标准输入框

最新推荐文章于 2020-09-07 08:50:00 发布

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最新推荐文章于 2020-09-07 08:50:00 发布

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分类专栏： Qt

本文链接：https://blog.youkuaiyun.com/Yejianyun1/article/details/46275339

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本文详细介绍了Qt库中QInputDialog类的使用方法，包括字符串、整数、浮点数和下拉列表四种类型的输入框。通过实例展示了如何创建并操作这些输入框，获取用户输入，并更新界面上的显示。适用于Qt应用程序开发人员。

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在Qt中，QInputDialog类中提供了简单的输入对话框用来获得用户的输入信息，目前包含4中数据类型的输入，字符串、Int类型，Double类型、以及下拉列表。

使用方法通过简单的例子说明，

若调用字符串输入框则设置为一个LineEdit，如果是Int、Double类型的输入框，则为一个QspinBox，如果是调用列表条目输入框，则为一个QComboBox;

使用方法参考：

//输入字符串QlineEdit

void Dialog::slotName()

    bool ok;

    QString name = QInputDialog::getText(this,tr("User anme"),tr("please input new name:"),QLineEdit::Normal,lableName->text(),&ok);

    if(ok && !name.isEmpty())

        lableName->setText(name);

//调用一个列表条目,QComboBox

void Dialog::slotSex()

    QStringList list;

    bool ok;

    list << tr("male")<<tr("female");

    QString sex = QInputDialog::getItem(this,tr("Sex"),tr("please input new sex:"),list,0,false,&ok);

    if(ok)

        lableSex->setText(sex);

//输入Int型，是一个QspinBox

void Dialog::slotAge()

    bool ok;

    //添加一个可以加减的符号

    int age = QInputDialog::getInt(this,tr("age"),tr("please input new age:"),lableAge->text().toInt(),0,150,1,&ok);

    if(ok)

        lableAge->setText(QString("%1").arg(age));

void Dialog::slotStature()

    bool ok;

    double stature = QInputDialog::getDouble(this,tr("stature"),tr("please input new stature:"),175.00,0,230.00,1,&ok);

    if(ok)

        lableStature->setText(QString(tr("%1").arg(stature)));

完整代码：

dialog.h

#ifndef DIALOG_H

#define DIALOG_H

#include <QDialog>

#include <QGridLayout>

#include <QPushButton>

#include <QLabel>

#include <QString>

#include <QInputDialog>

#include <QStringList>

namespace Ui {

class Dialog;

class Dialog : public QDialog

    Q_OBJECT

public:

    QGridLayout* layout;

    //修改按钮

    QPushButton* nameButton;

    QPushButton* sexButton;

    QPushButton* ageButton;

    QPushButton* statureButton;

    //标签

    QLabel* nameLable;

    QLabel* sexLable;

    QLabel* ageLable;

    QLabel* statureLable;

    //提示标签

    QLabel* lableName;

    QLabel* lableSex;

    QLabel* lableAge;

    QLabel* lableStature;

private slots:

    void slotName();

    void slotSex();

    void slotAge();

    void slotStature();

public:

    explicit Dialog(QWidget *parent = 0);

    ~Dialog();

private:

    Ui::Dialog *ui;

};

#endif // DIALOG_H

dialog.cpp

#include "dialog.h"

#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::Dialog)

    ui->setupUi(this);

    setWindowTitle(tr("input dialog"));

    nameLable = new QLabel;

    nameLable->setText(tr("姓名:"));

    sexLable = new QLabel;

    sexLable->setText(tr("性别:"));

    ageLable = new QLabel;

    ageLable->setText(tr("年龄:"));

    statureLable = new QLabel;

    statureLable->setText(tr("身高:"));

    //创建各个提示标签

    lableName = new QLabel(tr("李明"));

    lableName->setFrameStyle(QFrame::Panel|QFrame::Sunken);

    lableSex = new QLabel(tr("男"));

    lableSex->setFrameStyle(QFrame::Panel|QFrame::Sunken);

    lableAge = new QLabel(tr("22"));

    lableAge->setFrameStyle(QFrame::Panel|QFrame::Sunken);

    lableStature = new QLabel;

    lableStature->setFrameStyle(QFrame::Panel|QFrame::Sunken);

    nameButton = new QPushButton;

    nameButton->setText(tr("..."));

    sexButton = new QPushButton;

    sexButton->setText(tr("..."));

    ageButton = new QPushButton;

    ageButton->setText(tr("..."));

    statureButton = new QPushButton;

    statureButton->setText(tr("..."));

    layout = new QGridLayout(this);

    layout->addWidget(nameLable,0,0);

    layout->addWidget(lableName,0,1);

    layout->addWidget(nameButton,0,2);

    layout->addWidget(sexLable,1,0);

    layout->addWidget(lableSex,1,1);

    layout->addWidget(sexButton,1,2);

    layout->addWidget(ageLable,2,0);

    layout->addWidget(lableAge,2,1);

    layout->addWidget(ageButton,2,2);

    layout->addWidget(statureLable,3,0);

    layout->addWidget(lableStature,3,1);

    layout->addWidget(statureButton,3,2);

    connect(nameButton,SIGNAL(clicked()),this,SLOT(slotName()));

    connect(sexButton,SIGNAL(clicked()),this,SLOT(slotSex()));

    connect(ageButton,SIGNAL(clicked()),this,SLOT(slotAge()));

    connect(statureButton,SIGNAL(clicked()),this,SLOT(slotStature()));

//输入字符串QlineEdit

void Dialog::slotName()

    bool ok;

    QString name = QInputDialog::getText(this,tr("User anme"),tr("please input new name:"),QLineEdit::Normal,lableName->text(),&ok);

    if(ok && !name.isEmpty())

        lableName->setText(name);

//调用一个列表条目,QComboBox

void Dialog::slotSex()

    QStringList list;

    bool ok;

    list << tr("male")<<tr("female");

    QString sex = QInputDialog::getItem(this,tr("Sex"),tr("please input new sex:"),list,0,false,&ok);

    if(ok)

        lableSex->setText(sex);

//输入Int型，是一个QspinBox

void Dialog::slotAge()

    bool ok;

    //添加一个可以加减的符号

    int age = QInputDialog::getInt(this,tr("age"),tr("please input new age:"),lableAge->text().toInt(),0,150,1,&ok);

    if(ok)

        lableAge->setText(QString("%1").arg(age));

void Dialog::slotStature()

    bool ok;

    double stature = QInputDialog::getDouble(this,tr("stature"),tr("please input new stature:"),175.00,0,230.00,1,&ok);

    if(ok)

        lableStature->setText(QString(tr("%1").arg(stature)));

Dialog::~Dialog()

    delete ui;