微信小程序中修改数据包括页面数据和数组数据的代码实现方法

let pages = getCurrentPages();//当前页面

   let prevPage = pages[pages.length - 2];//上一页面

   prevPage.setData({//直接给上移页面赋值

     selAddress: true

   });

数组部分：

comdata[

{xhid:8,title:啦啦啦,read_num:100,share_num:20},

{xhid:9,title:嘻嘻嘻,read_num:24,share_num:4},

{xhid:20,title:嘻嘻嘻2,read_num:11,share_num:4},

{xhid:27,title:嗯嗯嗯12,read_num   :8,share_num:4},

{xhid:23,title:阿萨飒飒2,read_num:41,share_num:7}

]

代码如下：

var index=0;

var up = "comdata[" + index + "].share_num";

          var newp = ++that.data[0].share_num;

        that.setData({

            [up]:newp

})

A页面传给B页面share_num和当前的index

在B页面onload赋给

 that.setData({

      item_index:options.index,

      share_num:options.share_num

    })

然后修改代码：

 let pages = getCurrentPages();//当前页面

          let prevPage = pages[pages.length - 2];//上一页面

          var index = that.data.item_index;

          var up = "comdata[" + index + "].share_num";

          var newp = ++that.data.share_num;

          prevPage.setData({//直接给上移页面赋值

            [up]: newp

          });