regex - Ignore escaped double quote characters swift -


i trying validate phone number using nspredicate , regex. problem when setting regex swift thinks trying escape part of due backslashes. how can around this?

my code follows:

let phoneregex = "^((\(?0\d{4}\)?\s?\d{3}\s?\d{3})|(\(?0\d{3}\)?\s?\d{3}\s?\d{4})|(\(?0\d{2}\)?\s?\d{4}\s?\d{4}))(\s?\#(\d{4}|\d{3}))?$"

in swift, still need double-escape slashes:

let phoneregex = "^((\\(?0\\d{4}\\)?\\s?\\d{3}\\s?\\d{3})|(\\(?0\\d{3}\\)?\\s?\\d{3}\\s?\\d{4})|(\\(?0\\d{2}\\)?\\s‌​?\\d{4}\\s?\\d{4}))(\\s?\\#(\\d{4}|\\d{3}))?$"

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