//===============Micros===============

//singletondeclare

#defineDECLARE_SHARE(ClassName)\

private:\

staticClassName*singleInstance;\

public:\

staticClassName*shareInstance()\

{\

if(NULL==singleInstance)singleInstance=newClassName();\

returnsingleInstance;\

}\

private:\

classCGarbo\

{\

public:\

~CGarbo()\
 

{if(ClassName::singleInstance)deleteClassName::singleInstance;}\

};\

staticCGarboGarbo;

//

#defineBUILD_SHARE(ClassName)\

ClassName*ClassName::singleInstance=NULL;

使用方式:

單例類標頭檔案中需要引用包含該巨集的標頭檔案,並在宣告中使用該巨集的 DECLARE_SHARE() 

而類實現中需要在一開始 BUILD_SHARE()

例:

//dlgmain.h

classDlgMain:publicQDialog

{

Q_OBJECT
 

DECLARE_SHARE(DlgMain)

public:

explicitDlgMain(QWidget*parent=0);

~DlgMain();

}

//dlgmain.cpp

#include"dlgmain.h"

BUILD_SHARE(DlgMain)

DlgMain::DlgMain(QWidget*parent):

QDialog(parent),

ui(newUi::DlgMain)

{

ui->setupUi(this);

...

}

...