下面是我使用renderAppender 道具，灵感来自韦尔彻的上述评论this post over on Stack.

<InnerBlocks
  renderAppender={() => {
    const blocks = select(\'core/editor\').getBlocks();
    const block = find(blocks, [\'name\', \'NAME_OF_YOUR_BLOCK\']);
    // don\'t return appender if there\'s one or more blocks:
    if (block && block.innerBlocks.length > 0) return null;
    // otherwise, return default appender
    return (<InnerBlocks.DefaultBlockAppender />);
  }}
/>

此外，请确保导入select 作用E、 g。

import { select } from \'@wordpress/data\';