The applet selects the delivery address navigateBack to jump back to the previous page to pass parameters and update the data

Not much to say, go directly to the code, there are comments in the code

  // 点击地址选中地址返回上一个页面
  seleect_site(e){
    console.log(e)
    let item=encodeURIComponent(JSON.stringify(e.currentTarget.dataset.item))
    var pages = getCurrentPages();
    var prevPage = pages[pages.length - 2]; //上一个页面
    // 调用上一个页面对象的setData()方法，把数据存到上一个页面中去
    prevPage.setData({
    item:item
    });
    // 返回上一个页面
    wx.navigateBack({
    delta: -1
    
    });

  },

Then in the code of the previous page

  onShow: function (options) {
    console.log(JSON.parse(decodeURIComponent(this.data.item)))
    let item=JSON.parse(decodeURIComponent(this.data.item))
    wx.setStorageSync('site',JSON.parse(decodeURIComponent(this.data.item)) )
    this.setData({
      item:item
    })
  },

It needs to be in onShow, because it needs to be updated in real time, so it needs to monitor the page display