qml中使⽤canvas绘制温度计⽹上只到⼀篇vip⽂章，没钱充会员，只能⾃⼰画了使⽤环境QT5.12.7main.qml代码如下// An highlighted blockimport QtQuick 2.12import QtQuick.Window 2.12Window {visible:truewidth:400height:680title:qsTr("Hello World")Re