HeavenStudioPlus/Assets/Editor/CreateAssetBundles.cs

using UnityEditor;
using UnityEngine;
using System.IO;

public class CreateAssetBundles
{
    [MenuItem("Assets/Build AssetBundles")]
    static void BuildAllAssetBundles()
    {
    string assetBundleDirectory = "Assets/StreamingAssets";
    if (!Directory.Exists(Application.streamingAssetsPath))
    {
        Directory.CreateDirectory(assetBundleDirectory);
    }
    BuildPipeline.BuildAssetBundles(assetBundleDirectory, BuildAssetBundleOptions.None, EditorUserBuildSettings.activeBuildTarget);
    }
}