使用多线程实现打字效果

 

 

使用多线程实现打字效果

unit Unit1;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Memo2: TMemo;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }  procedure DisplaySlowText ();
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  TThread.CreateAnonymousThread(DisplaySlowText).Start; //!!!

end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  TThread.CreateAnonymousThread(DisplaySlowText).Terminate;    //无效
end;

procedure TForm1.DisplaySlowText();
var
   i : Integer;
   S : String;
begin
    s:=Memo2.Text;
    for i := 1 to Length(S) do
     begin
         Memo1.SelStart:=Length(Memo1.Text);
         Memo1.SetSelText(s[i]);
         Sleep (50);
     end;
      Memo1.SetFocus;
end;



end.