一思维导图

二.练习

widget.h

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->setWindowFlag(Qt::FramelessWindowHint);
    this->setAttribute(Qt::WA_TranslucentBackground);
}

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

void Widget::on_bt1_clicked()
{
      QString number=ui->lineEdit->text();
    QString  password=ui->lineEdit_2->text();
    if(number == "111111"&& password=="000000")
    {
        //QMessageBox::information(this,"提示","登陆成功");
         emit my_signal();
        this->close();
    }else {
                QMessageBox::information(this,"提示","手机号或密码输入错误");
                ui->lineEdit->clear();
                 ui->lineEdit_2->clear();

    }

}

main.cpp

#include "widget.h"
#include"form.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    Form f;//实例化第二个界面
    QObject::connect(&w,&Widget::my_signal,&f,&Form::jump_slots);





    return a.exec();
}