【转载】Qt6.2.4 qml ChartView 实现饼状图与问题解决

转载

• https://www.bilibili.com/video/BV1dS4y1u7vN?p=30&vd_source=64f1a4c05d797eb3cca1ef771fd46c22

环境

注意

如果直接在 qml 中使用 ChartView 项目编译不通过/编译失败，报错如下：

Error 20 (this feature has not been implemented yet) in function AVolute::GetProductInfoT::<lambda_3920e95365a48b95dd51020986e9e351>::operator ()
Error 20 (this feature has not been implemented yet) in function AVolute::GetProductInfoT::<lambda_3920e95365a48b95dd51020986e9e351>::operator ()

预览

正文

1. 需要在 .pro 文件中追加 charts

QT += quick charts

2. main.cpp 使用 QGuiApplication 初始化 app 会报错，需要切换为 QApplication

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QApplication>

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif
//    QGuiApplication app(argc, argv);
    QApplication 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();
}

3. 在 qml 文件中引入 QtCharts ，并使用 ChartView 绘制

import QtQuick 2.15
import QtQuick.Window 2.15
import QtCharts 2.0

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")


    ChartView {
        width: 400
        height: 300
        theme: ChartView.ChartThemeBrownSand
        antialiasing: true

        PieSeries {
            id: pieSeries
            PieSlice { label: "eaten"; value: 94.9 }
            PieSlice { label: "not yet eaten"; value: 5.1 }
        }
    }

}