Open one of Twitter apps with username

SomeViewController.swift

        let username = organizer.twitter
        
        let twitterURLs = [
            "twitter://user?screen_name=\(username)", // Twitter
            "tweetbot://user_profile/\(username)", // TweetBot
            "echofon://user_timeline?\(username)", // Echofon
            "twit://user?screen_name=\(username)", // Twittelator Pro
            "x-seesmic://twitter_profile?twitter_screen_name=\(username)", // Seesmic
            "x-birdfeed://user?screen_name=\(username)", // Birdfeed
            "tweetings://user?screen_name=\(username)", // Tweetings
            "simplytweet://?link=http://twitter.com/\(username)", // SimplyTweet
            "icebird://user?screen_name=\(username)", // IceBird
            "fluttr://user/\(username)", // Fluttr
        ]
        
        var applicationOpened: Bool = false
        let application = UIApplication.sharedApplication()
        for twitterURL in twitterURLs {
            if let url = NSURL(string: twitterURL) where application.canOpenURL(url) && !applicationOpened {
                application.openURL(url)
                applicationOpened = true
                break
            }
        }
        
        if !applicationOpened {
            let webViewController = WebDisplayViewController()
            webViewController.url = NSURL(string: "http://twitter.com/\(username)")!
            webViewController.displayTitle = "@\(username)"
            navigationController?.pushViewController(webViewController, animated: true)
        }

from https://github.com/NatashaTheRobot/trySwiftApp/blob/master/trySwift/OrganizersTableViewController.swift