[ BUG ] : shareToSystem on iOS if clicking on Instagram get error multiple photos not allowed

[riccardo-rusca]

Plugin name
Appinio social share 0.3.2

Describe the bug
When trying to share a single photo to Instagram via default system share sheet, I get an error saying that it is not possible to share multiple photos and video on Instagram.

To Reproduce
Steps to reproduce the behavior:
final pngBytes = ...
final directory = await getApplicationDocumentsDirectory();
final path = directory.path;
File file = File('$path/image');
await file.writeAsBytes(pngBytes);
await appinioSocialShare.iOS.shareToSystem(
'Check my image!', filePaths: [file.path],
);

Expected behavior
Be able to share a single image to Instagram as I can do from any photo, without any text

Screenshots

Desktop (please complete the following information):

• OS: iOS 18.1

Smartphone (please complete the following information):

• Device: iPhone 14 Pro
• OS: iOS 18.1

[riccardo-rusca]

If someone is interested I changed the behavior here: https://github.com/riccardo-rusca/flutter_social_share.git
Now there are two functions for iOS:

1. Future shareToSystem(String message, String? filePath)
2. Future shareFilesToSystem({List? filePaths})

The first one fix the Instagram bug, allowing to share just a single image. the old behavior is implemented in the second function.