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();
}