QT改错，#include "widget.h" #include "ui_widget.h" #include <QTime> #include <QTimer> #include <QPixmap> #include <iostream> #include <string> #include <QDebug> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); this->count = 0; this->tm = new QTimer(this); this->tm->start(1000); this->ui->label_2->setText(QTime::currentTime().toString("yyyy-MM-dd hh:mm:ss")); QTime time(0,0,0,0); this->ui->timeNumber->display(time.toString("hh:mm:ss")); //初始化label QPixmap pic(":/images/1.jpg"); this->ui->label->setPixmap(pic); for (int i = 1; i <= 9; i ++){ QString file_path = ":/images/"; file_path = QString::number(i) + ".jpg"; ph_set.push_back(file_path); qDebug() << file_path << endl; } connect(this->tm,&QTimer::timeout,this,&Widget::update_tm); } Widget::~Widget() { delete ui; } void Widget::update_tm() { this->count ++; QTime time(0,0,0,0); this->ui->timeNumber->display(time.addSecs(count).toString("mm:ss")); this->ui->label_2->setText(QTime::currentTime().toString("hh:mm:ss")); } void Widget::on_beforeButton_clicked() { } void Widget::on_afterButton_clicked() { }

这段代码有一些问题。首先，头文件`#include <iostream>`和`#include <string>`似乎没有被使用到，可以删掉。其次，在`on_beforeButton_clicked()`和`on_afterButton_clicked()`两个函数中，没有编写具体的实现代码。最后，`qDebug()`函数在输出调试信息时不需要加上`<< endl`，因为`qDebug()`函数会自动在每一条输出信息后加上一个换行符，所以这里需要将`endl`删除。

下面是改错后的代码：

#include "widget.h"
#include "ui_widget.h"
#include <QTime>
#include <QTimer>
#include <QPixmap>
#include <QDebug>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->count = 0;
    this->tm = new QTimer(this);
    this->tm->start(1000);
    this->ui->label_2->setText(QTime::currentTime().toString("yyyy-MM-dd hh:mm:ss"));
    QTime time(0,0,0,0);
    this->ui->timeNumber->display(time.toString("hh:mm:ss"));
    //初始化label
    QPixmap pic(":/images/1.jpg");
    this->ui->label->setPixmap(pic);

    for (int i = 1; i <= 9; i ++) {
        QString file_path = ":/images/";
        file_path = QString::number(i) + ".jpg";
        ph_set.push_back(file_path);
        qDebug() << file_path;
    }

    connect(this->tm, &QTimer::timeout, this, &Widget::update_tm);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::update_tm()
{
    this->count ++;
    QTime time(0,0,0,0);
    this->ui->timeNumber->display(time.addSecs(count).toString("mm:ss"));
    this->ui->label_2->setText(QTime::currentTime().toString("hh:mm:ss"));
}

void Widget::on_beforeButton_clicked()
{
    // 在这里编写具体实现代码
}

void Widget::on_afterButton_clicked()
{
    // 在这里编写具体实现代码
}