在當前視窗的qml檔案中：nowShowWindow.qml

window
{
    id: inletSettingPanel
    title: "主視窗"
    minimumWidth: 270
    minimumHeight: 660

    Button
    {
        x: parent.x
        y: parent.y
        width: 30
        height: 15
        activeFocusOnTab: false
        text: "開啟新視窗"

        //可在此類中設定需要顯示的視窗的大小等屬性
 

        needShowWindow
        {
            id: needShowWindowPanel
        }

        onClicked:
        {
            needShowWindowPanel.show();
        }
    }
}

在當前視窗的qml檔案中：needShowWindow.qml

Window {
    id: inletSettingPanel
    title: "新視窗"
    minimumWidth: 270; minimumHeight: 660
}