Swift：重定向到系统设置文本大小

Question

有没有办法重定向到设置页面，以便用户可以设置其动态字体大小？使用下面的代码重定向到应用程序设置页面，但没有字体大小设置（有没有办法启用它？）

 let alertController = UIAlertController(title: "Body Font Size",
                                                message: "Please proceed to Settings > Display & Brightness > Text Size to change your system font.",
                                                preferredStyle: .Alert)

        let settingsAction = UIAlertAction(title: "Settings", style: .Default) {
            (alertAction) in
            if let appSettings = NSURL(string: UIApplicationOpenSettingsURLString) {
                UIApplication.sharedApplication().openURL(appSettings)
            }
        }
        alertController.addAction(settingsAction)

        let cancelAction = UIAlertAction(title: "Cancel", style: .Cancel, handler: nil)
        alertController.addAction(cancelAction)

        presentViewController(alertController, animated: true, completion: nil)