            Spacing="25">
            <Image
                Source="dotnet_bot.png"
                HeightRequest="185"
                Aspect="AspectFit"
                SemanticProperties.Description="dot net bot in a hovercraft number nine" />

            <Label
                Text="Hello, World!"
                Style="{StaticResource Headline}"
                SemanticProperties.HeadingLevel="Level1" />

            <Label
                Text="Welcome to &#10;.NET Multi-platform App UI"
                Style="{StaticResource SubHeadline}"
                SemanticProperties.HeadingLevel="Level2"
                SemanticProperties.Description="Welcome to dot net Multi platform App U I" />

            <Button
                x:Name="CounterBtn"
                Text="Click me" 
                SemanticProperties.Hint="Counts the number of times you click"
                Clicked="OnCounterClicked"
                HorizontalOptions="Fill" />

            <Editor Text="Hello" FontSize="24" VerticalOptions="Center" HorizontalTextAlignment="Center" HorizontalOptions="FillAndExpand" AutoSize="TextChanges"/>

            <Entry Text="Hello" FontSize="24" VerticalOptions="Center" HorizontalTextAlignment="Center" HorizontalOptions="FillAndExpand" />

        </VerticalStackLayout>
    </ScrollView>

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,481 Reputation points Microsoft Vendor

2024-11-15T06:33:53.2066667+00:00
For further investigation, could you please provide the following information?

The Maui version, and iOS API level.

What are the specific steps and symptoms to reproduce "Double tapping the Editor locks the app when deployed to iOS"? I tested it using the simulator and a physical device, and double-clicking the Editor does not cause the program to have special behavior.

Your prompt reply will be highly appreciated.
TazKing 85 Reputation points

2024-11-15T07:51:33.89+00:00
I noticed the issue running net9 Maui and iOS18.1. The project file lists net9.0-ios as target framework and SupportedPlatForm version 15.0. The above code is from the net9 maui demo and I added the editor and entry controls at the bottom. No other changes to the demo code was made.

<Editor Text="Hello" FontSize="24" VerticalOptions="Center" HorizontalTextAlignment="Center" HorizontalOptions="FillAndExpand" AutoSize="TextChanges"/> <Entry Text="Hello" FontSize="24" VerticalOptions="Center" HorizontalTextAlignment="Center" HorizontalOptions="FillAndExpand" />

Code works well on Windows and Android. Have tested on a local device (iPad M2) and a simulated on M4 iPad. On both local and simulated iPads, the entry control works fine but double tapping the text in the editor control locks-up the app. I'm re-testing net8 maui and will add to this post ASAP.
TazKing 85 Reputation points

2024-11-15T16:35:37.9866667+00:00

I've re-tested the Editor control in net8 Maui in iPad using the same code as above, it indeed has the same issue. Double tapping the editor control locks-up the app. Entry control has no issues.
TazKing 85 Reputation points

2024-11-15T17:08:58.87+00:00

I have also discovered the "double tap" issue is only associated with finger or pen input. There is no issue using keyboard input on the iPad. Disabling Productivity and 4 and 5 Finger gestures and other iPad gestures has no effect. FYI, the double tap gesture on iPad selects the entire word.
TazKing 85 Reputation points

2024-11-15T18:59:34.39+00:00

I tested it using the simulator and a physical device, and double-clicking the Editor does not cause the program to have special behavior.

Which iOS platform did you test, iPhone?
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,481 Reputation points Microsoft Vendor

2024-11-18T08:42:13.51+00:00

I noticed the issue running net9 Maui and iOS18.1. The project file lists net9.0-ios as target framework and SupportedPlatForm version 15.0.

Have you tested on a device below 18.1? The iOS device I tested on does not have 18.1 yet. Also, is Accessibility Mode turned on on your iOS device?

Your prompt reply will be highly appreciated.
TazKing 85 Reputation points

2024-11-18T09:01:15.5633333+00:00

Yes, error persists in simulated iPad M4 iOS 17.5, which is the oldest it has.

...is Accessibility Mode turned on...

There is no "accessibility mode" to turn on. Can you be more specific as to which accessibility feature(s) need to be turned on.

Which platforms did you test?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-19T09:42:48.8433333+00:00

I have also discovered the "double tap" issue is only associated with finger or pen input.

Could you describe in detail how the "double tap" blocks the app？ Would you mind taking some screenshots to show the current behavior?

After testing on iOS simulators and my physical device, I still cannot reproduce the issue.
TazKing 85 Reputation points

2024-11-19T17:54:00.0666667+00:00

It crashes the app, locks it down, think BSOD. I was going to video this using the iOS simulator, but VS is telling me today there is a "fatal server error" connecting to my Mac, so I can't run the simulator. Will have to get back to you on that.

I've asked 3 times which iOS you're testing. I suspect you're testing on iPhone. If that's the case, then your test is not valid. iPhones and iPads are different, even though VS may lead one to believe they're the same.
TazKing 85 Reputation points

2024-11-19T21:02:04.83+00:00

I have a 4MB video but cannot attach because system doesn't accept mp4 this big. I attached Editor and Entry controls as described above in the maui demo app. Click button works fine. Entry control works fine. Double clicking on Editor locks the app down. No response of any kind. Works just like this on physical device.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-20T06:39:40.9666667+00:00

Thanks for your feedback, you could upload the video on the website you like and attach the link here.
TazKing 85 Reputation points

2024-11-20T06:50:13.5133333+00:00

Which iOS platform are you testing on?
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-20T07:09:05.8233333+00:00

iOS 17.5 simulator, iPhoneXSMax with iOS17.4.1.
TazKing 85 Reputation points

2024-11-20T07:12:03.59+00:00

iPhones are not the same as iPad, this issue is a huge bug for my app.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-20T07:30:55.3233333+00:00

The issue only occurs on iPad, right?
TazKing 85 Reputation points

2024-11-20T07:34:05.7066667+00:00

As per your testing, iPhones appear to be unaffected. My app is not intended for phones so I don't test them.
TazKing 85 Reputation points

2024-11-20T07:36:43.57+00:00

For the record, the Editor control is quite buggy. I've got 2 issues reported now, several others that I have not reported.
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-20T08:57:05.3433333+00:00

Do you mean reporting the issue on GitHub?
TazKing 85 Reputation points

2024-11-20T09:12:03.5966667+00:00

yes, that's what I mean
Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-21T06:27:35.1033333+00:00

I found the issue you reported- Double tapping Editor control locks app when deployed to iPad. · Issue #25975 · dotnet/maui, please follow the progress at GitHub.

1 answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2024-11-21T08:20:58.96+00:00

Hello,

I found the issue you reported- Double tapping Editor control locks app when deployed to iPad. · Issue #25975 · dotnet/maui, please follow the progress at GitHub.

Best Regards,

Wenyan Zhang

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