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Create a native plug-in for iOS

Create a native plug-in for your iOS project and import it into Unity.
Read time 1 minuteLast updated 12 days ago
Create a native plug-in for iOS and import it 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:
Note
Use 
"__Internal"
as the library name when your native code is built into the same binary as the Unity runtime. For example, a statically linked plug-in. If your native code is in a dynamic library (
.dylib
), use the library name instead. For example, 
"MyPlugin"
for 
MyPlugin.dylib
.
[DllImport ("__Internal")]private static extern float FooPluginFunction();

Use C linkage to prevent name mangling

If you use C++ (
.cpp
) or Objective-C++ (
.mm
) for your plug-in, declare functions with C linkage to avoid name mangling:
extern "C" {  float FooPluginFunction();}
C or Objective-C plug-ins don’t require C linkage as they don’t use name mangling.
If you use Swift for your plug-in, use the 
@_cdecl
attribute to export functions with C linkage and avoid name mangling:
@_cdecl("FooPluginFunction")func AnythingFooPluginFunction() -> Float {    return 3.14}

Import your native plug-in into your Unity project

Add your native source files to your project's 
Assets
folder.

Configure plug-in settings

Use the Inspector window to configure your plug-in so Unity includes it in the generated Xcode project. Refer to Configure a plug-in for iOS with the Inspector window for details.

Additional resources