Share-With-Instagram-Unity-Plugin

A 2016-era iOS native plugin for Unity that opens the system share sheet (UIActivityViewController) to share text or an image — with a custom Instagram activity included — from Unity games. The repo also contains a standalone iOS sample app demonstrating the same Instagram-sharing flow with CocoaPods libraries.

Status: legacy. Last updated in 2017, built against iOS 9-era APIs (keyWindow, CocoaPods 1.0.1) and Instagram's old document-interaction sharing. It will not work as-is on modern iOS/Instagram and is kept as a reference sample.

Project Structure

Path	Description
UnityPlugin/	Xcode project containing the Unity native plugin
UnityPlugin/ShareWithInstagram/Unity Native Plugin/AlsoShareWithInstagram.mm	The plugin entry points: shareMessage(const char *) and shareImage(const char *imagePath, const char *message), exposed with C linkage for Unity's P/Invoke
UnityPlugin/.../DMActivityInstagram/	Bundled custom UIActivity that posts an image to Instagram
ShareWithInstagram/	Standalone iOS sample app (CocoaPods: MGInstagram, PKImagePicker) showing image pick → Instagram share

Usage (as designed)

1. Copy Unity Native Plugin/ (including DMActivityInstagram/) into your Unity project's Assets/Plugins/iOS/.

2. From C#, declare and call the native functions:

   [DllImport("__Internal")] private static extern void shareMessage(string message);
   [DllImport("__Internal")] private static extern void shareImage(string imagePath, string message);

3. Build for iOS; the functions present a share sheet from the root view controller.

The sample app under ShareWithInstagram/ requires pod install (CocoaPods) and opening the generated .xcworkspace.

Requirements

• Unity iOS build target (plugin code is Objective-C++)
• Xcode / iOS SDK of the era (circa 2016–2017)
• CocoaPods for the sample app only