StreamingAssetsPath unity iOS?

Question

Unity

Hello.
I need to open a local html file in webview
Links like
file:///path/file.html
It works well on Android and iOS Simulator but doesn't work on iOS build (doesn't load html).

Local link generator

public string generatePath(string path)
    {
#if (UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX || UNITY_IOS) && !UNITY_EDITOR_WIN
        return Path.Combine("file://" + Application.streamingAssetsPath, path);
#elif UNITY_ANDROID
        return Path.Combine("file:///android_asset/", path);
#else
        return Path.Combine("file://" + Application.streamingAssetsPath, path);
#endif
    }

usage

webViewObject.LoadURL(generatePath("local_www/History/History_XIX.html"));