1、getOpenFileName獲取打開文件名字的使用案例
void myWidget::on_getOpenFileName_clicked()
{
// 參數3:".":代表根目錄
QString fileName = QFileDialog::getOpenFileName(this,tr("打開文件"),".",tr("文本文件(*.txt)"));
if (!fileName.isEmpty())
{
QFile file(fileName);
if (file.open(QFile::ReadOnly | QFile::Text))
{
QTextStream fileStream(&file);
QString reads;
reads.clear();
while (!fileStream.atEnd())
{
reads += fileStream.readLine();
}
file.close();
QMessageBox::about(this,tr("讀取文件"),reads);
}
}
}
2:、getSaveFileName獲取保存文件名的使用案例
void myWidget::on_getSaveFileName_clicked()
{
QString writes("你好,Qt\r\n保存成功");
QString defaultName = tr("文件名%1").arg(QDateTime::currentDateTime().toString("yyyy-MM-dd-hh-mm-ss"));
// 參數3:直接使用文件名字作爲路徑
QString fileName = QFileDialog::getSaveFileName(this,tr("保存文件"),defaultName,tr("文本文件(*.txt)"));
if (!fileName.isEmpty())
{
QFile file(fileName);
if (file.open(QFile::WriteOnly | QFile::Text))
{
QTextStream fileStream(&file);
int index = 0;
while (index < writes.length())
{
fileStream << writes[index];
++index;
}
file.close();
QMessageBox::about(this,tr("保存"),tr("保存成功"));
}
}
}
3、getExistingDirectory獲取存在的路徑
void myWidget::on_getExistingDirectory_clicked()
{
// 第三個參數QString():爲根目錄
QString directory = QFileDialog::getExistingDirectory(this,tr("get directory"),QString(),\
QFileDialog::ShowDirsOnly);
qDebug() << "getExistingDirectory:" << directory;
}
qDebug()輸出:getExistingDirectory: "E:/"