Qt QSpinBox详解

朱雀 2022-10-30 10:23 445阅读 0赞

# 1.SpinBox #

QSpinBox用于整数的显示和输入，一般显示十进制，也可以显示二进制、十六进制的数，也可以在框中增加前缀和后缀。

QDoubleSpinBox和QSpinBox用法差不多，用于浮点数的显示和输入

# 2.运行截图  #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70][]

#  3.源码  #

**ui界面**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70 1][]

//.h文件
    
    #ifndef WIDGET_H
    #define WIDGET_H
    
    #include <QWidget>
    
    namespace Ui {
    class Widget;
    }
    
    class Widget : public QWidget
    {
        Q_OBJECT
    
    public:
        explicit Widget(QWidget *parent = 0);
        ~Widget();
    
    private slots:
        void on_pushButton_clicked();
    
    private:
        Ui::Widget *ui;
    };
    
    #endif // WIDGET_H

//.cpp文件
    
    #include "widget.h"
    #include "ui_widget.h"
    
    Widget::Widget(QWidget *parent) :
        QWidget(parent),
        ui(new Ui::Widget)
    {
        ui->setupUi(this);
    
        //设置后缀
        ui->spinBoxNum->setSuffix("kg");
        //设置最小值
        ui->spinBoxNum->setMinimum(0);
        //设置最大值
        ui->spinBoxNum->setMaximum(100);
        //设置每次改变多少
        ui->spinBoxNum->setSingleStep(1);
    
        //设置前缀
        ui->doubleSpinBoxPer->setPrefix("$");
        //设置最小值
        ui->doubleSpinBoxPer->setMinimum(0);
        //设置最大值
        ui->doubleSpinBoxPer->setMaximum(100);
        //设置每次改变多少
        ui->doubleSpinBoxPer->setSingleStep(1);
        //设置精度
        ui->doubleSpinBoxPer->setDecimals(2);
    
        //设置后缀
        ui->doubleSpinBoxTotal->setPrefix("$");
    }
    
    Widget::~Widget()
    {
        delete ui;
    }
    
    void Widget::on_pushButton_clicked()
    {
        int valueNum = ui->spinBoxNum->value();
        double valuePer = ui->doubleSpinBoxPer->value();
        ui->doubleSpinBoxTotal->setValue(valueNum * valuePer);
    }

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d6ejk1MzIwMDQ2Mw_size_16_color_FFFFFF_t_70 1]: /images/20221024/38aa325c478740bf8c22a3619fab7bcf.png