Qt创建和删除文件小Demo（顺便讲了补全功能）

背景&＃xff1a;笔者需要创建和删除多个pdd和多个pff文件&＃xff08;这些是自己创建的类型&＃xff09;&＃xff0c;一个个手动创建和删除很麻烦&＃xff0c;就做了一款小软件解决此问题。

先看一下效果&＃xff1a;

代码如下&＃xff1a;

①、头文件&＃xff1a;

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
#include
#include
#include
#include
#include
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent &＃61; 0);
    ~MainWindow();
private slots:
    void on_pushButtonAdd_clicked();
    void on_pushButtonDel_clicked();
private:
    bool isFailAddFile();
    bool createFile();
    void fileFilter();
private:
    Ui::MainWindow *ui;
    QDir *m_tempDir;
    QString m_dirString;
    QCompleter *m_completer;
};
#endif // MAINWINDOW_H

②、源文件&＃xff1a;

#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->setFixedSize(485,90);
    m_dirString &＃61; "CreatePddOrPff";
    m_tempDir &＃61; new QDir;
    m_tempDir->mkdir(m_dirString);
    fileFilter();
}
MainWindow::~MainWindow()
{
    delete ui;
    delete m_tempDir;
}
void MainWindow::on_pushButtonAdd_clicked()
{
    if(createFile()){
        QMessageBox::information(this,"Success","File is creating.");
    }
}
void MainWindow::on_pushButtonDel_clicked()
{
    if(QFile::remove(QString(m_dirString).append("/").append(ui->lineEditDel->text()))){
        QMessageBox::information(this,"Success","File is removing.");
        ui->lineEditDel->setText("");
    }
    else{
        QMessageBox::information(this,"Fail","File is not exists.");
    }
}
bool MainWindow::isFailAddFile()
{
    if(ui->lineEditAdd->text().isEmpty()){
        QMessageBox::information(this,"Fail","File is Empty.");
    }
    return !ui->lineEditAdd->text().isEmpty();
}
bool MainWindow::createFile()
{
    QFile file(QString(m_dirString).append("/").append(ui->lineEditAdd->text()).append(".").append(ui->comboBox->currentText()));
    if(isFailAddFile()){
        file.open(QIODevice::WriteOnly);
        file.close();
        fileFilter();
    }
    return file.exists();
}
void MainWindow::fileFilter()
{
    QStringList filter;
    QDir dir(m_dirString);
    dir.setFilter(QDir::Files|QDir::Hidden|QDir::NoSymLinks);
    filter <<"*.p*";
    m_tempDir->setNameFilters(filter);
    QFileInfoList infoList &＃61; dir.entryInfoList();
    for(int i &＃61; 0; i         filter.append(infoList.at(i).fileName());
    }
    m_completer &＃61; new QCompleter(filter,this);
    m_completer->setCaseSensitivity(Qt::CaseInsensitive);
    ui->lineEditDel->setCompleter(m_completer);
}

③、ui文件&＃xff1a;