1.

#include "widget.h"Widget::Widget(QWidget *parent): QWidget(parent)
{this->resize(540,415);this->setFixedSize(540,415);//窗口标题this->setWindowTitle("盗版QQ");//窗口图标this->setWindowIcon(QIcon("E:\\qq\\pictrue\\pictrue\\qq.png"));//背景颜色this->setStyleSheet("background-color:white");//============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("E:\\qq\\pictrue\\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("E:\\qq\\pictrue\\pictrue\\wodepeizhenshi.png"));lab2->setScaledContents(true);QLabel *lab3 = new QLabel(this);lab3->resize(30,30);lab3->move(120, 260);lab3->setPixmap(QPixmap("E:\\qq\\pictrue\\pictrue\\passwd.jpg"));lab3->setScaledContents(true);//============行编辑器相关设置=======edit3 = new QLineEdit(this);edit3->resize(275,30);edit3->move(155,210);edit3->setPlaceholderText("QQ号/手机号/邮箱");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);connect(btn,&QPushButton::clicked,this,&Widget::btn1_clicked);}void Widget::btn1_clicked()
{if(this->edit3->text() == "Admin" && this->edit2->text() == "123456"){QMessageBox box(QMessageBox::Question,"信息对话框","登录成功",QMessageBox::Ok,this);int res1 = box.exec();if(res1 == QMessageBox::Ok){emit jump();this->close();
}
}else{
QMessageBox box(QMessageBox::Critical,"错误对话框","登录失败，是否重新登录",QMessageBox::Ok|QMessageBox::No,this);// box.setButtonText(QMessageBox::Ok,"yes");// box.setButtonText(QMessageBox::No,"no");int res = box.exec();if(res == QMessageBox::Ok){this->edit2->clear();this->edit3->clear();}else if(res == QMessageBox::No){this->close();}}
}
Widget::~Widget()
{
}

2.

#include "widget.h"
#include "ui_widget.h"Widget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);
}Widget::~Widget()
{delete ui;
}void Widget::on_pushButton_clicked()
{bool ok = false;QFont f = QFontDialog::getFont(&ok,QFont("宋体",10,10,true),this,"选择字体");if(ok){ui->textEdit->setCurrentFont(f);}
}void Widget::on_pushButton_2_clicked()
{QColor c = QColorDialog::getColor(QColor("red"),this,"选择颜色");if(c.isValid() == true){ui->textEdit->setTextColor(c);}
}void Widget::on_pushButton_3_clicked()
{QString fileName = QFileDialog::getOpenFileName(this,"选择文件","./","all(*.*);;images(*.png *.jpg *.gif);;源文件(*.cpp)");qDebug() << fileName;QFile file(fileName);if(file.open(QFile::ReadOnly) == false){QMessageBox::information(this,"提示","文件打开失败");return;}QByteArray msg = file.readAll();ui->textEdit->setText(msg);file.close();
}void Widget::on_pushButton_4_clicked()
{QString fileName = QFileDialog::getSaveFileName(this,"选择文件","./","all(*.*);;images(*.png *.jpg *.gif);;源文件(*.cpp)");QFile file(fileName);//打开文件if(!file.open(QFile::WriteOnly)){return;}//获取textEdit中的内容QString msg = ui->textEdit->toPlainText();//将textEdit中的内容写入到filename中file.write(msg.toLocal8Bit());//关闭文件file.close();}