study_wxapp/pages/post/post.js

const app = getApp()
Page({

  data: {
    postId:0,
    info:{},
    content:''
  },
  onLoad: function (options) {
    let postId = +options.postId||7356;
    this.setData({postId})
  },
  onShow: function(){
    this.loadData()
  },
  loadData(){
    let postId = this.data.postId
    app.formPost( "Post.getPostInfo", {postId}).then( res=>{
      if( res.code == 200 ){
        let info = res.data
        this.setData({info})
      }
    })
  },
  onShareAppMessage: function () {
    let {postId, title} = this.data.info;
    return {
      title: title,
      path: `/pages/post/post?postId=${postId}`
    }
  }
})