Create a native plug-in for iOS

Create a native plug-inA set of code created outside of Unity that creates functionality in Unity. There are two kinds of plug-ins you can use in Unity: Managed plug-ins (managed .NET assemblies created with tools like Visual Studio) and Native plug-ins (platform-specific native code libraries). More info
See in Glossary for iOS and import into your Unity project.

Define an extern method

For each native function you want to call, define an extern method in the C# file as follows:

[DllImport ("__Internal")] 
    
private static extern float FooPluginFunction();

Use C linkage to prevent name mangling

If using C++ (.cpp) or Objective-C++ (.mm) to implement your plug-in, declare functions with C linkage to avoid issues with name mangling:

extern "C" {
  float FooPluginFunction();
}

Plug-ins written in C or Objective-C don’t need this, because these languages don’t use name mangling.

Import your native plug-in into your Unity Project

Add your native code source files to the Unity Project’s Assets Folder.

Configure plug-in settings

To configure plug-in settings for iOS:

1. Select the plug-in and view it in the InspectorA Unity window that displays information about the currently selected GameObject, asset or project settings, allowing you to inspect and edit the values. More info
   See in Glossary.
2. In the Select platforms for plugin section, enable iOS.
3. In the Platform settings section, set CPU to the CPU architecture for your plug-in.
4. Select Apply.

Additional resources

• Use your native plug-in for iOS