public function edit() {
            $ftype     = I('ftype', 0, 'intval');
            $fname     = I('fname', '', 'trim,htmlspecialchars');
            $file_path = !$ftype ? './Public/Home/' . C('CFG_THEMESTYLE') . '/' : './Public/Mobile/' . C('CFG_MOBILE_THEMESTYLE') . '/';
            if (IS_POST) {
                  if (empty($fname)) {
                        $this->error('未指定文件名');
                  }
                  $_ext     = '.' . pathinfo($fname, PATHINFO_EXTENSION);
                  $_cfg_ext = C('TMPL_TEMPLATE_SUFFIX');
                  if ($_ext != $_cfg_ext) {
                        $this->error('文件后缀必须为"' . $_cfg_ext . '"');
                  }
                  $content  = I('content', '', '');
                  $fname    = ltrim($fname, './');
                  $truefile = $file_path . $fname;
                  if (false !== file_put_contents($truefile, $content)) {
                        $this->success('保存成功', U('index', array('ftype' => $ftype)));
                  } else {
                        $this->error('保存文件失败，请重试');
                  }
                  exit();
            }
            $fname = base64_decode($fname);
            if (empty($fname)) {
                  $this->error('未指定要编辑的文件');
            }
            $truefile = $file_path . $fname;
            if (!file_exists($truefile)) {
                  $this->error('文件不存在');
            }
            $content = file_get_contents($truefile);
            if ($content === false) {
                  $this->error('读取文件失败');
            }
            $content = htmlspecialchars($content);
            $this->assign('ftype', $ftype);
            $this->assign('fname', $fname);
            $this->assign('content', $content);
            $this->assign('type', '修改模板');
            $this->display();      }