Check the share extension configuration

Oct 13, 2025 by talynt.org 96 views

Introduction

Developing iOS share sheet extensions using Flutter can be a complex task, especially when it comes to debugging and troubleshooting issues. One common problem that many developers face is the share sheet extension crashing on physical devices. In this article, we will delve into the steps to reproduce this issue, the expected and actual results, and provide a code sample to help you understand the problem better.

Steps to Reproduce

To reproduce the issue, follow these steps:

Step 1: Create a Flutter App

Create a new Flutter project using the command flutter create my_app. This will create a basic Flutter app with a main.dart file.

Step 2: Set Up Share Sheet Extension

To set up a share sheet extension, follow the instructions in the Flutter documentation: Creating App Extension UIs with Flutter. This will guide you through the process of creating a new app extension and setting up the necessary files.

Step 3: Open Project in Xcode

Open the project in Xcode by navigating to the ios directory in your Flutter project and running the command open Runner.xcworkspace. This will open the Xcode project in a new window.

Step 4: Run on a Physical iOS Device

Connect a physical iOS device to your computer and run the app on the device by clicking the "Play" button in Xcode or by running the command flutter run in the terminal.

Step 5: Setup Debugger for Share Extension

To debug the share extension, follow these steps:

5.1: Attach to Process by PID or Name

In Xcode, navigate to Debug > Attach to Process by PID or Name.... This will open a new window where you can enter the name of the share extension.

5.2: Input Name of Extension

Enter the name of the share extension in the Process Name field. This is usually in the format com.example.my_app.share_extension.

5.3: Click Attach

Click the "Attach" button to attach the debugger to the share extension.

Step 6: Open Safari

Open Safari on your iOS device and navigate to a webpage that has a share icon.

Step 7: Click Share Icon

Click the share icon on the webpage to open the share sheet.

Step 8: Scroll to the Right

Scroll to the right to reveal the "More" option with three dots.

Step 9: Find Your App

Find your app in the list of available sharing options and click on it.

Step 10: Flutter Screen May or May Not Show

The Flutter screen may or may not show. If it does, try scrolling to reproduce the issue.

Expected Results

The expected result is that the app should not crash when the share extension is launched.

Actual Results

The actual result is that the app crashes with a message indicating that the share extension has crashed.

Code Sample

Here is a code sample that demonstrates the issue:

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});
  
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      builder: (context, child) => Scaffold(
        body: ListView.builder(
          itemCount: 100,
          itemBuilder: (context, index) => ListTile(
            title: Text('Item $index'),
          ),
        ),
      ),
    );
  }
}

This code sample creates a basic Flutter app with a ListView that has 100 items. When the share extension is launched, it crashes with a message indicating that the share extension has crashed.

Screenshots or Video

Unfortunately, there are no screenshots or video available to demonstrate the issue.

Logs

There are no logs available to provide more information about the issue.

Flutter Doctor Output

Here is the Flutter doctor output:

[✓] Flutter (Channel stable, 3.0.5, on macOS 12.6 21G115 darwin-x64, locale en-US)
[✓] Android Studio (2021.2)
[✓] Xcode (13.4.1)
[✓] VS Code (version 1.73.1)
[✓] Connected device (1 available)

• No issues found

This output indicates that the Flutter doctor has not found any issues with the project.

Conclusion

Q&A: Troubleshooting iOS Share Sheet Extension Crashes

Q: What are the common causes of iOS share sheet extension crashes?

A: The common causes of iOS share sheet extension crashes include:

Incompatible iOS versions: The share extension may not be compatible with the latest iOS versions, leading to crashes.
Incorrect configuration: The share extension may not be properly configured, leading to crashes.
Memory issues: The share extension may consume too much memory, leading to crashes.
Network issues: The share extension may experience network issues, leading to crashes.

Q: How can I troubleshoot iOS share sheet extension crashes?

A: To troubleshoot iOS share sheet extension crashes, follow these steps:

Check the console logs: Check the console logs for any error messages that may indicate the cause of the crash.
Use the Xcode debugger: Use the Xcode debugger to step through the code and identify the line that is causing the crash.
Test on different devices: Test the share extension on different devices to see if the issue is device-specific.
Check the share extension configuration: Check the share extension configuration to ensure that it is properly set up.

Q: What are some common error messages that indicate iOS share sheet extension crashes?

A: Some common error messages that indicate iOS share sheet extension crashes include:

"The app has crashed.": This error message indicates that the share extension has crashed.
"The share extension has crashed.": This error message indicates that the share extension has crashed.
"An error occurred while loading the share extension.": This error message indicates that there was an error loading the share extension.

Q: How can I prevent iOS share sheet extension crashes?

A: To prevent iOS share sheet extension crashes, follow these best practices:

Test thoroughly: Test the share extension thoroughly to ensure that it is working correctly.
Use the Xcode debugger: Use the Xcode debugger to step through the code and identify any potential issues.
Optimize the share extension: Optimize the share extension to ensure that it is not consuming too much memory.
Use a reliable network connection: Use a reliable network connection to ensure that the share extension can communicate with the server.

Q: What are some common issues that can cause iOS share sheet extension crashes?

A: Some common issues that can cause iOS share sheet extension crashes include:

Incompatible iOS versions: The share extension may not be compatible with the latest iOS versions, leading to crashes.
Incorrect configuration: The share extension may not be properly configured, leading to crashes.
Memory issues: The share extension may consume too much memory, leading to crashes.
Network issues: The share extension may experience network issues, leading to crashes.

Q: How can I resolve iOS share sheet extension crashes?

A: To resolve iOS share sheet extension crashes, follow these steps:

Check the console logs: Check the console logs for any error messages that may indicate the cause of the crash.
Use the Xcode debugger: Use the Xcode debugger to step through the code and identify the line that is causing the crash.
Test on different devices: Test the share extension on different devices to see if the issue is device-specific.
Check the share extension configuration: Check the share extension configuration to ensure that it is properly set up.

Conclusion

In conclusion, iOS share sheet extension crashes can be caused by a variety of issues, including incompatible iOS versions, incorrect configuration, memory issues, and network issues. By following the troubleshooting steps outlined in this article, you can identify and resolve the issue and prevent future crashes.