Delphi 之 定时器 (TTimer组件)

procedure TForm1.FormCreate(Sender: TObject);
begin
  timer1.Enabled:= False;
  Timer2.Enabled:= False;
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
  Edit1.Text:= IntToStr(strtoint(Edit1.text)+1);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
  Timer1.Enabled:=True;
  Caption:=‘计时开始‘;
  Timer2.Enabled:= False;
end;
procedure TForm1.Timer2Timer(Sender: TObject);
begin
     Edit2.Text:= IntToStr(strtoint(Edit2.text)-1);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
  Timer2.Enabled:= True;
  Caption:=‘倒计时开始‘;
  Timer1.Enabled:=False;
end;
end.

procedure TForm1.Timer1Timer(Sender: TObject);
begin
  label1.Caption:= DateTimeToStr(Now());

end;