QT作图问题，第一次运行正常，第二次崩溃

代码如下，画图是单独线程进行的，现在问题是第一次启动线程的时候是没有问题的，第二次程序就崩溃了

 void QTCurvePlotThread(LPVOID pParam)
{
    int argc = 1;
    char *argv[] = { "Qt" };
    static QApplication app(argc, argv);
    app.setQuitOnLastWindowClosed(true);

    QChart *charts[4] = { new QChart(), new QChart(), new QChart(), new QChart() };
    for(int k = 0; k < 8; k++)
    {
        //.. 向窗口中添加曲线
        QChart *chart = charts[k/2];

        QLineSeries *series = new QLineSeries();

        int offset = chart->series().count();
        for(int i = 0; i < 360; i++)
        {
            qreal x = offset * 20 + i;
            series->append(QPointF(i, qSin(2.0 * 3.141592 * x / 360.0)));
        }

        series->setName(QString("line " + QString::number(chart->series().size())));
        chart->addSeries(series);
        //.. 设置属性
        chart->setTitle("Zoom in/out example");
        chart->createDefaultAxes();
        chart->legend()->show();
        chart->legend()->setAlignment(Qt::AlignBottom);
        chart->setAnimationOptions(QChart::SeriesAnimations);
    }


    QSplitter *splitterMain = new QSplitter(Qt::Vertical, NULL/*app->widgetAt(0,0)*/);
    splitterMain->resize(720, 480);
    splitterMain->setOpaqueResize(true);
    splitterMain->setStretchFactor(1, 1);
    QChartView *view1 = new QChartView(charts[0], splitterMain);
    QChartView *view2 = new QChartView(charts[1], splitterMain);
    QChartView *view3 = new QChartView(charts[2], splitterMain);
    QChartView *view4 = new QChartView(charts[3], splitterMain);

    QGridLayout *m_mainLayout = new QGridLayout();
    m_mainLayout->addWidget(splitterMain, 0, 0, 1, 1);

    QWidget *window = new QWidget;
    window->setWindowTitle("CurvePloter");
    window->setLayout(m_mainLayout);
    window->show();


    app.exec();

    return;
}

1.从你的代码中没有看出问题来；
2.至于你说的第一次启动线程，没有看到你怎么启动的；
3.建议打几个断电，然后调试，看看程序时在那快奔溃了，这样也好找出问题；

目测是两次线程中使用了静态的app的问题。

验证了的确是static application的问题，我用qt creator实现一样的代码，多次启动时没问题的，代码如下：

#include "mainwindow.h"

#include <QApplication>

#include <Windows.h>
#include<SetupAPI.h>
#pragma comment(lib, "setupapi.lib")
#include <devguid.h>
#include<QDebug>
#include <string>
#include <iostream>
#include <QChart>
#include <QLineSeries>
#include<QtCharts>

std::string getComMonDevices();

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
//    MainWindow w;
//    getComMonDevices();
//    w.show();

//    argc = 1;
//    *argv[1] = { 0 };
//    static QApplication app(argc, argv);
    a.setQuitOnLastWindowClosed(true);

    QChart *charts[4] = { new QChart(), new QChart(), new QChart(), new QChart() };
    for(int k = 0; k < 8; k++)
    {
        //.. 向窗口中添加曲线
        QChart *chart = charts[k/2];

        QLineSeries *series = new QLineSeries();

        int offset = chart->series().count();
        for(int i = 0; i < 360; i++)
        {
            qreal x = offset * 20 + i;
            series->append(QPointF(i, qSin(2.0 * 3.141592 * x / 360.0)));
        }

        series->setName(QString("line " + QString::number(chart->series().size())));
        chart->addSeries(series);
        //.. 设置属性
        chart->setTitle("Zoom in/out example");
        chart->createDefaultAxes();
        chart->legend()->show();
        chart->legend()->setAlignment(Qt::AlignBottom);
        chart->setAnimationOptions(QChart::SeriesAnimations);
    }


    QSplitter *splitterMain = new QSplitter(Qt::Vertical, NULL/*app->widgetAt(0,0)*/);
    splitterMain->resize(720, 480);
    splitterMain->setOpaqueResize(true);
    splitterMain->setStretchFactor(1, 1);
    QChartView *view1 = new QChartView(charts[0], splitterMain);
    QChartView *view2 = new QChartView(charts[1], splitterMain);
    QChartView *view3 = new QChartView(charts[2], splitterMain);
    QChartView *view4 = new QChartView(charts[3], splitterMain);

    QGridLayout *m_mainLayout = new QGridLayout();
    m_mainLayout->addWidget(splitterMain, 0, 0, 1, 1);

    QWidget *window = new QWidget;
    window->setWindowTitle("CurvePloter");
    window->setLayout(m_mainLayout);
    window->show();


    return a.exec();
}