Qt串口程序在另一个系统上运行时崩溃

Question

我在Windows 10 PC上修改了这段代码，它编译并运行时没有崩溃。

#include <QtSerialPort/QSerialPort>

#include <QTextStream>
#include <QCoreApplication>
#include <QFile>
#include <QStringList>

QT_USE_NAMESPACE

int main(int argc, char *argv[])
{
    QCoreApplication coreApplication(argc, argv);
    int argumentCount = QCoreApplication::arguments().size();
    QStringList argumentList = QCoreApplication::arguments();

    QTextStream standardOutput(stdout);

    if (argumentCount == 1) {
        standardOutput << QObject::tr("Usage: %1 <serialportname>     [baudrate]").arg(argumentList.first()) << endl;
        return 1;
    }

    QSerialPort serialPort;
    QString serialPortName = argumentList.at(1);
    serialPort.setPortName(serialPortName);

    int serialPortBaudRate = (argumentCount > 2) ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
    serialPort.setBaudRate(serialPortBaudRate);

    if (!serialPort.open(QIODevice::WriteOnly)) {
        standardOutput << QObject::tr("Failed to open port %1, error:     %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    QFile dataFile("C:\\SerialCommand.dat");
    if (!dataFile.open(QIODevice::ReadOnly)) {
        standardOutput << QObject::tr("Failed to open file for reading") <<     endl;
        return 1;
    }

    QByteArray writeData(dataFile.readAll());
    dataFile.close();

    if (writeData.isEmpty()) {
        standardOutput << QObject::tr("Either no data was currently available on the standard input for reading, or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    qint64 bytesWritten = serialPort.write(writeData);

    if (bytesWritten == -1) {
        standardOutput << QObject::tr("Failed to write the data to port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    } else if (bytesWritten != writeData.size()) {
        standardOutput << QObject::tr("Failed to write all the data to port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    } else if (!serialPort.waitForBytesWritten(5000)) {
        standardOutput << QObject::tr("Operation timed out or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    standardOutput << QObject::tr("Data successfully sent to port %1").arg(serialPortName) << endl;

    printf("\n\ntest");

    return 0;
}

我将Qt设置为发布模式，并使用以下.dll文件打包应用程序：

1. msvcp120d.dll
2. msvcr120d.dll
3. Qt5Core.dll
4. Qt5Cored.dll
5. Qt5SerialPort.dll
6. Qt5SerialPortd.dll
7. Qt5Widgets.dll
8. qwindows.dll

当我在另一个系统（也是Windows 10）上运行应用程序时，程序立即崩溃 - 是的，我确实将SerialCommand.dat移动到C驱动器上的正确位置。有什么想法吗？

Answer 1

您正在打包dll的调试版本（以d结尾）而不是发布版本。

阅读Qt deployment docs，特别是最后一部分（从“应用程序依赖关系”到最后）。

dependency walker有助于找到实际的依赖关系，理论上windeployqt应该自动完成使用您需要的所有文件创建发布目录的工作。

另请参阅此other question，但它适用于使用QML的应用，因此它比您的情况更复杂。