Could you do something like this?

1. Add a text input as another view outside the UIWebView

2. Translate the frame of the input off screen so it's not visible

3. Wire up the input with the webview to mirror focus with the webview text input (maybe a combination of UIWebView executing JS, and the web content passing redirects back to the webview delegate that get interrupted by webView:shouldStartLoadWithRequest:navigationType:)

4. Pass the text input back into the webview from the text view delegate method textView:shouldChangeTextInRange:replacementText: