响应本机branch.io共享内容问题

Question

我想按以下格式共享我的短网址内容

My Share title

please check below link:

https://link.app.my.app/6pZknA8YNU

-via MyApp

下面是我的代码

let customlink = ((item.url ? item.url : item.url))
  let branchUniversalObject = await branch.createBranchUniversalObject('canonicalIdentifier', {
    locallyIndex: true,
    title: 'News Sharing',
    contentDescription: item.title,
    contentImageUrl: item.media[0].url,

  })

  let shareOptions = { messageHeader: '', messageBody: item.title + "\n" + "please check below link:"  + "\n" + '-via MyApp'  }
  let linkProperties = { feature: 'share', channel: 'MyApp' }
  let controlParams = { $desktop_url: customlink, $ios_url: customlink, $android_url: customlink } 
  let { channel, completed, error } = await branchUniversalObject.showShareSheet(shareOptions, linkProperties, controlParams)

当我运行以上代码时，我得到的消息格式为空

My Share title

please check below link:

-via MyApp

https://link.app.my.app/6pZknA8YNU

任何想法我怎么能得到我期望的格式？