Скачать или смотреть Resolving flutter image picker not working and crashing app without error on debug

Discover how to fix the issue of the Flutter image picker crashing your app without error messages in debug mode.
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Troubleshooting Flutter Image Picker Crashes

If you’re developing a Flutter app and have encountered the frustrating issue of the image picker not working, you are not alone. Often, clicking the button to activate the pickImage function leads to an abrupt app crash with the ominous message: Lost connection to device. In this guide, we’ll help you understand the root cause and how to fix this issue step-by-step.

Problem Overview

You may be using a setup similar to the following:

Flutter version: 2.16.0

Image Picker version: ^0.8.4+7

When trying to pick an image from the gallery, the app stops responding, leading to a crash. While the debug output provides very little information, understanding the underlying problem can save you a lot of headaches.

Let’s take a look at the code relevant to this issue:

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Solution: Update iOS Permissions

One common reason for this crash on iOS devices is that the app lacks the necessary permissions to access the photo library, leading to an abrupt termination. To resolve this, you'll need to add a key to your Info.plist file which serves as your app’s configuration file for iOS.

Steps to Modify Info.plist

Locate your iOS project directory: Open your Flutter project and navigate to ios/Runner/Info.plist.

Edit Info.plist: Add the following code snippet to declare the usage of the photo library.

[[See Video to Reveal this Text or Code Snippet]]

Save the Changes: After adding the code snippet, save the Info.plist file.

What This Change Does

By adding the NSPhotoLibraryUsageDescription key, you're explicitly requesting the user's permission to access their photo library. This will help prevent the app from crashing when trying to pick an image, as it ensures that the app complies with iOS privacy requirements.

Conclusion

By following these steps, the image picker issue in your Flutter application should be resolved. Remember, adding permissions in Info.plist is critical for accessing system resources on iOS. Always make sure your app has the necessary permissions before running a function that interacts with such resources.

Should you encounter any further issues, consider reviewing permissions or checking for any other error messages. Happy coding!