1.概要

2.代码

#include "dialog.h"
#include "ui_dialog.h"
#include <QPushButton>

Dialog::Dialog(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::Dialog)
{
    ui->setupUi(this);
    QPushButton *button = new QPushButton("My Button", this);
    button->setGeometry(QRect(10, 10, 80, 30)); // 设置位置和大小
    button->setStyleSheet("QPushButton { background-color: red; }"); // 设置样式表
}

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

3.运行结果