科技类网站模板,中国产品设计网,建立网站考虑的三大要素,网络营销方式的对比分析论文1#xff1a;在注册登录的练习里面#xff0c;
追加一个QListWidget 项目列表
要求#xff1a;点击注册之后#xff0c;将账号显示到 listWidget上面去
以及#xff0c;在listWidget中双击某个账号的时候#xff0c;将该账号删除
Widget.h
#ifndef WIDGET_H
#define…1在注册登录的练习里面
追加一个QListWidget 项目列表
要求点击注册之后将账号显示到 listWidget上面去
以及在listWidget中双击某个账号的时候将该账号删除
Widget.h
#ifndef WIDGET_H
#define WIDGET_H#include QByteArray
#include QWidget
#include QFile
#include QString
#include QListWidgetQT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent nullptr);~Widget();void seve_data(const QString filename,const QString data);QString load_data(const QString filename);void seve_pwd(const QString filename,const QString data);QString load_pwd(const QString filename);private slots:void on_lineEdit_textChanged(const QString arg1);void on_lineEdit_2_textChanged(const QString arg1);void on_pushButton_3_pressed();void on_pushButton_3_released();void on_pushButton_clicked();void on_listWidget_itemDoubleClicked(QListWidgetItem *item);private:Ui::Widget *ui;QFile file;
};
#endif // WIDGET_HWidget.cpp
#include widget.h
#include ui_widget.hWidget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui-setupUi(this);QString nameload_data(D:/1.txt);ui-lineEdit-setText(name);QString pwdload_pwd(D:/pwd.txt);ui-lineEdit_2-setText(pwd);
}Widget::~Widget()
{QString strui-lineEdit-text();seve_data(D:/1.txt,str);if(ui-checkBox-QCheckBox::checkState()Qt::Checked){QString pwdui-lineEdit_2-text();seve_pwd(D:/pwd.txt,pwd);}delete ui;
}void Widget::seve_data(const QString filename, const QString data)
{file.setFileName(filename);file.open(QFile::WriteOnly);file.write(data.toLocal8Bit());file.close();
}QString Widget::load_data(const QString filename)
{file.setFileName(filename);file.open(QFile::ReadOnly);QByteArray arrfile.readAll();QString str QString::fromLocal8Bit(arr);file.close();return str;
}void Widget::seve_pwd(const QString filename, const QString data)
{file.setFileName(filename);file.open(QFile::WriteOnly);file.write(data.toLocal8Bit());file.close();
}QString Widget::load_pwd(const QString filename)
{file.setFileName(filename);file.open(QFile::ReadOnly);QByteArray arrfile.readAll();QString strQString::fromLocal8Bit(arr);file.close();return str;
}void Widget::on_lineEdit_textChanged(const QString arg1)
{QString nameui-lineEdit-text();QString pwdui-lineEdit_2-text();if(name.isEmpty() || pwd.isEmpty()){ui-pushButton-setEnabled(0);ui-pushButton_2-setEnabled(0);}else{ui-pushButton-setEnabled(1);ui-pushButton_2-setEnabled(1);}
}void Widget::on_lineEdit_2_textChanged(const QString arg1)
{QString nameui-lineEdit-text();QString pwdui-lineEdit_2-text();if(name.isEmpty() || pwd.isEmpty()){ui-pushButton-setEnabled(0);ui-pushButton_2-setEnabled(0);}else{ui-pushButton-setEnabled(1);ui-pushButton_2-setEnabled(1);}
}
//按下显示密码
void Widget::on_pushButton_3_pressed()
{ui-lineEdit_2-setEchoMode(QLineEdit::Normal);
}
//显示密码按钮弹起
void Widget::on_pushButton_3_released()
{ui-lineEdit_2-setEchoMode(QLineEdit::Password);
}void Widget::on_pushButton_clicked()
{QString nameui-lineEdit-text();QListQListWidgetItem * itemui-listWidget-findItems(name,Qt::MatchExactly);if(item.isEmpty()){ui-listWidget-addItem(name);}}void Widget::on_listWidget_itemDoubleClicked(QListWidgetItem *item)
{int row ui-listWidget-row(item);delete ui-listWidget-takeItem(row);
}main.cpp
#include widget.h#include QApplicationint main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}2.完成一个计算器ui界面如下 完成 -*/计算功能并且在对应位置显示对应的数据
widget.h
#ifndef WIDGET_H
#define WIDGET_H#include QWidget
#include QStringQT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACEclass Widget : public QWidget
{Q_OBJECTpublic:Widget(QWidget *parent nullptr);~Widget();private slots:void on_pushButton_13_clicked();void on_pushButton_14_clicked();void on_pushButton_15_clicked();void on_pushButton_9_clicked();void on_pushButton_10_clicked();void on_pushButton_11_clicked();void on_pushButton_5_clicked();void on_pushButton_6_clicked();void on_pushButton_7_clicked();void on_pushButton_2_clicked();void on_pushButton_clicked();void on_pushButton_4_clicked();void on_pushButton_8_clicked();void on_pushButton_12_clicked();void on_pushButton_16_clicked();void on_pushButton_3_clicked();private:Ui::Widget *ui;QString first;QString symbol;QString second;QString equal;int falg;
};
#endif // WIDGET_Hwidget.cpp
#include widget.h
#include ui_widget.hWidget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget),falg(0)
{ui-setupUi(this);
}Widget::~Widget()
{delete ui;
}// 1
void Widget::on_pushButton_13_clicked()
{if(falg0){first1;ui-lineEdit-setText(first);}else if(falg1){second1;ui-lineEdit_2-setText(second);}
}
// 2
void Widget::on_pushButton_14_clicked()
{if(falg0){first2;ui-lineEdit-setText(first);}else if(falg1){second2;ui-lineEdit_2-setText(second);}
}
// 3
void Widget::on_pushButton_15_clicked()
{if(falg0){first3;ui-lineEdit-setText(first);}else if(falg1){second3;ui-lineEdit_2-setText(second);}
}
// 4
void Widget::on_pushButton_9_clicked()
{if(falg0){first4;ui-lineEdit-setText(first);}else if(falg1){second4;ui-lineEdit_2-setText(second);}
}
// 5
void Widget::on_pushButton_10_clicked()
{if(falg0){first5;ui-lineEdit-setText(first);}else if(falg1){second5;ui-lineEdit_2-setText(second);}
}
// 6
void Widget::on_pushButton_11_clicked()
{if(falg0){first6;ui-lineEdit-setText(first);}else if(falg1){second6;ui-lineEdit_2-setText(second);}
}
// 7
void Widget::on_pushButton_5_clicked()
{if(falg0){first7;ui-lineEdit-setText(first);}else if(falg1){second7;ui-lineEdit_2-setText(second);}
}
// 8
void Widget::on_pushButton_6_clicked()
{if(falg0){first8;ui-lineEdit-setText(first);}else if(falg1){second8;ui-lineEdit_2-setText(second);}
}
// 9
void Widget::on_pushButton_7_clicked()
{if(falg0){first9;ui-lineEdit-setText(first);}else if(falg1){second9;ui-lineEdit_2-setText(second);}
}
// 0
void Widget::on_pushButton_2_clicked()
{if(falg0){first0;ui-lineEdit-setText(first);}else if(falg1){second0;ui-lineEdit_2-setText(second);}
}
// C
void Widget::on_pushButton_clicked()
{first.clear();ui-lineEdit-setText(first);second.clear();ui-lineEdit_2-setText(second);symbol.clear();ui-label-setText(symbol);equal.clear();ui-lineEdit_3-setText(equal);falg0;
}
//
void Widget::on_pushButton_4_clicked()
{falg1;symbol;ui-label-setText(symbol);
}
// -
void Widget::on_pushButton_8_clicked()
{falg1;symbol-;ui-label-setText(symbol);
}
// *
void Widget::on_pushButton_12_clicked()
{falg1;symbol*;ui-label-setText(symbol);
}
// ‘/’
void Widget::on_pushButton_16_clicked()
{falg1;symbol/;ui-label-setText(symbol);
}
//
void Widget::on_pushButton_3_clicked()
{falg2;double fatoi(first.toLocal8Bit().data());double satoi(second.toLocal8Bit().data());if(symbol){double resultfs;QString r;r.setNum(result);ui-lineEdit_3-setText(r);}else if(symbol-){double resultf-s;QString r;r.setNum(result);ui-lineEdit_3-setText(r);}else if(symbol*){double resultf*s;QString r;r.setNum(result);ui-lineEdit_3-setText(r);}else{double resultf/s;QString r;r.setNum(result);ui-lineEdit_3-setText(r);}}main.cpp
#include widget.h#include QApplicationint main(int argc, char *argv[])
{QApplication a(argc, argv);Widget w;w.show();return a.exec();
}
