ComponentCount 与 ControlCount 区别

   ShowMessage(panel.ComponentCount.ToString);
  ShowMessage(panel.ControlCount.ToString);
componetcount怎么与 controlcount不一样  

 

 

procedure TForm4.btn4Click(Sender: TObject);

var

  I: Integer;

begin

  //测试ControlCount

  with TButton.Create(pnl1) do

  begin

    Parent := pnl1;

  end;

  with TButton.Create(pnl1) do

  begin

    Parent := Self;

  end;

  with TButton.Create(Self) do

  begin

    Parent := Self;

  end;

  with TButton.Create(Self) do

  begin

    Parent := pnl1;

  end;

  ShowMessage(pnl1.ControlCount.ToString);//结果是2

  ShowMessage(pnl1.ComponentCount.ToString);//结果是2

  //我的错误结论：

  //xxx.ControlCount --- 算的是 Owner 是xxx , parent也为xxx的 且是可视控件

  //xxx.ComponentCount  --- 算的是 owner 是xxx, parent为任何的组件(包含可视与非可视控件）

  //我师傅的正确结论死记：

//  controlcount与owner无关

//  只与parent有关

//  ComponentCount 与parent无关 只与 owner有关

end;

 

 pnl2中 包含一个 btn23和 pnl3
pnl3中包含一个 btn24