DelphiXe 中靜態數組TByteArray和動態數組TBytes /array of byte 的區別

在應用中發現靜態數組和動態數組是有區別的：

procedure TForm1.Button1Click(Sender: TObject);
var
  RsltStream: TMemoryStream;
  picBuffer: TByteArray;
begin
  RsltStream := TMemoryStream.Create;
  RsltStream.LoadFromFile('e:\pic.txt');
  RsltStream.Position := 0;                                        // 流讀取操作前必須將指針回到起始位
  RsltStream.ReadBuffer(picBuffer,RsltStream.Size);    //靜態數組中picBuffer 和picBuffer[0] 的指針是相同的
end;

 

procedure TForm1.Button1Click(Sender: TObject);
var
  RsltStream: TMemoryStream;
  picBuffer: TBytes;   //array of byte
begin
  RsltStream := TMemoryStream.Create;
  RsltStream.LoadFromFile('e:\pic.txt');
  RsltStream.Position := 0;                                           // 流讀取操作前必須將指針回到起始位

  setlength(picBuffer, RsltStream.Size);                         //給動態數組定義長度
  RsltStream.ReadBuffer(picBuffer[0],RsltStream.Size);   //動態數組中必須用picBuffer[0] ，否則地址錯誤，數據也是錯誤的

end;

轉自：http://www.cnblogs.com/wxy8/archive/2011/01/28/1946921.html