title: is it possible to get the index (String.Index) value from the cursor position of a UITextView element in Swift?
body: <p>I'm looking to pull the index value (<code>String.Index</code>) from the user cursor position of a UITextView element. I'm using the <code>selectedTextRange</code> method to get the UITextRange value. How can I use that to retrieve the index value?</p>