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;