<button open-type="share" plain class="item share" @click.stop="shareFn(item)"><text>分享</text>
</button>

	import {onShareAppMessage} from '@dcloudio/uni-app'let shareObj = ref({})// 将点击后的分享设置信息  关键就是这个promise  resolve的结果就是分享的数据信息onShareAppMessage(() => {const promise = new Promise(resolve => {setTimeout(() => {resolve({title: '分享信息-'+shareObj.value.desc,desc: shareObj.value.desc,path: shareObj.value.path})}, 100)})return {promise}})
// 点击 设置分享信息  let shareFn = (item) => {console.log(item, 'item');shareObj.value.desc = item.lifeshareContentshareObj.value.path = '/pages/comment-detail/comment-detail?lifeshareId=' + item.lifeshareId}

这个是官网的信息
https://developers.weixin.qq.com/miniprogram/dev/platform-capabilities/miniapp/component/onShareAppMessage.html

结果