hello~my slot has been connected but the slot function can't be called

[me_JL]

Can U tell me why~Ps.I use GUI in the slot indirectly~

[Lykurg]

No, how could we? We don't see your code...

[me_JL]

en I will show my code if necessary~My project is sth like this:

Class A{
Q_OBJECT 
public slots：
  void slot();
public: 
  B b;
  A()
} ; 
 
Class B{
Q_OBJECT 
signals:
  void signal();
}
 
A::A()
{
  connect(b,SIGNAL(signal()),this,SLOT(slot()));
}    
 
main(){
A *a;
a=new A;
 a=new A;
}

Class A{
Q_OBJECT 
public slots：
  void slot();
public: 
  B b;
  A()
} ; 

Class B{
Q_OBJECT 
signals:
  void signal();
}
 
A::A()
{
  connect(b,SIGNAL(signal()),this,SLOT(slot()));
}    

main(){
A *a;
a=new A;
 a=new A;
}

To copy to clipboard, switch view to plain text mode 

the pointer point to another member of class A before delete it. My question is,can the system find the former 'A' and run the slot() function without a pointer pointing to it.