类方法调用

unit Unit1;



interface



uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs;



type

  TForm1 = class(TForm)

    procedure FormCreate(Sender: TObject);

  private

    { Private declarations }

  public

    { Public declarations }

  end;



//类声明

  TMyClass = class

  public

    class procedure MyProc;  //类方式

    constructor Create;      //Create 也是类方法

  end;



var

  Form1: TForm1;



implementation



{$R *.dfm}



{ TMyClass }



constructor TMyClass.Create;

begin

  inherited;

  MyProc;  //内部调用类方法

end;



class procedure TMyClass.MyProc;

begin

  ShowMessage('ok');  //类方法实现

end;





procedure TForm1.FormCreate(Sender: TObject);

var

  MyClass1: TMyClass;

begin

  TMyClass.MyProc;  //用类名调用类方法，显示：ok

  MyClass1 := TMyClass.Create;  //内部调用类方法，显示：ok

  MyClass1.MyProc;  //对象调用类方法，显示：ok

  MyClass1.Free;

end;



end.