PBXProject.AddRemotePackageReferenceAtVersion

Добавляет ссылку на удаленный пакет в заданной версии.

using UnityEditor;
using System.IO;
using UnityEditor.Callbacks;
using UnityEditor.iOS.Xcode;

public class Sample_AddRemotePackageReferenceAtVersion  
{
    [PostProcessBuild]
    public static void OnPostprocessBuild(BuildTarget buildTarget, string pathToBuiltProject)
    {

        // Stop processing if build target is not iOS
        if (buildTarget != BuildTarget.iOS)
            return;

        // Initialize PBXProject
        string projectPath = PBXProject.GetPBXProjectPath(pathToBuiltProject);
        PBXProject pbxProject = new PBXProject();
        pbxProject.ReadFromFile(projectPath);

        // Get GUID you want to add the package to
        string mainTargetGuid = pbxProject.GetUnityMainTargetGuid();

        // Get the GUID of the Remote Package using the URL and specific version
        string packageGuid = pbxProject.AddRemotePackageReferenceAtVersion("https://github.com/apple/swift-system.git", "1.2.1");

        // Add the package to the Xcode project
        pbxProject.AddRemotePackageFrameworkToProject(pbxProject.GetUnityMainTargetGuid(), "SystemPackage", packageGuid, false);

        // Apply changes to the pbxproj file
        pbxProject.WriteToFile(projectPath);
    }
}