Qt - 第 2 天 - 信号和插槽

#include "mywidget.h"

MyWidget::MyWidget(QWidget *parent)

    : QWidget(parent)

{

    //==============窗口相关设置=======

    this->resize(540,415);

    this->setFixedSize(540,415);

    //窗口标题

    this->setWindowTitle("盗版QQ");

    //窗口图标

    this->setWindowIcon(QIcon(":/pictrue/qq.png"));

    //背景颜色

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

    //去掉头部

    this->setWindowFlag(Qt::FramelessWindowHint);

    //============标签相关设置=======

    QLabel *lab1 = new QLabel(this);

    //设置大小

    lab1->resize(540, 160);

    lab1->setStyleSheet("background-color:pink");

    //动图类 接收动图

    QMovie *mv = new QMovie(":/pictrue/zz.gif");

    //将动图放入标签中

    lab1->setMovie(mv);

    //让动图动起来

    mv->start();

    //自动适应

    lab1->setScaledContents(true);

    QLabel *lab2 = new QLabel(this);

    lab2->resize(30,30);

    lab2->move(120,210);

    lab2->setPixmap(QPixmap(":/pictrue/wodepeizhenshi.png"));

    lab2->setScaledContents(true);

    QLabel *lab3 = new QLabel(this);

    lab3->resize(30,30);

    lab3->move(120, 260);

    lab3->setPixmap(QPixmap(":/pictrue/passwd.jpg"));

    lab3->setScaledContents(true);

    //============行编辑器相关设置=======

    QLineEdit *edit1 = new QLineEdit(this);

    edit1->resize(275,30);

    edit1->move(155,210);

    edit1->setPlaceholderText("QQ号/手机号/邮箱");

    QLineEdit *edit2 = new QLineEdit(this);

    edit2->resize(275,30);

    edit2->move(155,260);

    edit2->setPlaceholderText("密码");

    edit2->setEchoMode(QLineEdit::Password);

    //============按钮相关设置=======

    QPushButton *btn = new QPushButton("登录",this);

    btn->resize(300,45);

    btn->move(120,345);

    //样式函数setStyleSheet()

    btn->setStyleSheet("background-color:rgb(8,189,253);border-radius:5px;color:white");

   // connect(btn,&QPushButton::clicked,edit1,&QLineEdit::textChanged);

  //  connect(btn,&QPushButton::clicked,edit2,&QLineEdit::textChanged);

    connect(edit1,&QLineEdit::textChanged,this,&MyWidget::signal);

     connect(edit2,&QLineEdit::textChanged,this,&MyWidget::signal);

}

MyWidget::~MyWidget()

{

}

void MyWidget::signal()

{

    if(edit1->text().size()>=5 && edit2->text().size()>=5){

              btn->setStyleSheet("background-color:green");

            }

    if(edit1->text()=="paomao"&&edit2->text()=="555555")

    {

        qDebug() << "登录成功";

        this->close();

    }

    else

    {

        qDebug() << "登录失败，密码账号有错误，请重新输入";

        edit1->clear();

        edit2->clear();

    }

}