字体对话框QFontDialog、消息对话框 QMessageBox和输入对话框 QInputDialog

本文主要是介绍字体对话框QFontDialog、消息对话框 QMessageBox和输入对话框 QInputDialog，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

界面如下

1. 字体对话框 QFontDialog

1.1 基本函数

 QFont getFont(bool *ok, const QFont &initial, QWidget *parent = nullptr, const QString &title = QString(), QFontDialog::FontDialogOptions options = FontDialogOptions())

返回值：QFont类型--字体

参数1：如果字体设置成功，ok返回true，否则返回false

参数2：设置初始字体

参数3：指定父对象

参数4：指定对话框标题

 QFont getFont(bool *ok, QWidget *parent = nullptr)

返回值：QFont类型--字体

参数1：如果字体设置成功，ok返回true，否则返回false

参数2：指定父对象

1.2 示例

QDialog

dialog.cpp

//字体对话框
void Dialog::on_pushButton_clicked()
{bool ok = false;//选择字体等信息,选择完后后保存在fontQFont font = QFontDialog::getFont(&ok,this);if(ok){qDebug()<<"字体设置成功"<<endl;}//这里可以将我们上次保存的font里的字体信息，作为再次设置字体的默认值
//    QFontDialog::getFont(&ok,font,this,"字体对话框");
}

点击

2. 消息对话框 QMessageBox

2.1 基本函数

关于类型

void about(QWidget *parent, const QString &title, const QString &text)  //about关于

void aboutQt(QWidget *parent, const QString &title = QString())

有争议类型

QMessageBox::StandardButton critical(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons = Ok, QMessageBox::StandardButton defaultButton = NoButton) //critical有争议

信息提示类型

QMessageBox::StandardButton information(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons = Ok, QMessageBox::StandardButton defaultButton = NoButton) //信息提示

返回值：QMessageBox::StandardButton返回按钮

参数1：指定父对象

参数2：指定标题

参数3：指定提示的文本

参数4：指定对话框中的按钮

参数5：设置默认按钮

有疑问类型

QMessageBox::StandardButton question(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons = StandardButtons(Yes | No), QMessageBox::StandardButton defaultButton = NoButton)//有疑问

警告类型

 QMessageBox::StandardButton warning(QWidget *parent, const QString &title, const QString &text, QMessageBox::StandardButtons buttons = Ok, QMessageBox::StandardButton defaultButton = NoButton)  //警告

2.2 示例

参数4 指定对话框中的按钮的参数

QMessageBox::Ok           An"OK" button defined with the AcceptRole.
QMessageBox::Open        An "Open" button defined with the AcceptRole.
QMessageBox::Save        A "Save" button defined with the AcceptRole.
QMessageBox::Cancel        A "Cancel" button defined with the RejectRole.
QMessageBox::Close        A "Close" button defined with the RejectRole.
QMessageBox::Discard        A "Discard" or "Don't Save" button, depending on the platform, defined with the DestructiveRole.
QMessageBox::Apply        An "Apply" button defined with the ApplyRole.
QMessageBox::Reset        A "Reset" button defined with the ResetRole.
QMessageBox::RestoreDefaults        A "Restore Defaults" button defined with the ResetRole.
QMessageBox::Help            A "Help" button defined with the HelpRole.
QMessageBox::SaveAll        A "Save All" button defined with the AcceptRole.
QMessageBox::Yes            A "Yes" button defined with the YesRole.
QMessageBox::YesToAll        A "Yes to All" button defined with the YesRole.
QMessageBox::No            A "No" button defined with the NoRole.
QMessageBox::NoToAll        A "No to All" button defined with the NoRole.
QMessageBox::Abort        An "Abort" button defined with the RejectRole.
QMessageBox::Retry        A "Retry" button defined with the AcceptRole.
QMessageBox::Ignore        An "Ignore" button defined with the AcceptRole.
QMessageBox::NoButton        An invalid button.

QDialog

dialog.cpp

//消息对话框
void Dialog::on_pushButton_2_clicked()
{//弹出提示框，提示一些关于qt的东西
//    QMessageBox::aboutQt(this,"关于Qt的一些基本信息");//信息提示类型
//    QMessageBox::StandardButton btn=QMessageBox::information(this,"information","今天是星期五",QMessageBox::Ok|QMessageBox::Close);
//    if(btn==QMessageBox::Ok)
//    {
//        qDebug()<<"用户已经知晓"<<endl;//    }
//    else if(btn==QMessageBox::Close)
//    {
//        qDebug()<<"用户关闭"<<endl;
//    }//问题类型QMessageBox::StandardButton btn=QMessageBox::question(this,"question","你今天开心吗？",QMessageBox::Ok|QMessageBox::Close);if(btn==QMessageBox::Ok){qDebug()<<"我开心"<<endl;}else if(btn==QMessageBox::Close){qDebug()<<"不开心"<<endl;}}

3. 输入对话框 QInputDialog

3.1 基本函数

输入double类型

double getDouble(QWidget *parent, const QString &title, const QString &label, double value = 0, double min = -2147483647, double max = 2147483647, int decimals = 1, bool *ok = nullptr, Qt::WindowFlags flags = Qt::WindowFlags(), double step = 1)

返回值：double，获取double类型的数据

参数1：指定父对象

参数2：指定标题

参数3：设置标签（提示的文本）

参数4：设置输入对话框显示的当前值

参数5：设置最小值

参数6：设置最大值

参数7：设置小数位数

参数8：设置输入是否成功的标志

参数9：设置window的标志

参数10：设置步进值

输入intleixing

int getInt(QWidget *parent, const QString &title, const QString &label, int value = 0, int min = -2147483647, int max = 2147483647, int step = 1, bool *ok = nullptr, Qt::WindowFlags flags = Qt::WindowFlags())

返回值：int 获取int 类型的数据

参数1：指定父对象

参数2：指定标题

参数3：设置标签（提示的文本）

参数4：设置输入对话框显示的当前值

参数5：设置最小值

参数6：设置最大值

参数7：设置步进值

参数8：设置输入是否成功的标志

参数9：设置window的标志

一些其他的类型的函数原型

QString getItem(QWidget *parent, const QString &title, const QString &label, const QStringList &items, int current = 0, bool editable = true, bool *ok = nullptr, Qt::WindowFlags flags = Qt::WindowFlags(), Qt::InputMethodHints inputMethodHints = Qt::ImhNone)QString getMultiLineText(QWidget *parent, const QString &title, const QString &label, const QString &text = QString(), bool *ok = nullptr, Qt::WindowFlags flags = Qt::WindowFlags(), Qt::InputMethodHints inputMethodHints = Qt::ImhNone)QString getText(QWidget *parent, const QString &title, const QString &label, QLineEdit::EchoMode mode = QLineEdit::Normal, const QString &text = QString(), bool *ok = nullptr, Qt::WindowFlags flags = Qt::WindowFlags(), Qt::InputMethodHints inputMethodHints = Qt::ImhNone)

3.2 示例

QDialog

dialog.cpp

//输入对话框
void Dialog::on_pushButton_3_clicked()
{bool ok=false;//输入double类型的数据double value=QInputDialog::getDouble(this,"输入对话框","请输入double类型的数据：",0.00,0.00,100.00,2,&ok,Qt::WindowFlags(),0.01);if(ok){qDebug()<<"value="<<value<<endl;}//上面的getDoble函数有的参数有默认参数，可以不写直接省略，如下
//    double value = QInputDialog::getDouble(this,"输入对话框","请输入double类型");//    qDebug()<<"value="<<value<<endl;}