QWidget中加载QML页面并设置透明背景

要在QWidget中加载QML页面首先要用到一个很重要的类QQuickWidget

示例：

= new QQuickWidget(this);
    m_pQuickWidget->setFixedSize(1131,586);
    m_pQuickWidget->setAttribute(Qt::WA_AlwaysStackOnTop);
    m_pQuickWidget->setClearColor(QColor(Qt::transparent));
    m_pQuickWidget->setSource(QUrl(QStringLiteral("qrc:/UI/Viewer.qml")));
    m_pQuickWidget->rootObject()->setWidth(1131);
    m_pQuickWidget->rootObject()->setHeight(586);
    m_pQuickWidget->move(this->width()/2.0 - m_pQuickWidget->width()/2.0,342);
    m_pQuickWidget->show();

设置透明，最关键的一句

m_pQuickWidget->setClearColor(QColor(Qt::transparent));