I’ve been working with Prime31’s Etcetera plugin for iOS development with Unity3d. There are a lot of great things in there but some of the documentation is lacking. Anyways, if you want to show a local web page with the showWebPage command it is a two step process.

Step 1:

Copy the files you wish to access into a folder called StreamingAssets under your Assets directory.

Step 2:

Call EtceteraBinding as follows:

EtceteraBinding.showWebPage(Application.dataPath + "/Raw/FolderWithHTML/index.html");

where FolderWithHTML is the folder you placed in the StreamingAssets folder.