Adds a link to a URL for a specified text/range

NSMutableAttributedString.swift

extension NSMutableAttributedString {

    /**
     Transforms the given text into a tappable link

     - parameters:
        - url: the destination url
        - text: the substring that should be made tappable
        - attributes: optional dictionary of parameters to customize the link's appearance
     */
    func addLink(to url: URL, from text: String, attributes: [NSAttributedStringKey : Any] = [:]) {
        guard let range = string.range(of: text) else {
            assertionFailure("Unable to find \(text) inside \(string)")
            return
        }
        addLink(to: url, in: range, attributes: attributes)
    }

    /**
     Transforms the text inside the given range into a tappable link

     - parameters:
        - url: the destination url
        - range: the range of characters that should be made tappable
        - attributes: optional dictionary of parameters to customize the link's appearance
     */
    func addLink(to url: URL, in range: Range<String.Index>, attributes: [NSAttributedStringKey : Any] = [:]) {
        let nsRange = NSRange(range, in: string)
        addAttribute(.link, value: url, range: nsRange)
        addAttributes(attributes, range: nsRange)
    }
}