定位器

import QtQuick 2.6
import QtQuick.Window 2.2
import QtQuick.Controls 2.1

Window {
    id:mainwindow
    visible: true
    width: 400
    height: 600

    Row{
        Rectangle{
            width:20;
            height:20;
            color:"red";
        }
        Rectangle{
            width:20;
            height:20;
            color:"blue";
        }
        Rectangle{
            width:20;
            height:20;
            color:"green";
        }
    }
}