QT学习笔记（五）登录注册、打开保存文件

// 模态对话框

void Widget::on_pushButton_2_clicked()

{

    Login dlg;

    // 会接管 app 的 exec,处理消息事件

    int ret = dlg.exec();

    if (ret == QDialog::Accepted)      // 调用accept函数结束窗口返回  Accepted

        qDebug() << "登录成功";

    else if (ret == QDialog::Rejected) // 调用reject函数结束窗口返回  Rejected

        qDebug() << "登录失败";

}

void Widget::on_pushButton_3_clicked()

{

    QColorDialog dlg;

    QColor c = dlg.getColor();

    qDebug() << c;

}

void Widget::on_pushButton_4_clicked()

{

    QFontDialog dlg;

    bool ok;

    QFont f = dlg.getFont(&ok);

    qDebug() << f;

}

void Widget::on_pushButton_5_clicked()

{

    QString fileName = QFileDialog::getOpenFileName(this, "Open File",

                                                    "../",

                                                    "Images (*.png *.xpm *.jpg);;"

                                                    "source files (*.c *.cpp *.hpp *.cc);;"

                                                    "header files (*.h);;"

                                                    "ALL(*)");

    qDebug() << "要打开的文件：" << fileName;

}

void Widget::on_pushButton_6_clicked()

{

    QString fileName = QFileDialog::getSaveFileName(this, "save File",

                                                    "../",

                                                    "Images (*.png *.xpm *.jpg);;"

                                                    "source files (*.c *.cpp *.hpp *.cc);;"

                                                    "header files (*.h);;"

                                                    "ALL(*)");

    qDebug() << "要保存的文件：" << fileName;

}

需要头文件

#ifndef LOGIN_H

#define LOGIN_H

#include 

namespace Ui {

class Login;

}

class Login : public QDialog

{

    Q_OBJECT

public:

    explicit Login(QWidget *parent = 0);

    ~Login();

private slots:

    void on_pushButton_clicked();

private:

    Ui::Login *ui;

};

#endif // LOGIN_H