Lazarus - 为什么我不能将事件分配给运行时组件？

Question

我有这个Lazarus计划:

unit Unit2; 

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, LResources, Forms, Controls, Graphics, Dialogs,
  StdCtrls, ComCtrls;

type

  { TForm2 }

  TForm2 = class(TForm)
    procedure OnTlacitkoClick(Sender: TObject);
    procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
    procedure FormCreate(Sender: TObject);
    tlac:TButton;
  private
    { private declarations }
  public
    { public declarations }
  end;



var
  Form2: TForm2;

implementation

{ TForm2 }

procedure TForm2.OnTlacitkoClick(Sender: TObject);
begin
  showmessage('helloworld');
end;

procedure TForm2.FormCreate(Sender: TObject);
var i,j:integer;
begin
  tlac:=TButton.Create(Form2);
  tlac.OnClick:=OnTlacitkoClick;
  tlac.Parent:=Form2;
  tlac.Left:=100;
  tlac.Top:=100;
end;

initialization
  {$I unit2.lrs}

end.

但编译器说:unit2.pas(63,32)错误:在tlac.OnClick中调用"OnTlacitkoClick"时指定的参数数量错误:= OnTlacitkoClick; 表达.我搜索并认为这是德尔福的法律表达.我想简单地将OnTlacitkoClick注册为tlac.OnClick事件,而不是调用此过程.是否有一些错误的代码或我必须在Lazarus/Freepascal做不同的？

谢谢.

Answer 1

正如您已经发现的那样,添加@或启用Delphi模式.

在(obj)fpc模式中,显式@需要消除一些阴暗情况的歧义.