0207作业

思维导图

作业

源代码

#include "widget.h"
#include "ui_widget.h"
#include<QDebug>
#include<QPushButton>
#include<QLineEdit>
#include<QLabel>



Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    //设置界面的尺寸
    this->resize(400,500);
    this->setWindowFlag(Qt::FramelessWindowHint);//去除窗口头部
    this->setStyleSheet("background-color:pink");

    //this->setStyleSheet("background-color:");

    //有参构造两个按钮（登陆和取消）
    QPushButton *btn1 = new QPushButton("登陆",this);
    btn1->resize(125,40);
    btn1->move(70,350);
    btn1->setFont(QFont("华文行楷",18,0));
    btn1->setStyleSheet("background-color:skyblue;");
    btn1->setIcon(QIcon("C:\\Users\\黑色世界\\Desktop\\icon"));


    QPushButton *btn2 = new QPushButton("取消",this);
    btn2->resize(btn1->size());
    btn2->move(btn1->x()+btn1->width()+20,btn1->y());
    btn2->setFont(QFont("华文行楷",18,0));
    btn2->setStyleSheet("background-color:skyblue;");
    btn2->setIcon(QIcon("C:\\Users\\黑色世界\\Desktop\\icon"));

    //设置账号和密码的行编辑器
    QLineEdit *edit1 = new QLineEdit;
    edit1->setParent(this);
    edit1->resize(180,40);
    edit1->move(140,180);
    edit1->setStyleSheet("background-color:white");
    edit1->setAlignment(Qt::AlignCenter);
    edit1->setPlaceholderText("请输入账号");

    this->edit2 = new QLineEdit(this);
    edit2->resize(edit1->size());
    edit2->move(edit1->x(),edit1->y()+edit1->height()+20);
    edit2->setStyleSheet("background-color:white");
    edit2->setAlignment(Qt::AlignCenter);
    edit2->setPlaceholderText("请输入密码");

    //设置账号和密码两个标签
    QLabel *lab1 = new QLabel("账号:",this);
    lab1->resize(45,40);
    lab1->move(90,180);
    lab1->setFont(QFont("华文行楷",15,0));

    QLabel *lab2 = new QLabel("密码:",this);
    lab2->resize(lab1->size());
    lab2->move(lab1->x(),lab1->y()+lab1->height()+20);
    lab2->setFont(QFont("华文行楷",15,0));

    //链接登陆按钮与槽函数
    QObject::connect(
                btn1,
                &QPushButton::clicked,
                this,
                &Widget::btn1_slot
                );
    //链接取消按钮与槽函数
    QObject::connect(
                btn2,
                &QPushButton::clicked,
                this,
                &Widget::btn2_slot
                );

}

//登陆按钮对应的槽函数
void Widget::btn1_slot()
{
    if(0)
    {
       qDebug() << "登陆成功";
       this->close();

    }
    else
    {
        qDebug() << "登陆失败";
        edit2->clear();
    }
}

//取消按钮对应的槽函数
void Widget::btn2_slot()
{
    this->close();
    emit my_signal();
}


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

头文件

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QLineEdit>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT
signals:
    void my_signal();

public slots:
    void btn1_slot();
    void btn2_slot();


public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private:
    Ui::Widget *ui;
    QLineEdit *edit2;
};
#endif // WIDGET_H