[C++]Qt文本操作（按行读写）

资料来源：https://blog.csdn.net/flyfish1986/article/details/79487104 

#include <QDebug>
#include <QFile>

void ReadLine()
{

    QFile file("要读的文件路径");
    if (file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        while (!file.atEnd())
        {
            QByteArray line = file.readLine();
            QString str(line);
            qDebug() << str;
            displayString << str;
        }
        file.close();

    }
}

void WriteLine()
{

    QFile file("要写的文件路径");
    if (file.open(QIODevice::ReadWrite | QIODevice::Text))
    {
        QTextStream stream(&file);
        stream.seek(file.size());
        for (auto& i : displayString)
        {
            QString qs;
            qs.append("Content:");
            qs.append(i);
            qs.remove("
");
            stream << qs << "
";
        }
        file.close();
    }
}