An attributed string extension which provides a new method to simply find and make links out of specified strings.

NSMutableAttributedStringExtension.swift

import Foundation

extension NSMutableAttributedString {
    
    public func setAsLink(textToFind:String, linkURL:String) -> Bool {
        
        let foundRange = self.mutableString.rangeOfString(textToFind)
        if foundRange.location != NSNotFound {
            self.addAttribute(NSLinkAttributeName, value: linkURL, range: foundRange)
            return true
        }
        return false
    }
}