[Swift] UIWebViewに任意のCookieをセット

swift

    var cookieProperties = [String: AnyObject]()
    cookieProperties[NSHTTPCookieName] = "cookiename"
    cookieProperties[NSHTTPCookieValue] = "cookievalue"
    cookieProperties[NSHTTPCookieDomain] = "www.example.com"
    cookieProperties[NSHTTPCookiePath] = "/"
    cookieProperties[NSHTTPCookieVersion] = NSNumber(integer: 0)
    cookieProperties[NSHTTPCookieExpires] = NSDate().dateByAddingTimeInterval(31536000)

    let newCookie = NSHTTPCookie(properties: cookieProperties)
    NSHTTPCookieStorage.sharedHTTPCookieStorage().setCookie(newCookie!)

これで、ドメインwww.example.comに対するcookieがセットされます。

参考（引用）：
http://stackoverflow.com/questions/29596206/how-to-get-cookie-from-a-nsurlsession-with-swift