好人帮忙看一下,释放接口实现对象时报错?!
type
IShowMsg = interface
procedure ShowCalssName;
end;
T_A= class(TInterfacedObject,IShowMsg)
public
procedure ShowCalssName;
end;
//------------------------------------------
procedure TForm1.Button1Click(Sender: TObject);
var
II : IShowMsg;
ca : T_A;
begin
ca := T_A.Create;
try
II := ca;
II.ShowCalssName;
II := nil;
finally
//FreeAndNil(ca); //释放时报错!
end;
end;