Inno Setup替换没有BOM的UTF-8文件中的字符串

const
  CP_UTF8 = 65001;

{ ... }
var
  FileName: string;
  S: string;
begin
  FileName := 'test.txt';
  if not LoadStringFromFileInCP(FileName, S, CP_UTF8) then
  begin
    Log('Error loading the file');
  end
    else
  if StringChangeEx(S, 'žluťoučký kůň', 'ďábelské ódy', True) <= 0 then
  begin
    Log('No value was replaced');
  end
    else
  if not SaveStringToFileInCP(FileName, S, CP_UTF8) then
  begin
    Log('Error writing the file');
  end
    else
  begin
    Log('Replacement successful');
  end;
end;

LoadStringFromFileInCP和SaveStringToFileInCP：从何而来
转换阵列字符串为Unicode和回ANSI - Inno Setup的

该代码需要Inno Setup的Unicode版本（Inno Setup 6唯一的版本）。
对于Unicode字符串文字，您的.iss文件必须采用带有BOM的UTF-8编码。