Convert text to Base64 - Swift

base64.swift

func textFieldShouldReturn(textField: UITextField) -> Bool {
    urlField.resignFirstResponder()
    let data = urlField.text!.dataUsingEncoding(NSUTF8StringEncoding)
    let urlFieldBase64 = data?.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength)
    return false
}