widget.cpp

#include "widget.h"Widget::Widget(QWidget *parent): QWidget(parent)
{QPushButton *btn1 =new QPushButton("登录",this);this->setFixedSize(640,480);btn1->resize(80,40);btn1->move(200,300);btn1->setIcon(QIcon("C:\\Users\\Administrator\\Desktop\\中国结\\picture"));btn1->setStyleSheet("color :white; background-color:skyblue;border-radius:10px");QPushButton *btn2 =new QPushButton("取消",this);btn2->resize(btn1->size());btn2->move(btn1->x()+btn1->width()+50,btn1->y());btn2->setIcon(QIcon("C:\\Users\\Administrator\\Desktop\\中国结\\picture"));btn2->setStyleSheet("color :white; background-color:skyblue;border-radius:10px");QLineEdit *edit1=new QLineEdit(this);edit1->resize(300,30);edit1->move(180,220);edit1->setStyleSheet("color :black;");edit1->setAlignment(Qt::AlignCenter);edit1->setEchoMode(QLineEdit::Password);edit1->setPlaceholderText("输入QQ密码");QLineEdit *edit2=new QLineEdit(this);edit2->resize(300,30);edit2->move(edit1->x(),edit1->y()-edit1->height()-10);edit2->setStyleSheet("color :black;");edit2->setAlignment(Qt::AlignCenter);edit2->setPlaceholderText("输入QQ账号");QLabel *lab1 = new QLabel;lab1->setParent(this);lab1->setText("密码：");lab1->move(edit1->x()-40, edit1->y()+10);QLabel *lab2 = new QLabel;lab2->setParent(this);lab2->setText("账号：");lab2->move(edit1->x()-40, edit1->y()-30);}Widget::~Widget()
{
}

main.cpp

#include "widget.h"#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}

 widget.h

#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>
#include<QPushButton>
#include<QLineEdit>
#include<QLabel>
class Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent = nullptr);~Widget();
};
#endif // WIDGET_H