TableView控制器上的粘性uiLabel

我正在试图在TableView控制器上创建一个粘性的uiLabel。但不幸的是,它与TableView一起移动。

func showinvisible() {
        var uzak = CGFloat()
        if UIDevice().userInterfaceIdiom == .phone {
            switch UIScreen.main.nativeBounds.height {
            case 1136:
                uzak = 120
            case 1334:
                uzak = 120
            case 1920, 2208:
                uzak = 120
            case 2436:
                uzak = 250
            default:
                print("unknown")
            }
        }
        let screenSize: CGRect = UIScreen.main.bounds
        self.dynamicLabel.frame = CGRect(x:0, y:screenSize.height - uzak, width:screenSize.width, height:80)
        self.dynamicLabel.backgroundColor = UIColor.orange
        self.dynamicLabel.textColor = UIColor.white
        self.dynamicLabel.textAlignment = NSTextAlignment.center
        self.dynamicLabel.text = NSLocalizedString("You are currenly invisible", comment: "")
        self.dynamicLabel.font = self.dynamicLabel.font.withSize(12)
        self.view.addSubview(self.dynamicLabel)
        self.view.bringSubview(toFront: self.dynamicLabel)
    }

我需要它留在屏幕的底部。知道吗?