How does Qt handle binary data?

In Qt, binary data is typically handled using the QByteArray class. Here are some methods for working with binary data:

1. Create a QByteArray object to store binary data.

QByteArray byteArray;
byteArray.append(0x41); // 添加一个字节
byteArray.append("hello"); // 添加字符串

1. Read and write binary data:

// 读取二进制数据
QByteArray data;
QFile file("file.bin");
if (file.open(QIODevice::ReadOnly)) {
    data = file.readAll();
    file.close();
}

// 写入二进制数据
QByteArray data;
data.append(0x41);
data.append("hello");
QFile file("file.bin");
if (file.open(QIODevice::WriteOnly)) {
    file.write(data);
    file.close();
}

1. Read and write binary data using the QDataStream class.

// 读取二进制数据
QByteArray data;
QFile file("file.bin");
if (file.open(QIODevice::ReadOnly)) {
    QDataStream in(&file);
    in >> data;
    file.close();
}

// 写入二进制数据
QByteArray data;
data.append(0x41);
data.append("hello");
QFile file("file.bin");
if (file.open(QIODevice::WriteOnly)) {
    QDataStream out(&file);
    out << data;
    file.close();
}

These are some basic methods for handling binary data, and additional Qt classes and methods can be used based on specific requirements.