Qt static关键字全局变量

创建全局变量.h文件

globalvariable.h

 1 #ifndef GLOBALVARIABLE_H
 2 #define GLOBALVARIABLE_H
 3 #include <QImage>
 4 
 5 //全局变量
 6 class GlobalVariable
 7 {
 8 public:
 9     //图像变量
10     static   QImage     GV_QImage;
11 };

main.cpp

 1 #include "XXXXX.h"
 2 #include <QApplication>
 3 
 4 int main(int argc, char *argv[])
 5 {
 6     QApplication a(argc, argv);
 7     JaiCamera w;
 8     w.show();
 9 
10     return a.exec();
11 }
12 
13 //全局变量初始化
14 QImage   GlobalVariable::GV_QImage;

需要用到的.cpp程序里

GlobalVariable::GV_QImage = XXXXXX;