QTday2

第一个界面头部的代码

#ifndef WIDGET_H
#define WIDGET_H

#include 
#include 
#include
#include
#include
#include
class Widget : public QWidget
{
    Q_OBJECT

signals:
    void jump();
public slots://自定义登录按钮的信号处理函数
    void butn1_slot();



public:
    Widget(QWidget *parent = 0);
    ~Widget();
    QLabel *label1;
    QLabel *label2;
    QLabel *label3;
    QLineEdit *edit1;
    QLineEdit *edit2;
    QPushButton *butn1;
    QPushButton *butn2;
};

#endif // WIDGET_H

第一个界面的代码

#include "widget.h"

void Widget::butn1_slot()
{
    if(this->edit1->text() == "admin"&&this->edit2->text() == "123456")
   {
      qDebug()<<"登录成功";
      emit jump();
      this->close();//登陆成功后消失
    }
    else {
        qDebug() << "账号或密码有误请重新输入";
    }

}



Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    this->setWindowIcon(QIcon(":/icon/logo.png"));
    this->setWindowTitle("HQYJChat");
    this->resize(700,750);
    this->setStyleSheet("background-color:white");

    label1 = new QLabel(this);
    label1->setPixmap(QPixmap(":/icon/logo.png"));
    label1->resize(700,260);
    label1->setScaledContents(true);

    label2 = new QLabel(this);
    label2->setPixmap(QPixmap(":/icon/userName.jpg"));
    label2->resize(30,30);
    label2->move(170,320);
    label2->setScaledContents(true);

    label3 = new QLabel(this);
    label3->setPixmap(QPixmap(":/icon/passwd.jpg"));
    label3->resize(30,30);
    label3->move(170,390);
    label3->setScaledContents(true);

    edit1 = new QLineEdit(this);
    edit1->move(210,310);
    edit1->resize(300,50);
    edit1->setStyleSheet("border:none;border-bottom:2px solid lightblue");
    edit1->setPlaceholderText("QQ号/微信/邮箱");

    edit2 = new QLineEdit(this);
    edit2->move(210,380);
    edit2->resize(300,50);
    edit2->setStyleSheet("border:none;border-bottom:2px solid lightblue");
    edit2->setPlaceholderText("密码");
    edit2->setEchoMode(QLineEdit::Password);

    butn1 = new QPushButton(this);
    butn1->move(210,490);
    butn1->resize(100,50);
    butn1->setText("登录");
    butn1->setIcon(QIcon(":/icon/login.png"));
    connect(this->butn1,SIGNAL(clicked()),this,SLOT(butn1_slot()));//qt4版本的连接

    butn2 = new QPushButton(this);
    butn2->move(380,490);
    butn2->resize(100,50);
    butn2->setText("取消");
    butn2->setIcon(QIcon(":/icon/cancel.png"));
    connect(this->butn2,&QPushButton::clicked,this,&Widget::close);//qt5版本的连接

}

Widget::~Widget()
{

}

第二个界面cpp里的的代码

#include "second.h"
#include "ui_second.h"

void Second::jump()
{
    this->show();
}

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

}

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

第二个界面头部的代码

#ifndef SECOND_H
#define SECOND_H

#include 

namespace Ui {
class Second;
}

class Second : public QWidget
{
    Q_OBJECT
public:
    void jump();
public:
    explicit Second(QWidget *parent = nullptr);
    ~Second();

private:
    Ui::Second *ui;
};

#endif // SECOND_H