1.头文件

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <QFontDialog>
#include <QFont>
#include <QMessageBox>
#include <QDebug>
#include <QColorDialog>
#include <QColor>
#include <QFileDialog>
#include <QFile>
#include <QKeyEvent>      //键盘事件处理类的头文件
#include <QDebug>
#include <QMouseEvent>
#include <QTimerEvent>
#include <QTime>
#include <QTextToSpeech>
#include <QVoice>
 
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
 
class Widget : public QWidget
{
    Q_OBJECT
 
public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
 
private slots:
 
 
    void on_pushButton_clicked();
 
    void on_pushButton_2_clicked();
    //重写定时器处理函数
    void timerEvent(QTimerEvent *e);
 
private:
    Ui::Widget *ui;
    int timer_id;       //定时器的id号
 
       QTextToSpeech *s;
};
#endif // WIDGET_H

2.源文件

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    timer_id=0;
    s = new QTextToSpeech(this);
    connect(this,SIGNAL(clicked),this,SLOT(my_slot));
}
 
Widget::~Widget()
{
    delete ui;
}
 
 
void Widget::on_pushButton_clicked()
{
    timer_id = this->startTimer(1000);
}
 
void Widget::on_pushButton_2_clicked()
{
    this->killTimer(timer_id);
}
 
void Widget::timerEvent(QTimerEvent *e)
{
    if(e->timerId() == timer_id)
     {
         QString userInputTime = ui->lineEdit->text();
         QTime sys_t = QTime::currentTime();  //获取系统时间
         //将QTime类对象转换为字符串
         QString t = sys_t.toString("hh:mm:ss");
         ui->label->setText(t);
 
         if(t == userInputTime)
         {
             //QMessageBox::information(this,"成功","时间匹配成功");
             qDebug()<<"时间匹配成功";
             s->say(ui->textEdit->toPlainText());
             this->killTimer(timer_id);
             timer_id=0;
         }
     }
}

二 、保存

1.头文件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
#include <QFontDialog>
#include <QMessageBox>
#include <QFont>
#include <QDebug>
#include <QColorDialog>
#include <QColor>
#include <QFileDialog>
#include <QFile>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
 
private slots:
    void on_pushButton_clicked();
 
    void on_pushButton_2_clicked();
 
    void on_pushButton_3_clicked();
 
    void on_pushButton_4_clicked();
 
private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H

2.源文件

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
//字体按钮槽函数
void MainWindow::on_pushButton_clicked()
{
    bool ok;    //返回用户是否选中字体
    //调用getFont获取字体对话框函数
    QFont f = QFontDialog::getFont(&ok,
                         QFont("隶属",10,10,false)
                         ,this,
                         "选择字体");
    if(ok)
    {
        //ui->textEdit->setFont(f);
        ui->textEdit->setCurrentFont(f);
    }else
    {
        QMessageBox::information(this,"取消","用户取消");
    }
}
//颜色按钮
void MainWindow::on_pushButton_2_clicked()
{
    QColor c = QColorDialog::getColor(QColor("pink"),
                                      this,
                                      "选择颜色");
    if(c.isValid())
    {
        ui->textEdit->setTextBackgroundColor(c);
    }else
    {
        QMessageBox::information(this,"取消","用户取消");
    }
}
 
void MainWindow::on_pushButton_3_clicked()
{
        QString filename = QFileDialog::getOpenFileName(this,
                                                        "选择文件",
                                                        "./",
                                                        "ALL(*.*);;Images(*.png *.xpm *.jpg);;Text files(*.txt);;XML files(*.xml)");
        if(filename.isNull())
        {
            QMessageBox::information(this,"提示","用户取消");
            return;
        }
        qDebug()<<filename; //得到文件路径
 
        QFile file(filename);
        if(!file.isOpen())
        {
            if(!file.open(QFile::ReadWrite))
            {
                QMessageBox::critical(this,"失败","文件打开失败");
                return;
            }
        }
        QByteArray msg = file.readAll();
        file.close();
        ui->textEdit->setText(msg);
}
 
void MainWindow::on_pushButton_4_clicked()
{
    QString f = QFileDialog::getSaveFileName(this,
                                               "保存文件",
                                               "./",
                                               "ALL(*.*);;"
                                               "Text files(*.txt);;"
                                               "Images(*.png,*.jpg)");
      if(f.isNull())
      {
          QMessageBox::information(this,"提示","用户取消保存文件");
          return;
      }
      QFile file(f);
      if(!file.open(QIODevice::WriteOnly | QIODevice::Text))
      {
          QMessageBox::critical(this,"错误","无法打开文件进行保存");
      }
      QString textToSave = ui->textEdit->toPlainText();
      QTextStream out(&file);
      out<<textToSave;
      file.close();
      QMessageBox::information(this,"提示","文件保存成功");

}