qt创建4个共享内存并存入图片

以下是一个示例代码，创建4个共享内存并存入不同的图片：

#include <QApplication>
#include <QSharedMemory>
#include <QBuffer>
#include <QImage>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    // 创建4个共享内存对象
    QSharedMemory sharedMemory1("ImageMemory1");
    QSharedMemory sharedMemory2("ImageMemory2");
    QSharedMemory sharedMemory3("ImageMemory3");
    QSharedMemory sharedMemory4("ImageMemory4");

    // 如果共享内存已经存在，则先删除
    if (sharedMemory1.attach()) {
        sharedMemory1.detach();
    }
    if (sharedMemory2.attach()) {
        sharedMemory2.detach();
    }
    if (sharedMemory3.attach()) {
        sharedMemory3.detach();
    }
    if (sharedMemory4.attach()) {
        sharedMemory4.detach();
    }

    // 创建共享内存并将图片存入其中
    QImage image1("test1.png");
    QBuffer buffer1;
    buffer1.open(QIODevice::ReadWrite);
    image1.save(&buffer1, "PNG");
    char *data1 = static_cast<char *>(sharedMemory1.data());
    if (!sharedMemory1.create(buffer1.size())) {
        qDebug() << "Failed to create shared memory 1!";
        return 1;
    }
    memcpy(data1, buffer1.data().data(), buffer1.size());

    QImage image2("test2.png");
    QBuffer buffer2;
    buffer2.open(QIODevice::ReadWrite);
    image2.save(&buffer2, "PNG");
    char *data2 = static_cast<char *>(sharedMemory2.data());
    if (!sharedMemory2.create(buffer2.size())) {
        qDebug() << "Failed to create shared memory 2!";
        return 1;
    }
    memcpy(data2, buffer2.data().data(), buffer2.size());

    QImage image3("test3.png");
    QBuffer buffer3;
    buffer3.open(QIODevice::ReadWrite);
    image3.save(&buffer3, "PNG");
    char *data3 = static_cast<char *>(sharedMemory3.data());
    if (!sharedMemory3.create(buffer3.size())) {
        qDebug() << "Failed to create shared memory 3!";
        return 1;
    }
    memcpy(data3, buffer3.data().data(), buffer3.size());

    QImage image4("test4.png");
    QBuffer buffer4;
    buffer4.open(QIODevice::ReadWrite);
    image4.save(&buffer4, "PNG");
    char *data4 = static_cast<char *>(sharedMemory4.data());
    if (!sharedMemory4.create(buffer4.size())) {
        qDebug() << "Failed to create shared memory 4!";
        return 1;
    }
    memcpy(data4, buffer4.data().data(), buffer4.size());

    return a.exec();
}

这个示例代码创建了4个名为"ImageMemory1"、"ImageMemory2"、"ImageMemory3"、"ImageMemory4"的共享内存，并将4张不同的图片存入其中。你可以根据需要修改代码并存入你自己的图片。