Get word under tap from UIWebView using JavaScript

问题

I'm displaying some local web content and would like to get the word under the tap point. The single tap delegate is setup and I can get it to work great if I use a UITextView and load the HTML with a NSAttributedString and NSHTMLTextDocumentType, but I lose formatting such as paragraph spacing and small caps; adding a NSMutableParagraphStyle is without effect.

Using a UIWebView and loadHTMLString that includes JQuery, is there a way? There are several pages which show how to use JS to get the word under the cursor, such as the following:

How to get a word under cursor using JavaScript?

How to get word under cursor?

Get word under mouse pointer

Is it possible to get the word under the mouse cursor in a `<textarea>`? How to get word under cursor?

But after several days, I've been unable to get it to work. My code:

var jsFile = NSBundle.mainBundle().pathForResource("webview", ofType: "js");
let jsData = NSString(contentsOfFile:jsFile!, encoding:NSUTF8StringEncoding, error:nil) as! String
let returned = webView.stringByEvaluatingJavaScriptFromString(jsData)! as String
println("Returned \(returned).")

The word could be unicode with a different code range, but getting any word to work first would be wonderful.

来源：https://stackoverflow.com/questions/31175224/get-word-under-tap-from-uiwebview-using-javascript