Qt加载图标字体库fontawesome_qchar(0xf068)

一、概述

在编写qt界面的过程中，经常会使用到一些图标字体。fontawesome是一个很不错的图标字体库，通过使用fontawesome可以显示很多图标。

fontawesom官网：fontawesome图标字体库

二、调用方法

把fontawesome-webfont.ttf加载到资源文件

直接上干货，头文件如下：

#ifndef ICONHELPER_H
#define ICONHELPER_H
 
#include <QObject>
#include <QFont>
#include <QFontDatabase>
#include <QMutex>
#include <QLabel>
#include <QPushButton>
#include<QToolButton>
#include <QApplication>
 
class IconHelper : public QObject
{
private:
    explicit IconHelper(QObject *parent = 0);
    QFont iconFont;
    static IconHelper* _instance;
 
public:
    static IconHelper* Instance()
    {
        static QMutex mutex;
        if (!_instance) {
            QMutexLocker locker(&mutex);
            if (!_instance) {
                _instance = new IconHelper;
            }
        }
        return _instance;
    }
 
    void SetIcon(QLabel* lab, QChar c, int size = 10);
    void SetIcon(QPushButton* btn, QChar c, int size = 10);
    void SetIcon(QToolButton* btn, QChar c, int size = 10);
 
};
 
#endif // ICONHELPER_H

CPP文件如下：

#include "iconhelper.h"
 
IconHelper* IconHelper::_instance = 0;
IconHelper::IconHelper(QObject*):
    QObject(qApp)
{
    int fontId = QFontDatabase::addApplicationFont(":/image/fontawesome-webfont.ttf");
    QString fontName = QFontDatabase::applicationFontFamilies(fontId).at(0);
    iconFont = QFont(fontName);
}
 
void IconHelper::SetIcon(QLabel* lab, QChar c, int size)
{
    iconFont.setPointSize(size);
    lab->setFont(iconFont);
    lab->setText(c);
}
 
void IconHelper::SetIcon(QPushButton* btn, QChar c, int size)
{
    iconFont.setPointSize(size);
    btn->setFont(iconFont);
    btn->setText(c);
}
void IconHelper::SetIcon(QToolButton* btn, QChar c, int size)
{
    iconFont.setPointSize(size);
    btn->setFont(iconFont);
    btn->setText(c);
}

调用

    IconHelper::Instance()->SetIcon(ui->closeBtn, QChar(0xf00d), 10);
    IconHelper::Instance()->SetIcon(ui->maxBtn, QChar(0xf096), 10);
    IconHelper::Instance()->SetIcon(ui->minimumBtn, QChar(0xf068), 10);

运行效果截图：

fontawesome图标对应字符截图：

下载链接：https://download.csdn.net/download/weixin_41882459/12748864