嵌入式学习-qt-Day4

嵌入式学习-qt-Day4

一、思维导图

二、作业

1.设计一个界面：显示系统时间；可以设置闹钟，在设置的时间到达后，显示五次字符串，并且语音播报。

Wight.h

#ifndef WIDGET_H
#define WIDGET_H
#include 
#include 
#include 
#include 
#include 

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
    void timerEvent(QTimerEvent *event) override;
    int t1;//定时器1
    int t2;//定时器2
private slots:
    void on_pushButton_clicked();
private:
    Ui::Widget *ui;
    QTextToSpeech *speech;//语音播报者
};
#endif // WIDGET_H

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Wight.cpp

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    t1 = startTimer(1000);//启动定时器t1
    speech = new QTextToSpeech(this); //实例化语音播报者
}

//定时器函数
void Widget::timerEvent(QTimerEvent *e)
{
    //系统时间
    if (e->timerId() == t1)
    {
        QTime sys_time = QTime::currentTime();
        QString s = sys_time.toString("hh:mm:ss");
        ui->sys_time->setText(s);
    }
    //闹钟
    if ((e->timerId() == t2))
    {
        for(int i = 0;i < 5; i++){
            ui->label->setText("好好学习天天向上");
            speech->say(ui->label->text());
        }
        killTimer(t2);//关闭定时器2
    }
}

Widget::~Widget()
{
    delete ui;
}
void Widget::on_pushButton_clicked()
{
    QTime sys_time = QTime::currentTime();
    QTime alarm_time = ui->timeEdit->time();
    int current_s = sys_time.hour()*3600 + sys_time.minute()*60 + sys_time.second();
    int alarm_s = alarm_time.hour()*3600 + alarm_time.minute()*60 + alarm_time.second();

    t2 = startTimer((alarm_s - current_s)*1000);//启动定时器2

    ui->label->setText("设置成功!");
}
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运行结果