Qt 字符映射表 显示图标

#ifndef FONTICONS_H
#define FONTICONS_H

#include <QFont>
#include <QObject>
//字符映射表 segmdl2.ttf
class FontIcons
{

public:
    enum IconsId{
        ICONS_SCAN=0xE294,
        ICONS_BROWSE=0xE7C5,
        ICONS_IMAGE_ACQ=0xE722,
        ICONS_PARAM_SET=0xE713,
        ICONS_PREVIEW_IMAGE=0xE7B3,
        ICONS_EXIT_APP=0xE8BB,
        ICONS_MODIFY=0xE104,
        ICONS_CONFIRM_MODIFY=0xE0E7,
        ICONS_LEFT_ARROW=0xF744,
        ICONS_RIGHT_ARROW=0xF745,
        ICONS_ABOUT_APP=0xE19F,
        ICONS_EXIT_PALLET=0xE176,//退出托盘
        ICONS_MANGNIFY=0xE8A3,
    };
    static FontIcons *getInstance();
    void init();
    void setFontSize(int size);
    QFont getFont();
    QChar getIconChar(FontIcons::IconsId code);
    QString getIconText(FontIcons::IconsId code,QString text);

private:
    FontIcons();
    static FontIcons* instance_;
    QFont font_;
    int  fontSize_;

};

#endif // FONTICONS_H

#include "fonticons.h"
#include <QFontDatabase>
#include <QDebug>
FontIcons* FontIcons::instance_ = new FontIcons;
FontIcons::FontIcons()
{

}
FontIcons* FontIcons::getInstance()
{
    return instance_;
}

void FontIcons::init()
{
   int fontId = QFontDatabase::addApplicationFont(":/three_parts/Fonts/segmdl2.ttf");
   QStringList fontFamilies = QFontDatabase::applicationFontFamilies(fontId);  
   font_.setFamily(fontFamilies.at(0));

}

void FontIcons::setFontSize(int size)
{  
    font_.setPointSize(size);
}

QFont FontIcons::getFont()
{
    return font_;
}

QChar FontIcons::getIconChar(FontIcons::IconsId code)
{
    return QChar((int)code);
}

QString FontIcons::getIconText(FontIcons::IconsId code, QString text)
{ 
     QString txt = QString("%1%2").arg(getIconChar(code)).arg(text);   
     return txt;
}

QPushButton *btnNavExitApp=new QPushButton(this);
FontIcons *fontIcons=FontIcons::getInstance();
fontIcons->init();
fontIcons->setFontSize(14);
btnNavExitApp->setText(fontIcons->getIconText(FontIcons::ICONS_EXIT_APP,QString::fromLocal8Bit(" 退出应用")));