Qt static关键字全局变量

创建全局变量.h文件

globalvariable.h

#ifndef GLOBALVARIABLE_H
#define GLOBALVARIABLE_H
#include <QImage>

//全局变量
class GlobalVariable
{
public:
    //图像变量
    static   QImage     GV_QImage;
};

main.cpp

#include "XXXXX.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    JaiCamera w;
    w.show();

    return a.exec();
}

//全局变量初始化
QImage   GlobalVariable::GV_QImage;

需要用到的.cpp程序里

GlobalVariable::GV_QImage = XXXXXX;