#include "ccmychardialog.h"
public slots:
    void ccmyclose();

emit myclose();

#include "dialog.h"
public slots:
    void ccmyclose();
        myCCmyCharDialog = new CCmyCharDialog(tcpSocket);
    //綁定關閉信號與槽
         connect(myCCmyCharDialog,SIGNAL(myclose()),this,SLOT(ccmyclose()));
 

不然綁定不了報：

QObject::connect: Cannot connect (null)::myclose() to Dialog::ccmyclose()

qt 信號與槽