QT 读取txt文件的几种方法
废话不说直接上代码
１．
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QString
displayString;
QFile
file("/home/alvin/text.txt");
if(!file.open(QIODevice::ReadOnly
| QIODevice::Text))
{
qDebug()<<"Can't
open the file!"<<endl;
}
while(!file.atEnd())
{
QByteArray
line = file.readLine();
QString
str(line);
qDebug()<<
str;
displayString.append(str);
}
ui->textEdit->clear();
ui->textEdit->setPlainText(displayString);
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２．
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QString
displayString;
QFile
file("/home/alvin/text.txt");
if (!file.open(QIODevice::ReadOnly
| QIODevice::Text))
return;
QTextStream
in(&file);
QString
line = in.readLine();
while (!line.isNull())
{
//
process_line(line);
line
= in.readLine();
displayString.append(line);
}
ui->textEdit->clear();
ui->textEdit->setPlainText(displayString);
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３．
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QString
displayString;
QFile
file("/home/alvin/text.txt");
if(!file.open(QIODevice::ReadWrite
| QIODevice::Text)) {
qDebug()<<"Can't
open the file!"<<endl;
}
QTextStream
stream(&file);
QString
line_in;
stream.seek(file.size());//将当前读取文件指针移动到文件末尾
int count
= 0;
while(count
< 10)
{
stream
<< QObject::trUtf8("新建行:")
<<++count<<"/n";
}
stream.seek(0);//将当前读取文件指针移动到文件开始
while(
!stream.atEnd())
{
line_in
= stream.readLine();
displayString.append(line_in);
qDebug()
<< line_in;
}
ui->textEdit->clear();
ui->textEdit->setPlainText(displayString);
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以上是三种ＱＴ读取文件的方法，
源码在这里自行下载查看
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https://pan.baidu.com/s/1pKIwzHL
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