qt quick应用程序中的qml Animatin在ColumLayout中不起作用

我想在SplashScreen上设置文本动画,但它不起作用,但这个qml动画可以工作,但大规模的动画可以工作

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Window 2.15
import QtQuick.Layouts 1.15
Page{
    id:splashPage
    Component.onCompleted: {
        txtAnimation.start();
    }
    ColumnLayout{
        id:clm
        anchors.fill: parent
        Image {
            id: icon
            source: "/images/icon.png"
            Layout.preferredHeight: 200
            Layout.preferredWidth: 200
            Layout.alignment: Qt.AlignHCenter
            Layout.topMargin: (clm.implicitHeight-icon.height)/2
        }
        Text{
            id:txt
            text: "Title under application icon" 
            Layout.alignment: Qt.AlignHCenter|Qt.AlignTop
        }
        Item {
            Layout.fillHeight: true
        }
    }
    SequentialAnimation{
        id:txtAnimation
        NumberAnimation {
            target: txt
            duration: 1000
            easing.type: Easing.OutElastic
            properties: "x"
            from: -1000
        }
        SequentialAnimation {
            loops: Animation.Infinite
            alwaysRunToEnd: true
            PauseAnimation{
                duration: 600
            }
            PropertyAnimation {
                target: txt
                property: "scale"
                to: 1.0
                duration: 100
            }
            PropertyAnimation {
                target: txt
                property: "scale"
                to: 0.85
                duration: 400
            }
            PropertyAnimation {
                target: txt
                property: "scale"
                to: 1
                duration: 100
            }
        }
    }
}

当我将NumberName改为Lower时,它可以工作,但在ColumnLayout中,它没有x属性

        NumberAnimation {
            target: txt
            duration: 1000
            easing.type: Easing.OutElastic
            properties: "x"
            from: -1000
            to:25
        }

我像下面这样修改了代码,但它不起作用

        Text{
            id:txt
            text: "Title"
            color: "#7f0000"
            Layout.alignment: Qt.AlignHCenter|Qt.AlignTop
            Behavior on x{
                NumberAnimation {
                    duration: 1000
                    //                    easing.type: Easing.OutElastic
                }
            }
        }