Everybody, I'd like to know if in iOS there's a way to edit just some words, not all by keyboard.  

Do you think it would be good to use a `NSMutableDictionary` of `NSStrings` with keys that indicate whether they're editable or not, display them onto a `UILabel`? Then, when I press a key (for example, backspace) I update the label and delete the last character if and only if it is editable.  

Do you have better ideas?