js端代码如下：

Page({
  data: {
    week: [
      {name:'星期一',mix:'03-08'},
      {name:'星期二',mix:'03-08'},
      {name:'星期三',mix:'03-08'},
      {name:'星期四',mix:'03-08'},
      {name:'星期五',mix:'03-08'},
      {name:'星期六',mix:'03-08'},
      {name:'星期日',mix:'03-08'}
    ]
  },
  sub(){
  //  this.week.push({name:'a',mix:'b'})//错误的写法
   this.data.week.push({name:'a',mix:'b'})
    console.log(this.data.week)
  }
 
})

wxml端代码如下：

<view  wx:for="{{week}}" wx:key="index">
   <view>{{item.name}}</view>
</view>

<button bind:tap="sub">提交</button>