如何向对象里面添加元素，本例是向数组对象中加如元素，方法是一样的。

该数组格式如下，数组里面是对象，对象里面有数组，看起来复杂，实际上并不难。

waitPayShow: [
   {
     orderid: 0,
     goods:[{
       goodid: 0,
       price: 10,
       number: 2
     },{
       goodid: 1,
       price: 10,
       number: 2
     }]
   },
   {
     orderid: 2,
     [{
       goodid: 2,
       price: 10,
       number: 2
     },{
       goodid: 3,
       price: 10,
       number: 2
     }]
    }
  ]

 /**
   * 显示待付款页面
   */
  waitPayShow: function () {
    //创建数组
    let array = []
    for (let i = 0; i < this.data.waitPayOrder.length; i++) {
      let sumPrice = 0
      let sumNumber = 0
      for (let j = 0; j < this.data.waitPayOrder[i].goods.length; j++) {
        let goodsPrice = parseFloat(this.data.waitPayOrder[i].goods[j].price)
        let goodsNumber = parseFloat(this.data.waitPayOrder[i].goods[j].number)
        sumPrice += goodsPrice * goodsNumber
        sumNumber += goodsNumber
      }
      //将计算好的内容加到数组对象中
      array.push(
        Object.assign({}, this.data.waitPayOrder[i], { totalNumber: sumNumber, totalPrice: sumPrice })
      )
    }
    this.setData({
      waitPayOrder: array
    })
  },

如果有大佬发现哪里不妥欢迎指正。qq:1534147975.