void setupUi(QDialog *QWDialog) { if (QWDialog->objectName().isEmpty()) QWDialog->setObjectName(QString::fromUtf8("QWDialog")); QWDialog->resize(322, 223); QFont font; font.setFamily(QString::fromUtf8("\345\256\213\344\275\223")); font.setPointSize(11); QWDialog->setFont(font); verticalLayout = new QVBoxLayout(QWDialog); verticalLayout->setSpacing(6); verticalLayout->setContentsMargins(11, 11, 11, 11); verticalLayout->setObjectName(QString::fromUtf8("verticalLayout")); groupBox_2 = new QGroupBox(QWDialog); groupBox_2->setObjectName(QString::fromUtf8("groupBox_2")); horizontalLayout_2 = new QHBoxLayout(groupBox_2); horizontalLayout_2->setSpacing(6); horizontalLayout_2->setContentsMargins(11, 11, 11, 11); horizontalLayout_2->setObjectName(QString::fromUtf8("horizontalLayout_2")); chkBoxUnder = new QCheckBox(groupBox_2); chkBoxUnder->setObjectName(QString::fromUtf8("chkBoxUnder")); horizontalLayout_2->addWidget(chkBoxUnder); chkBoxItalic = new QCheckBox(groupBox_2); chkBoxItalic->setObjectName(QString::fromUtf8("chkBoxItalic")); horizontalLayout_2->addWidget(chkBoxItalic); chkBoxBold = new QCheckBox(groupBox_2); chkBoxBold->setObjectName(QString::fromUtf8("chkBoxBold")); horizontalLayout_2->addWidget(chkBoxBold);对以上函数的每一行都进行详细的注释

learn-qt-multiUI.zip

ui->setupUi(this); //connect(&wid,SIGNAL(ChangeUiSlot()),this,SLOT(dealslot())); connect(&wid,&widget::ChangeUiSlot,this,&MainWindow::dealslot); } MainWindow::~MainWindow() { delete ui; } void...

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专栏：Python基础教程目录专栏：使用PyQt开发图形界面Python应用专栏：PyQt入门学习老猿Python博文目录如果使用自定义信号，一定要记得信号是类变量，必须在类中定义，不能在实例方法中... self.setupUi(self) sel

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>- [ViewController setupUI] 28.82ms > + [UIButton buttonWithType:] 28.35ms > - [UIButton setTitle:forState:] 0.08ms > - [UIButton layer] 0.00ms > + [UIColor redColor] 0.01ms > - ...

verticalLayout->addWidget(groupBox_2); groupBox = new QGroupBox(QWDialog); groupBox->setObjectName(QString::fromUtf8("groupBox")); horizontalLayout_3 = new QHBoxLayout(groupBox); horizontalLayout_3->setSpacing(6); horizontalLayout_3->setContentsMargins(11, 11, 11, 11); horizontalLayout_3->setObjectName(QString::fromUtf8("horizontalLayout_3")); rBtnBlack = new QRadioButton(groupBox); rBtnBlack->setObjectName(QString::fromUtf8("rBtnBlack")); rBtnBlack->setChecked(true); horizontalLayout_3->addWidget(rBtnBlack); rBtnRed = new QRadioButton(groupBox); rBtnRed->setObjectName(QString::fromUtf8("rBtnRed")); horizontalLayout_3->addWidget(rBtnRed); rBtnBlue = new QRadioButton(groupBox); rBtnBlue->setObjectName(QString::fromUtf8("rBtnBlue")); horizontalLayout_3->addWidget(rBtnBlue); verticalLayout->addWidget(groupBox); txtEdit = new QPlainTextEdit(QWDialog); txtEdit->setObjectName(QString::fromUtf8("txtEdit")); QFont font1; font1.setPointSize(20); txtEdit->setFont(font1); verticalLayout->addWidget(txtEdit); verticalSpacer = new QSpacerItem(20, 40, QSizePolicy::Minimum, QSizePolicy::Expanding); verticalLayout->addItem(verticalSpacer); horizontalLayout = new QHBoxLayout(); horizontalLayout->setSpacing(6); horizontalLayout->setObjectName(QString::fromUtf8("horizontalLayout")); horizontalSpacer_2 = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum); horizontalLayout->addItem(horizontalSpacer_2); btnOK = new QPushButton(QWDialog); btnOK->setObjectName(QString::fromUtf8("btnOK")); horizontalLayout->addWidget(btnOK); btnCancel = new QPushButton(QWDialog); btnCancel->setObjectName(QString::fromUtf8("btnCancel")); horizontalLayout->addWidget(btnCancel); horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum); horizontalLayout->addItem(horizontalSpacer); btnClose = new QPushButton(QWDialog); btnClose->setObjectName(QString::fromUtf8("btnClose")); horizontalLayout->addWidget(btnClose); verticalLayout->addLayout(horizontalLayout); retranslateUi(QWDialog); QObject::connect(btnOK, SIGNAL(clicked()), QWDialog, SLOT(accept())); QObject::connect(btnCancel, SIGNAL(clicked()), QWDialog, SLOT(reject())); QObject::connect(btnClose, SIGNAL(clicked()), QWDialog, SLOT(close())); QMetaObject::connectSlotsByName(QWDialog); } // setupUi对以上的每一行代码都进行详细的注释，并用代码框发给我

groupBox->setObjectName(QString::fromUtf8("groupBox")); 创建一个名为 groupBox 的 QGroupBox，并将其加入对话框界面。 cpp horizontalLayout_3 = new QHBoxLayout(groupBox); 创建一个 QHBoxLayout ...

#include "widget.h" #include "ui_widget.h" #include <QTime> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); //显示系统时间 //实例化对象 this->timer=new QTimer(this); QString curtime=QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); //信号和槽函数关联 connect(this->timer,&QTimer::timeout,this,&Widget::update_time); //启动定时器 this->timer->start(1000); //计时 this->timer->start(1000); this->count=0; QTime time(0,0,0,0); //QTime转换成QString QString sec=time.addSecs(this->count).toString("mm:ss"); //更新到LCDNumber显示 this->ui->lcdNumber->display(sec); //实例化 this->timer=new QTimer(this); //信号和参函数关联 connect(this->timer,&QTimer::timeout,this,&Widget::update_time); } Widget::~Widget() { delete ui; } void Widget::on_home_btn_clicked() { //首页 } void Widget::on_per_btn_clicked() { //上一页 } void Widget::on_next_btn_clicked() { //下一页 } void Widget::on_last_btn_clicked() { //尾页 } void Widget::update_time() { //获取系统时间 QString curtime=QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); //显示 this->ui->time_lab->setText(curtime); } void Widget::update_time2() { //计时 this->count++; QTime time(0,0,0,0); //QTime转换成QString QString sec=time.addSecs(this->count).toString("mm:ss"); //更新到LCDNumber显示 this->ui->lcdNumber->display(sec); }修改代码让程序运行后直接启动倒计时

ui->setupUi(this); //显示系统时间 QString curtime=QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); this->ui->time_lab->setText(curtime); //启动定时器 this->timer=new QTimer(this);...

#include "widget.h" #include "ui_widget.h" #include <QTime> #include <QStringList> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); //显示系统时间 //实例化对象 this->timer=new QTimer(this); QString curtime=QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); //信号和槽函数关联 connect(this->timer,&QTimer::timeout,this,&Widget::update_time); //启动定时器 this->timer->start(1000); //启动计时器 this->count=0; //实例化对象 this->timer2=new QTimer(this); //信号和槽函数关联 connect(this->timer2,&QTimer::timeout,this,&Widget::update_time2); //开始计时 this->timer2->start(1000); /初始化图片列表 QStringList images; } Widget::~Widget() { delete ui; } void Widget::on_home_btn_clicked() { //首页 } void Widget::on_per_btn_clicked() { //上一页 } void Widget::on_next_btn_clicked() { //下一页 } void Widget::on_last_btn_clicked() { //尾页 } void Widget::update_time() { //获取系统时间 QString curtime=QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss"); //显示 this->ui->time_lab->setText(curtime); } void Widget::update_time2() { //计时 this->count++; QTime time(0,0,0,0); //QTime转换成QString QString sec=time.addSecs(this->count).toString("mm:ss"); //更新到LCDNumber显示 this->ui->lcdNumber->display(sec); }使用QStringList实现电子相册，并添加背景

if (this->images.isEmpty()) { return; } QPixmap pixmap(":/images/" + this->images.first()); this->ui->image_label->setPixmap(pixmap); } 在上一页、下一页、尾页按钮的槽函数中分别显示前一张、...

有没有错误loginDialog::loginDialog(QWidget parent) : QDialog(parent), ui(new Ui::loginDialog) { loginDialog::ui->setupUi(this); loginDialog::ui->lineEditPassword->setEchoMode(QLineEdit::Password); setWindowTitle("Login"); } void loginDialog::on_buttonLogin_clicked() { student newStudent = new student; static int count=0; QString filePath = QCoreApplication::applicationDirPath() + "/student.txt"; QFile file(filePath); if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug() << "Could not open file" << filePath; return; } QTextStream in(&file); while (!in.atEnd()) { QString line = in.readLine(); if(line == "end"){ break; } QStringList data = line.split(" "); newStudent->m_name = data[0]; newStudent->m_ID = data[1]; if(loginDialog::ui->lineEditID->text()==newStudent->m_name){ break; } } if (loginDialog::ui->lineEditPassword->text()==newStudent->m_ID) { accept(); } else { count++; qDebug()<<count; if(count>2) { this->close(); // 3次错误退出 } else { /* QMessageBox::warning(NULL,"warning",newStudent->m_name+newStudent->m_ID);*/ QMessageBox::warning(NULL, "warning","Account password error,please login again.you have "+QString::number(3-count)+" chances"); } } delete newStudent; file.close(); }

if(newStudent->m_name.isEmpty()){ // 没有找到匹配的用户名 delete newStudent; QMessageBox::warning(NULL, "warning", "No user found"); return; } if (loginDialog::ui->lineEditPassword->text()==...

QT改错，#include "widget.h" #include "ui_widget.h" #include <QTime> #include <QTimer> #include <QPixmap> #include <iostream> #include <string> #include <QDebug> Widget::Widget(QWidget *parent) : QWidget(parent) , ui(new Ui::Widget) { ui->setupUi(this); this->count = 0; this->tm = new QTimer(this); this->tm->start(1000); this->ui->label_2->setText(QTime::currentTime().toString("yyyy-MM-dd hh:mm:ss")); QTime time(0,0,0,0); this->ui->timeNumber->display(time.toString("hh:mm:ss")); //初始化label QPixmap pic(":/images/1.ipg"); this->ui->label->setPixmap(pic); for (int i = 1; i <= 9; i ++){ QString file_path = ":/images/"; file_path = QString::number(i) + ".jpg"; ph_set.push_back(file_path); qDebug() << file_path << endl; } connect(this->tm,&QTimer::timeout,this,&Widget::update_tm); } Widget::~Widget() { delete ui; } void Widget::update_tm() { this->count ++; QTime time(0,0,0,0); this->ui->timeNumber->display(time.addSecs(count).toString("mm:ss")); this->ui->label_2->setText(QTime::currentTime().toString("hh:mm:ss")); } void Widget::on_beforeButton_clicked() { } void Widget::on_afterButton_clicked() { }

ui->setupUi(this); this->count = 0; this->tm = new QTimer(this); this->tm->start(1000); this->ui->label_2->setText(QTime::currentTime().toString("yyyy-MM-dd hh:mm:ss")); QTime time(0,0,0,0); ...

逐步解释下面代码，以及为什么这样写：#include "chatdialog.h" #include "ui_chatdialog.h" #include<QTime> #include<QDebug> ChatDialog::ChatDialog(QWidget *parent) : QDialog(parent), ui(new Ui::ChatDialog) { ui->setupUi(this); } ChatDialog::~ChatDialog() { delete ui; } //设置聊天窗口信息 void ChatDialog::setChatDialogInfo(QString ip) { //保存成员变量 m_ip = ip; //设置窗口title setWindowTitle(QString("与【%1】的聊天窗口").arg(m_ip)); } //设置聊天内容显示到浏览窗口 void ChatDialog::setChatMsg(QString content) { ui->tb_chat->append(QString("【%1】 %2").arg(m_ip).arg(QTime::currentTime().toString("hh:mm:ss"))); ui->tb_chat->append(content); } void ChatDialog::on_pb_send_clicked() { //1.获取到用户输入的纯文本数据并校验，不能是空字符串或者全为空格 QString content = ui->te_chat->toPlainText(); if (content.isEmpty() || content.remove(" ").isEmpty()){ return; } //2.获取带格式的文本，删除框里的内容 content = ui->te_chat->toHtml(); qDebug()<< "content:" <<content; ui->te_chat->clear(); //3.把内容显示到浏览窗口,格式【我】时间内容 ui->tb_chat->append(QString("【我】 %1").arg(QTime::currentTime().toString("hh:mm:ss"))); ui->tb_chat->append(content); //4.把ip和内容发给kernel，因为窗口知道，但kernel不知道发给谁 Q_EMIT SIG_sendMsg(content,m_ip); }

if (content.isEmpty() || content.remove(" ").isEmpty()){ return; } content = ui->te_chat->toHtml(); qDebug()<< "content:" ; ui->te_chat->clear(); ui->tb_chat->append(QString("【我】 %1").arg...

用代码实现：在MainWindow类的构造函数中，使用以下代码来获取指向这两个按钮的指针： QPushButton startButton = ui->pushButton; QPushButton pauseButton = ui->pushButton_2;

ui->setupUi(this); // 获取指向两个按钮的指针 QPushButton *startButton = ui->pushButton; QPushButton *pauseButton = ui->pushButton_2; // 对按钮进行操作，比如设置按钮的文本、绑定按钮的点击事件...

ui->setupUi(this); this->setWindowTitle("Modem检测工具V1.0.9"); this->portManager = PortManager::instance(); ui->textEdit->setFocus(); //textEdit focus ui->textEdit->setPlaceholderText("请扫码输入："); ui->textBrowserResult->setPlaceholderText("Total Results");

第一行代码 ui->setupUi(this) 是用于设置用户界面的，this 指向当前的 MainWindow 对象，表示将创建的用户界面添加到当前的 MainWindow 对象中。第二行代码是设置 MainWindow 对象的窗口标题，这里设置为 "Modem...

#include "xuwidget.h" #include "ui_xuwidget.h" #include "stdio.h" #include "stdlib.h" xuWidget::xuWidget(QWidget *parent) : QWidget(parent), ui(new Ui::xuWidget),openflage(false) { ui->setupUi(this); this->setWindowTitle("XCOM V1.4"); SerialPort = new QSerialPort(this); } xuWidget::~xuWidget() { delete ui; } //清除接收 void xuWidget::on_ClearRecvPushButton_clicked() { ui->RecvDataPlainTextEdit->clear(); } //清除发送 void xuWidget::on_CleanSendPushButton_clicked() { ui->SendDataPlainTextEdit->clear(); } //打开或关闭串口 void xuWidget::on_OpenAndCloseComBox_clicked() { if(!openflage) { ReadCurrentSettingInfo(); if(SerialPort->open(QIODevice::ReadWrite)) { openflage = true; ui->OpenAndClosePushButton->setText("关闭串口"); } } else { SerialPort->close(); ui->OpenAndClosePushButton->setText("打开串口"); openflage = false; } } //读取当前串口助手配置信息 void xuWidget::ReadCurrentSettingInfo() { //设置端口名称 SerialPort->setPortName(ui->comboBox->currentText()); //读取波特率 SerialPort->setBaudRate(ui->BaudComBox->currentText().toInt()); //设置停止位 switch(ui->StopBitComBox->currentText()) { case 0:SerialPort->setStopBits(QSerialPort::OneStop);break; case 1:SerialPort->setStopBits(QSerialPort::OneAndHalfStop);break; case 2:SerialPort->setStopBits(QSerialPort::TwoStop);break; } //设置数据位 switch(ui->DataBitComBox->currentText()) { case 0:SerialPort->setDataBits(QSerialPort::Data8);break; case 1:SerialPort->setDataBits(QSerialPort::Data7);break; case 2:SerialPort->setDataBits(QSerialPort::Data6);break; case 3:SerialPort->setDataBits(QSerialPort::Data5);break; } //设置奇偶校验 switch(ui->EvenAndOddCheckBitComBox->currentText()) { case 0:SerialPort->setParity(QSerialPort::NoParity);break; case 1:SerialPort->setParity(QSerialPort::OddParity);break; case 2:SerialPort->setParity(QSerialPort::EvenParity);break; } } 这段代码哪里有错误

3. 在使用 QObject 的子类时，记得在类定义中加入 Q_OBJECT 宏，以启用信号和槽机制。 4. 检查 xuWidget 类的父类是否正确继承自 QWidget。 5. 如果出现编译错误，请检查编译器报告的错误信息，并根据需要...

ui->setupUi(this); ui->port->setText("8899"); ui->ip->setText("127.0.0.1"); setWindowTitle("客户端"); ui->disconnect->setDisabled(true);是什么意思

- ui->setupUi(this); 是用于将UI文件中的控件和代码中的对象关联起来，使得可以在代码中访问UI控件。 - ui->port->setText("8899"); 是设置客户端程序连接的端口号为8899。 - ui->ip->setText("127.0.0.1"); ...

#include "dialog.h" #include "ui_dialog.h" #include "student.h" #include "studentwork.h" #include <studentmanager.h> #include <QFile> #include <QTextCodec> #include <QTimer> #include <QCoreApplication> Dialog::Dialog(QWidget parent) : QDialog(parent), ui(new Ui::Dialog) { ui->setupUi(this); ui->lineEditPassword->setEchoMode(QLineEdit::Password); setWindowTitle("Login"); } Dialog::~Dialog() { delete ui; } void Dialog::on_buttonLogin_clicked() { student newStudent = new student; static int count=0; QString ID=ui->lineEditPassword->text(); auto it = studentManager::m_students.find(ID); QString filePath = QCoreApplication::applicationDirPath() + "/student.txt"; QFile file(filePath); if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { qDebug() << "Could not open file" << filePath; return; } QTextStream in(&file); while (!in.atEnd()&&ui->lineEditID->text()!=newStudent->m_name) { QString line = in.readLine(); if(line == "end"){ break; } QStringList data = line.split(" "); newStudent->m_name = data[0]; newStudent->m_ID = data[1]; if(ui->lineEditID->text()==newStudent->m_name){ break; } } if (ui->lineEditPassword->text()==newStudent->m_ID) { accept(); } else { count++; qDebug()<<count; if(count>2) { this->close(); // 3次错误退出 } else { /* QMessageBox::warning(NULL,"warning",newStudent->m_name+newStudent->m_ID);*/ QMessageBox::warning(NULL, "warning","Account password error,please login again.you have "+QString::number(3-count)+" chances"); } } file.close(); }

这是一个登录界面的代码，通过输入用户名和密码来进行登录，其中使用了student类和studentManager类来进行数据管理。文件读取使用了QFile和QTextStream类。在点击登录按钮时，会读取文件中的内容，并将用户名和密码...

LoginDialog::LoginDialog(QWidget *parent) : QDialog(parent), ui(new Ui::LoginDialog) { ui->setupUi(this); ui->pwdLineEdit->setFocus(); } LoginDialog::~LoginDialog() { delete ui; } void LoginDialog::on_loginPushButton_clicked() { showWeiChatWindow(); } void LoginDialog::showWeiChatWindow() { QFile file("userlog.xml"); mydoc.setContent(&file); QDomElement root = mydoc.documentElement(); if (root.hasChildNodes()) { QDomNodeList userList = root.childNodes(); bool exist = false; for (int i = 0; i < userList.count(); i++) { QDomNode user = userList.at(i); QDomNodeList record = user.childNodes(); QString uname = record.at(0).toElement().text(); QString pword = record.at(1).toElement().text(); if (uname == ui->usrLineEdit->text()) { exist = true; if (!(pword == ui->pwdLineEdit->text())) { QMessageBox::warning(0, QObject::tr("提示"), "口令错！请重新输入。"); ui->pwdLineEdit->clear(); ui->pwdLineEdit->setFocus(); return; } } } if (!exist) { QMessageBox::warning(0, QObject::tr("提示"), "此用户不存在！请重新输入。"); ui->usrLineEdit->clear(); ui->pwdLineEdit->clear(); ui->usrLineEdit->setFocus(); return; } weiChatWindow = new MainWindow(0); weiChatWindow->setWindowTitle(ui->usrLineEdit->text()); weiChatWindow->show(); } }

构造函数 LoginDialog::LoginDialog(QWidget *parent) 接收一个 QWidget 类型的参数 parent，调用了 QDialog 类的构造函数并通过 ui->setupUi(this) 初始化了 LoginDialog 对象的界面。同时，它还将密码输入框 ui->...

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用代码实现：在MainWindow类的构造函数中，使用以下代码来获取指向这两个按钮的指针： QPushButton startButton = ui->pushButton; QPushButton pauseButton = ui->pushButton_2;