Qt 文件目录操作

Qt 文件目录操作

QDir 类提供访问系统目录结构

QDir 类提供对目录结构及其内容的访问。QDir 用于操作路径名、访问有关路径和文件的信息以及操作底层文件系统。它还可以用于访问 Qt 的资源系统。

Qt 使用“/”作为通用目录分隔符，与“/”在 URL 中用作路径分隔符的方式相同。如果您总是使用“/”作为目录分隔符，Qt 将转换您的路径以符合底层操作系统。

QDir 可以使用相对路径或绝对路径指向文件。绝对路径以目录分隔符开头(在 Windows 下，可以选择以驱动器规格开头)。相对文件名以目录名或文件名开头，并指定相对于当前目录的路径。

下面是QDir的一些常用方法：

1. 构造函数：QDir(const QString &path = QString())
2. 判断路径是否存在：bool exists() const;
3. 判断是否是文件：bool isFile() const;
4. 判断是否是文件夹：bool isDir() const;
5. 获取当前路径：QString absolutePath() const;
6. 获取文件名：QString fileName() const;
7. 获取文件目录：QString dirName() const;
8. 获取文件大小：qint64 size() const;
9. 获取文件的创建时间：QDateTime created() const;
10. 获取文件的最后修改时间：QDateTime lastModified() const;

main函数 main.cpp 文件：

#include "sample7_3QDirFile.h"
#include <QtWidgets/QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);QCoreApplication::setOrganizationName("China University of Petroleum");sample7_3QDirFile w;w.show();return a.exec();
}

sample7_3QDirFile.h 文件

#pragma once#include <QtWidgets/QDialog>
#include "ui_sample7_3QDirFile.h"#include   <QFileSystemWatcher>namespace Ui {class sample7_3QDirFile;
}class sample7_3QDirFile : public QDialog
{Q_OBJECTpublic:sample7_3QDirFile(QWidget *parent = Q_NULLPTR);~sample7_3QDirFile();private:Ui::sample7_3QDirFileClass *ui;public slots:void on_directoryChanged(const QString path);void on_fileChanged(const QString path);private:QFileSystemWatcher  fileWatcher;void showBtnInfo(QObject* btn);private slots:///--------QCoreApplication类---------------void on_pushButton_clicked();void on_pushButton_2_clicked();void on_pushButton_3_clicked();void on_pushButton_4_clicked();void on_pushButton_5_clicked();void on_pushButton_6_clicked();///--------QFile类-文件操作---------------void on_pushButton_7_clicked();void on_pushButton_8_clicked();void on_pushButton_9_clicked();void on_pushButton_10_clicked();void on_pushButton_11_clicked();void on_pushButton_12_clicked();void on_pushButton_13_clicked();void on_pushButton_14_clicked();///--------QFileInfo类 - 文件信息---------------void on_pushButton_15_clicked();void on_pushButton_16_clicked();void on_pushButton_17_clicked();void on_pushButton_18_clicked();void on_pushButton_19_clicked();void on_pushButton_20_clicked();void on_pushButton_21_clicked();void on_pushButton_22_clicked();void on_pushButton_23_clicked();void on_pushButton_24_clicked();void on_pushButton_25_clicked();void on_pushButton_26_clicked();void on_pushButton_27_clicked();void on_pushButton_28_clicked();void on_pushButton_29_clicked();void on_pushButton_30_clicked();void on_pushButton_31_clicked();void on_pushButton_32_clicked();///--------QDir类-目录操作---------------void on_pushButton_33_clicked();void on_pushButton_34_clicked();void on_pushButton_35_clicked();void on_pushButton_36_clicked();void on_pushButton_37_clicked();void on_pushButton_38_clicked();void on_pushButton_39_clicked();void on_pushButton_40_clicked();void on_pushButton_41_clicked();void on_pushButton_42_clicked();void on_pushButton_43_clicked();void on_pushButton_44_clicked();void on_pushButton_45_clicked();void on_pushButton_46_clicked();void on_pushButton_47_clicked();void on_pushButton_48_clicked();void on_pushButton_49_clicked();void on_pushButton_50_clicked();void on_pushButton_51_clicked();void on_pushButton_52_clicked();///--------QTemporaryDir和QTemporaryFile---------------void on_pushButton_53_clicked();void on_pushButton_54_clicked();///--------QFileSystemWatcher类---------------void on_pushButton_55_clicked();void on_pushButton_56_clicked();void on_pushButton_57_clicked();void on_pushButton_58_clicked();//打开文件void on_pushButton_59_clicked();void on_pushButton_60_clicked();void on_pushButton_61_clicked();};

sample7_3QDirFile.cpp 文件：

#include "sample7_3QDirFile.h"#include    <QFileDialog>
#include    <QDateTime>
#include    <QTemporaryDir>
#include    <QTemporaryFile>//解决QT中中文显示乱码问题
#pragma execution_character_set("utf-8")sample7_3QDirFile::sample7_3QDirFile(QWidget *parent): QDialog(parent)
{ui->setupUi(this);this->setWindowFlags(Qt::Window);
}
sample7_3QDirFile::~sample7_3QDirFile()
{delete ui;
}//显示btn的信息
void sample7_3QDirFile::showBtnInfo(QObject *btn)
{ QPushButton *theBtn = static_cast<QPushButton*>(btn);ui->plainTextEdit->appendPlainText(theBtn->text());ui->plainTextEdit->appendPlainText(theBtn->toolTip() + "\n");
}//directoryChanged()信号的槽函数
void sample7_3QDirFile::on_directoryChanged(const QString path)
{ui->plainTextEdit->appendPlainText(path);ui->plainTextEdit->appendPlainText("目录发生了变化\n");
}//fileChanged()信号的槽函数
void sample7_3QDirFile::on_fileChanged(const QString path)
{ui->plainTextEdit->appendPlainText(path);ui->plainTextEdit->appendPlainText("文件发生了变化\n");
}///--------QCoreApplication类---------------
void sample7_3QDirFile::on_pushButton_clicked()
{showBtnInfo(sender());QString str = QCoreApplication::applicationDirPath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_2_clicked()
{showBtnInfo(sender());QString str = QCoreApplication::applicationFilePath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_3_clicked()
{showBtnInfo(sender());QString str = QCoreApplication::applicationName();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_4_clicked()
{showBtnInfo(sender());QStringList strList = QCoreApplication::libraryPaths();for (int i = 0; i < strList.count(); i++){ui->plainTextEdit->appendPlainText(strList.at(i));}ui->plainTextEdit->appendPlainText("");
}void sample7_3QDirFile::on_pushButton_5_clicked()
{showBtnInfo(sender());QString str = QCoreApplication::organizationName();ui->plainTextEdit->appendPlainText(str + "\n");}void sample7_3QDirFile::on_pushButton_6_clicked()
{QCoreApplication::exit();
}///--------QFile类-文件操作---------------
void sample7_3QDirFile::on_pushButton_7_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFileInfo   fileInfo(sous);//QString newFile = fileInfo.path() + "/" + fileInfo.baseName() + "--副本." + fileInfo.suffix();QFile::copy(sous, newFile);ui->plainTextEdit->appendPlainText("源文件：" + sous);ui->plainTextEdit->appendPlainText("复制为文件：" + newFile + "\n");
}void sample7_3QDirFile::on_pushButton_8_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件bool the = QFile::exists(sous);if (the){ui->plainTextEdit->appendPlainText(+"true \n");}else{ui->plainTextEdit->appendPlainText(+"false \n");}
}void sample7_3QDirFile::on_pushButton_9_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFile::remove(sous);ui->plainTextEdit->appendPlainText("删除文件：" + sous + "\n");
}
//QFile::rename()
void sample7_3QDirFile::on_pushButton_10_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFileInfo   fileInfo(sous);//源文件信息QString newFile = fileInfo.path() + "/" + fileInfo.baseName() + ".XYZ"; //更改文件后缀为".XYZ"QFile::rename(sous, newFile); //重命名文件ui->plainTextEdit->appendPlainText("源文件：" + sous);ui->plainTextEdit->appendPlainText("重命名为：" + newFile + "\n");
}void sample7_3QDirFile::on_pushButton_11_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFile   file(sous);QFileInfo   fileInfo(sous);//QString newFile = fileInfo.path() + "/" + fileInfo.baseName() + "--副本." + fileInfo.suffix();file.copy(newFile);ui->plainTextEdit->appendPlainText("源文件：" + sous);ui->plainTextEdit->appendPlainText("复制为文件：" + newFile + "\n");
}void sample7_3QDirFile::on_pushButton_12_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFile   file(sous);bool the = file.exists();if (the)ui->plainTextEdit->appendPlainText(+"true \n");elseui->plainTextEdit->appendPlainText(+"false \n");
}void sample7_3QDirFile::on_pushButton_13_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFile   file(sous);file.remove();ui->plainTextEdit->appendPlainText("删除文件：" + sous + "\n");
}//QFile.rename()
void sample7_3QDirFile::on_pushButton_14_clicked()
{showBtnInfo(sender());QString sous = ui->editFile->text(); //源文件QFile   file(sous); //源文件对象QFileInfo   fileInfo(sous);//源文件信息QString newFile = fileInfo.path() + "/" + fileInfo.baseName() + ".XYZ"; //修改文件后缀为“.XYZ”file.rename(newFile); //重命名文件ui->plainTextEdit->appendPlainText("源文件：" + sous);ui->plainTextEdit->appendPlainText("重命名为：" + newFile + "\n");
}///--------QFileInfo类 - 文件信息---------------
//QFileInfo::absoluteFilePath()
void sample7_3QDirFile::on_pushButton_15_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.absoluteFilePath();ui->plainTextEdit->appendPlainText(str + "\n");
}
//QFileInfo::absolutePath()
void sample7_3QDirFile::on_pushButton_16_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.absolutePath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_17_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.fileName();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_18_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.filePath();ui->plainTextEdit->appendPlainText(str + "\n");
}//QFileInfo.size()
void sample7_3QDirFile::on_pushButton_19_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());qint64  dt = fileInfo.size();QString  str = QString("%1 Bytes").arg(dt);ui->plainTextEdit->appendPlainText(str + "\n");
}//QFileInfo.path()
void sample7_3QDirFile::on_pushButton_20_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.path();ui->plainTextEdit->appendPlainText(str + "\n");
}//QFileInfo.basename()
void sample7_3QDirFile::on_pushButton_21_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.baseName();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_22_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.completeBaseName();ui->plainTextEdit->appendPlainText(str + "\n");}void sample7_3QDirFile::on_pushButton_23_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.suffix();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_24_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QString  str = fileInfo.completeSuffix();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_25_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editDir->text());bool  the = fileInfo.isDir();if (the)ui->plainTextEdit->appendPlainText(+"true \n");elseui->plainTextEdit->appendPlainText(+"false \n");
}void sample7_3QDirFile::on_pushButton_26_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());bool  the = fileInfo.isFile();if (the)ui->plainTextEdit->appendPlainText(+"true \n");elseui->plainTextEdit->appendPlainText(+"false \n");
}void sample7_3QDirFile::on_pushButton_27_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());bool  the = fileInfo.isExecutable();if (the)ui->plainTextEdit->appendPlainText(+"true \n");elseui->plainTextEdit->appendPlainText(+"false \n");
}void sample7_3QDirFile::on_pushButton_28_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QDateTime  dt = fileInfo.created();QString  str = dt.toString("yyyy-MM-dd hh:mm:ss");ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_29_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QDateTime  dt = fileInfo.lastModified();QString  str = dt.toString("yyyy-MM-dd hh:mm:ss");ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_30_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());QDateTime  dt = fileInfo.lastRead();QString  str = dt.toString("yyyy-MM-dd hh:mm:ss");ui->plainTextEdit->appendPlainText(str + "\n");
}//静态函数exists()
void sample7_3QDirFile::on_pushButton_31_clicked()
{showBtnInfo(sender());bool  the = QFileInfo::exists(ui->editFile->text());if (the)ui->plainTextEdit->appendPlainText(+"true \n");elseui->plainTextEdit->appendPlainText(+"false \n");}
void sample7_3QDirFile::on_pushButton_32_clicked()
{showBtnInfo(sender());QFileInfo  fileInfo(ui->editFile->text());bool  the = fileInfo.exists();if (the)ui->plainTextEdit->appendPlainText(+"true \n");elseui->plainTextEdit->appendPlainText(+"false \n");
}///--------QDir类-目录操作---------------
void sample7_3QDirFile::on_pushButton_33_clicked()
{showBtnInfo(sender());QString  str = QDir::tempPath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_34_clicked()
{showBtnInfo(sender());QString  str = QDir::rootPath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_35_clicked()
{showBtnInfo(sender());QString  str = QDir::homePath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_36_clicked()
{showBtnInfo(sender());QFileInfoList  strList = QDir::drives();for (int i = 0; i < strList.count(); i++){ui->plainTextEdit->appendPlainText(strList.at(i).path());}ui->plainTextEdit->appendPlainText("\n");
}void sample7_3QDirFile::on_pushButton_37_clicked()
{showBtnInfo(sender());QString  str = QDir::currentPath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_38_clicked()
{showBtnInfo(sender());QDir::setCurrent(ui->editDir->text());QString  str = QDir::currentPath();ui->editDir->setText(str);ui->plainTextEdit->appendPlainText("设置当前路径为：" + str + "\n");
}
//-----文件和目录操作------
void sample7_3QDirFile::on_pushButton_39_clicked()
{showBtnInfo(sender());QString subDir = "subdir1";QDir    dir(ui->editDir->text());bool   ok = dir.mkdir(subDir);if (ok){ui->plainTextEdit->appendPlainText("所选目录下成功新建一个目录 " + subDir + "\n");}else{ui->plainTextEdit->appendPlainText("创建目录失败\n");}
}
void sample7_3QDirFile::on_pushButton_40_clicked()
{showBtnInfo(sender());QString sous(ui->editDir->text());QDir    dir(sous);bool   ok = dir.rmdir(sous);if (ok){ui->plainTextEdit->appendPlainText("成功删除所选目录\n" + sous + "\n");}else{ui->plainTextEdit->appendPlainText("删除失败\n");}
}
void sample7_3QDirFile::on_pushButton_41_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QString sous(ui->editFile->text());bool ok = dir.remove(sous);if (ok){ui->plainTextEdit->appendPlainText("删除文件:" + sous + "\n");}else{ui->plainTextEdit->appendPlainText("删除文件失败\n");}
}
void sample7_3QDirFile::on_pushButton_42_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QString sous = ui->editFile->text(); //源文件QFileInfo   fileInfo(sous);//QString newFile = fileInfo.path() + "/" + fileInfo.baseName() + ".XYZ";dir.rename(sous, newFile);ui->plainTextEdit->appendPlainText("源文件：" + sous);ui->plainTextEdit->appendPlainText("重命名为：" + newFile + "\n");
}
void sample7_3QDirFile::on_pushButton_43_clicked()
{showBtnInfo(sender());QString curDir = QDir::currentPath();QDir    lastDir(curDir);ui->plainTextEdit->appendPlainText("选择目录之前：" + lastDir.absolutePath());QString aDir = QFileDialog::getExistingDirectory(this, "选择一个目录", curDir, QFileDialog::ShowDirsOnly);if (aDir.isEmpty()){return;}ui->editDir->setText(aDir);lastDir.setPath(aDir);ui->plainTextEdit->appendPlainText("选择目录之后：" + lastDir.absolutePath() + "\n");
}
void sample7_3QDirFile::on_pushButton_44_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());bool ok = dir.removeRecursively();if (ok){ui->plainTextEdit->appendPlainText("删除目录及文件成功\n");}else{ui->plainTextEdit->appendPlainText("删除目录及文件失败\n");}
}//-----文件或目录信息------
void sample7_3QDirFile::on_pushButton_45_clicked()
{//absoluteFilePath()，showBtnInfo(sender());QDir    dir(ui->editDir->text());QString  str = dir.absoluteFilePath(ui->editFile->text());ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_46_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QString  str = dir.absolutePath();ui->plainTextEdit->appendPlainText(str + "\n");}void sample7_3QDirFile::on_pushButton_47_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QString  str = dir.canonicalPath();ui->plainTextEdit->appendPlainText(str + "\n");
}void sample7_3QDirFile::on_pushButton_48_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QString  str = dir.filePath(ui->editFile->text());ui->plainTextEdit->appendPlainText(str + "\n");}
void sample7_3QDirFile::on_pushButton_49_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());bool  the = dir.exists();if (the)ui->plainTextEdit->appendPlainText("true \n");elseui->plainTextEdit->appendPlainText("false \n");
}
void sample7_3QDirFile::on_pushButton_50_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QString  str = dir.dirName();ui->plainTextEdit->appendPlainText(str + "\n");
}
//列出子目录
void sample7_3QDirFile::on_pushButton_51_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QStringList strList = dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot);ui->plainTextEdit->appendPlainText("所选目录下的所有目录:");for (int i = 0; i < strList.count(); i++){ui->plainTextEdit->appendPlainText(strList.at(i));}ui->plainTextEdit->appendPlainText("\n");}
//列出所有文件
void sample7_3QDirFile::on_pushButton_52_clicked()
{showBtnInfo(sender());QDir    dir(ui->editDir->text());QStringList strList = dir.entryList(QDir::Files);ui->plainTextEdit->appendPlainText("所选目录下的所有文件：");for (int i = 0; i < strList.count(); i++){ui->plainTextEdit->appendPlainText(strList.at(i));}ui->plainTextEdit->appendPlainText("\n");
}///--------QTemporaryDir和QTemporaryFile---------------
//QTemporaryDir
void sample7_3QDirFile::on_pushButton_53_clicked()
{showBtnInfo(sender());QTemporaryDir    dir;dir.setAutoRemove(true);ui->plainTextEdit->appendPlainText(dir.path() + "\n");
}
//QTemporaryFile
void sample7_3QDirFile::on_pushButton_54_clicked()
{showBtnInfo(sender());QTemporaryFile    aFile;aFile.setAutoRemove(true);aFile.open();ui->plainTextEdit->appendPlainText(aFile.fileName() + "\n");
}///--------QFileSystemWatcher类---------------
//开始监听,addPath()
void sample7_3QDirFile::on_pushButton_55_clicked()
{showBtnInfo(sender());ui->plainTextEdit->appendPlainText("监听目录：" + ui->editDir->text() + "\n");fileWatcher.addPath(ui->editDir->text());//添加监听目录fileWatcher.addPath(ui->editFile->text());//添加监听文件QObject::connect(&fileWatcher, &QFileSystemWatcher::directoryChanged,this, &sample7_3QDirFile::on_directoryChanged); //directoryChangedQObject::connect(&fileWatcher, &QFileSystemWatcher::fileChanged,this, &sample7_3QDirFile::on_fileChanged); //fileChanged
}
//停止监听,removePath()
void sample7_3QDirFile::on_pushButton_56_clicked()
{showBtnInfo(sender());ui->plainTextEdit->appendPlainText("停止监听目录：" + ui->editDir->text() + "\n");fileWatcher.removePath(ui->editDir->text());//fileWatcher.removePath(ui->editFile->text());//QObject::disconnect(&fileWatcher, &QFileSystemWatcher::directoryChanged,this, &sample7_3QDirFile::on_directoryChanged); //directoryChangedQObject::disconnect(&fileWatcher, &QFileSystemWatcher::fileChanged,this, &sample7_3QDirFile::on_fileChanged); //fileChanged
}
//显示监听目录,directories()
void sample7_3QDirFile::on_pushButton_57_clicked()
{showBtnInfo(sender());QStringList strList = fileWatcher.directories();for (int i = 0; i < strList.count(); i++){ui->plainTextEdit->appendPlainText(strList.at(i));}ui->plainTextEdit->appendPlainText("");}
//显示监听文件,files()
void sample7_3QDirFile::on_pushButton_58_clicked()
{showBtnInfo(sender());QStringList strList = fileWatcher.files();for (int i = 0; i < strList.count(); i++){ui->plainTextEdit->appendPlainText(strList.at(i));}ui->plainTextEdit->appendPlainText("");
}//打开文件
void sample7_3QDirFile::on_pushButton_59_clicked()
{QString curDir = QDir::currentPath();QString aFile = QFileDialog::getOpenFileName(this, "打开一个文件", curDir, "所有文件(*.*)");ui->editFile->setText(aFile);
}void sample7_3QDirFile::on_pushButton_60_clicked()
{QString curDir = QDir::currentPath();QString aDir = QFileDialog::getExistingDirectory(this, "选择一个目录", curDir, QFileDialog::ShowDirsOnly);ui->editDir->setText(aDir);
}void sample7_3QDirFile::on_pushButton_61_clicked()
{ui->plainTextEdit->clear();
}