Qt添加icon图标（主要用于treeview或tableview的item前）

1.头文件内定义

#ifndef SELECTDEVICE_H

#define SELECTDEVICE_H

#include "facelist.h"

#include <QPersistentModelIndex>

#include <QModelIndex>

#include <QStandardItem>

#include <QStandardItemModel>

#include <QDialog>

#ifndef TREE_ITEM_ICON_folder

#define TREE_ITEM_ICON_folder QStringLiteral("treeItem_folder")

#endif

#ifndef TREE_ITEM_ICON_DataItem

#define TREE_ITEM_ICON_DataItem QStringLiteral("treeItem_dataItem")

#endif

#ifndef TREE_ITEM_ICON_TdmsGroup

#define TREE_ITEM_ICON_TdmsGroup QStringLiteral("treeItem_group")

#endif

namespace Ui {

class SelectDevice;

}

class SelectDevice : public QDialog

{

    Q_OBJECT

public:

    explicit SelectDevice(QWidget *parent = 0);

    ~SelectDevice();

    string retidstr;

    string retnamestr;

    QList<facelist*>selectdev;

    QList<QPersistentModelIndex> m_checkedList;

    void beginselect();

protected:

    void paintEvent(QPaintEvent *);

    void mousePressEvent(QMouseEvent *event);

    void mouseReleaseEvent(QMouseEvent *event);

    void mouseMoveEvent(QMouseEvent *event);

private slots:

    void treeItemChanged(QStandardItem * item);

    void treeItem_checkAllChild(QStandardItem * item, bool check);

    void treeItem_checkAllChild_recursion(QStandardItem * item,bool check);

    Qt::CheckState checkSibling(QStandardItem * item);

    void treeItem_CheckChildChanged(QStandardItem * item);

    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

    void on_pushButton_3_clicked();

private:

    Ui::SelectDevice *ui;

    QMap<QString,QIcon> m_publicIconMap;///< 存放公共图标

};

#endif // SELECTDEVICE_H

2.添加资源文件

3.在cpp文件中加载图片

    m_publicIconMap[TREE_ITEM_ICON_DataItem] = QIcon(QStringLiteral(":/TreeIcon/TreeIcon/dataItem.png"));

    m_publicIconMap[TREE_ITEM_ICON_folder] = QIcon(QStringLiteral(":/TreeIcon/TreeIcon/folder.png"));

    m_publicIconMap[TREE_ITEM_ICON_TdmsGroup] = QIcon(QStringLiteral(":/TreeIcon/TreeIcon/group.png"));

4,使用

  QStandardItem *item = new QStandardItem(m_publicIconMap[QStringLiteral("treeItem_folder")],QString::fromUtf8("XX列表"));