[提问]代码提示ASSERT failure in QList <T> ::take: "index out of range"，求教！！！！ [复制链接]

void testTXT::readTXT()
{
        ui.tableWidget->clearContents();
    QFile file("D:/codes/birdTest/testTXT/testTXT/test.txt");

        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        {
                return;
         }
        QTextStream in(&file);

         QChar ch;
         int countLine = 0;
         while (!in.atEnd())
         {
                         in>>ch;
                                 if (ch == '\n')
                                 {
                                         countLine++;
                                 }        
         }


        for (int row = 0; row < ui.tableWidget->rowCount(); ++row)
        {                  
            QString line = in.readLine();

                         for (int column = 0; column < 3; ++column)
                        {                                        
                            QStringList fields = line.split(" ");
                                QTableWidgetItem *item0 = new QTableWidgetItem(fields.takeAt(column));

                ui.tableWidget->setItem(row, column, item0);
                         }
                }

}

代码提示：ASSERT failure in QList <T> ::take: "index out of range"
请问是哪里出错呢？？

输出QString line = in.readLine();里的line看看里面有什么，光看代码估计是空的。
QStringList fields = line.split(" ");   fields也是空的
QTableWidgetItem *item0 = new QTableWidgetItem(fields.takeAt(column));  takeat无法完成，出错
问题在
while (!in.atEnd())
         {
                         in>>ch;
                                 if (ch == '\n')
                                 {
                                         countLine++;
                                 }        
         }
这段代码运行完了，就到了文件尾，后面读不出来什么了。
加上file.seek（0）；

嗯嗯，确实如此！！

顺便问问，如何才能清空一个TXT文档里面的内容呢？？

菜鸟一名，还望赐教！！