8.16作业Qt

对登录页面进行进一步优化，发挥信号和槽的作用

1.  .ui文件

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>Widget</class>
 <widget class="QWidget" name="Widget">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>600</height>
   </rect>
  </property>
  <property name="acceptDrops">
   <bool>false</bool>
  </property>
  <property name="windowTitle">
   <string>QQ</string>
  </property>
  <property name="windowIcon">
   <iconset>
    <normaloff>R-C.jpg</normaloff>R-C.jpg</iconset>
  </property>
  <property name="styleSheet">
   <string notr="true">background-color: rgb(255, 255, 255);</string>
  </property>
  <widget class="QLabel" name="label">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>800</width>
     <height>250</height>
    </rect>
   </property>
   <property name="styleSheet">
    <string notr="true">background-color: rgb(19, 255, 78);</string>
   </property>
   <property name="text">
    <string/>
   </property>
   <property name="scaledContents">
    <bool>false</bool>
   </property>
   <property name="openExternalLinks">
    <bool>false</bool>
   </property>
  </widget>
  <widget class="QLabel" name="label_2">
   <property name="geometry">
    <rect>
     <x>220</x>
     <y>320</y>
     <width>40</width>
     <height>40</height>
    </rect>
   </property>
   <property name="text">
    <string/>
   </property>
   <property name="pixmap">
    <pixmap>R-C.jpg</pixmap>
   </property>
   <property name="scaledContents">
    <bool>true</bool>
   </property>
  </widget>
  <widget class="QLabel" name="label_3">
   <property name="enabled">
    <bool>true</bool>
   </property>
   <property name="geometry">
    <rect>
     <x>220</x>
     <y>380</y>
     <width>40</width>
     <height>40</height>
    </rect>
   </property>
   <property name="text">
    <string>密码</string>
   </property>
   <property name="scaledContents">
    <bool>false</bool>
   </property>
   <property name="wordWrap">
    <bool>false</bool>
   </property>
  </widget>
  <widget class="QLineEdit" name="lineEdit">
   <property name="geometry">
    <rect>
     <x>290</x>
     <y>320</y>
     <width>250</width>
     <height>40</height>
    </rect>
   </property>
   <property name="text">
    <string notr="true"/>
   </property>
  </widget>
  <widget class="QLineEdit" name="lineEdit_2">
   <property name="geometry">
    <rect>
     <x>290</x>
     <y>380</y>
     <width>250</width>
     <height>40</height>
    </rect>
   </property>
   <property name="autoFillBackground">
    <bool>false</bool>
   </property>
   <property name="inputMask">
    <string/>
   </property>
   <property name="text">
    <string notr="true"/>
   </property>
   <property name="frame">
    <bool>true</bool>
   </property>
   <property name="echoMode">
    <enum>QLineEdit::Normal</enum>
   </property>
   <property name="dragEnabled">
    <bool>false</bool>
   </property>
   <property name="readOnly">
    <bool>false</bool>
   </property>
   <property name="placeholderText">
    <string/>
   </property>
   <property name="clearButtonEnabled">
    <bool>false</bool>
   </property>
  </widget>
  <widget class="QLabel" name="label_4">
   <property name="geometry">
    <rect>
     <x>330</x>
     <y>550</y>
     <width>120</width>
     <height>16</height>
    </rect>
   </property>
   <property name="text">
    <string/>
   </property>
  </widget>
  <widget class="QLabel" name="label_5">
   <property name="enabled">
    <bool>false</bool>
   </property>
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>250</y>
     <width>800</width>
     <height>350</height>
    </rect>
   </property>
   <property name="text">
    <string/>
   </property>
   <property name="scaledContents">
    <bool>true</bool>
   </property>
  </widget>
  <zorder>label_5</zorder>
  <zorder>label</zorder>
  <zorder>label_2</zorder>
  <zorder>label_3</zorder>
  <zorder>lineEdit</zorder>
  <zorder>lineEdit_2</zorder>
  <zorder>label_4</zorder>
 </widget>
 <resources/>
 <connections/>
</ui>

2.头函数

#ifndef WIDGET_H
#define WIDGET_H
 
#include <QWidget>
#include <QPushButton>
#include <QLabel>
#include <QLineEdit>
#include <QMovie>
#include <cstring>
#include <QString>
#include <QDebug>
#include <ctime>
#include <thread>
#include <chrono>
#include <QThread>
 
 
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
void abc();
class Widget : public QWidget
{
    Q_OBJECT
    friend void abc();
public:
 
    Widget(QWidget *parent = nullptr);
    ~Widget();
signals:
    void  on_sig();
    void  on_si();
 
public slots:
    void my_slot();
    void my_slot2();
    void my_slot3();
 
private:
    Ui::Widget *ui;
    QPushButton *p1;
 
};
class WorkerThread : public QThread
{
    Q_OBJECT
public:
    void run() override {
        std::this_thread::sleep_for(std::chrono::seconds(10));
 
        emit resultReady();
    }
 
signals:
    void resultReady();
};
#endif // WIDGET_H

3.功能函数

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
    ,p1(new QPushButton("登录",this))
{
 
    connect(p1,SIGNAL(clicked()),this,SLOT(my_slot()));
 
    ui->setupUi(this);
    this->setWindowIcon(QIcon(":/R-C.jpg"));
 
    QMovie *mv2 = new QMovie(":/OIP2.gif");
    ui->label_5->setMovie(mv2);
    mv2->start();
    ui->label_5->setScaledContents(true);
 
    QMovie *mv1 = new QMovie(":/R-C.gif");
    ui->label->setMovie(mv1);
    mv1->start();
    ui->label->setScaledContents(true);
 
    ui->label_2->setPixmap(QPixmap(":/R-C.jpg"));
    ui->label_2->setScaledContents(true);
 
    ui->label_3->setPixmap(QPixmap(":/OIP-C.jpg"));
    ui->label_3->setScaledContents(true);
 
    ui->lineEdit->setPlaceholderText("请输入QQ号\\手机号");
 
    ui->lineEdit_2->setPlaceholderText("密码");
    ui->lineEdit_2->setEchoMode(QLineEdit::Password);
 
    p1->raise();
    p1->resize(300,40);
    p1->move(250,430);
    p1->setStyleSheet("background-color:rgb(31,200,253);color:white;\
                       border-radius:5px");
 
}
 
Widget::~Widget()
{
    delete ui;
}
void Widget::my_slot()
{
 
    char s1[10]="123456";
    char s2[10]="123456";
    if(ui->lineEdit->text()==s1&&ui->lineEdit_2->text()==s2)
    {
       qDebug() << "登陆成功";
       p1->setText("登录成功");
       WorkerThread *worker = new WorkerThread();//分离式线程时间延迟
       worker->start();
       connect(worker, &WorkerThread::resultReady,this,&Widget::my_slot2);
    }
    else
    {
        p1->setText("登陆失败、请重新登录");
        p1->setStyleSheet("background-color:rgb(51,200,253)");
        ui->lineEdit->clear();
        ui->lineEdit_2->clear();
        WorkerThread *worker = new WorkerThread();
        worker->start();
        connect(worker, &WorkerThread::resultReady,this,&Widget::my_slot3);
    }
}
void Widget::my_slot2()
{
   qDebug() << "关闭";
   close();
}
void Widget::my_slot3()
{
    p1->setText("登录");
    p1->setStyleSheet("background-color:rgb(31,200,253);color:white;\
                       border-radius:5px");
}

登录失败效果

 登录成功效果