先看一个失败的案例,那黑色的就是主窗体,我已经找遍全网但依然是这样子。
下面贴上失败的代码
c++代码
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQuickWindow>
int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
const QUrl url(QStringLiteral("qrc:/main.qml"));
QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
&app, [url](QObject *obj, const QUrl &objUrl) {
if (!obj && url == objUrl)
QCoreApplication::exit(-1);
}, Qt::QueuedConnection);
engine.load(url);
return app.exec();
}
QML代码
import QtQuick 2.13
import QtQuick.Window 2.13
Window {
visible: true
width: 640
height: 480
flags: Qt.FramelessWindowHint
title: qsTr("Hello World")
color: "transparent"
Rectangle{
anchors.fill:parent
anchors.margins: 30
radius:30
opacity:1
color: "white"
}
}
后来在浩瀚的搜索结果里翻到第10页左右的时候找到了一篇帖子中提到了一个属性,在main.cpp内加上这行代码以后就OK了。
//QQuickWindow::setSceneGraphBackend(QSGRendererInterface::Software);