code: function () {
              var me = this, range;
              if (me.body.contentEditable == 'false') {
                  me.body.contentEditable = true;
                  range = me.selection.getRange();
                  //有可能内容丢失了
                  try {
                      range.moveToBookmark(me.lastBk);
                      delete me.lastBk
                  } catch (e) {
                      range.setStartAtFirst(me.body).collapse(true)
                  }
                  range.select(true);
                  if (me.bkqueryCommandState) {
                      me.queryCommandState = me.bkqueryCommandState;
                      delete me.bkqueryCommandState;
                  }
                  if (me.bkqueryCommandValue) {
                      me.queryCommandValue = me.bkqueryCommandValue;
                      delete me.bkqueryCommandValue;
                  }
                  me.fireEvent('selectionchange');
              }
          }
docs: 设置当前编辑区域可以编辑
  @method setEnabled
  @example
  ```javascript
  editor.setEnabled()
  ```