vue数据push后不能响应式更新的问题

	if (res.data.length > 0) {
							// var goodesMap = new Map()
							var temp_goodsList = []
 
							var trandeProductList = res.data
							navItem.orderList.push({
								goodsList: []
							})
							for (var i = 0; i < navItem.orderList.length; i++) {
								for (var j = 0; j < trandeProductList.length; j++) {
									if (navItem.orderList[i].tradeNo == trandeProductList[j].trandeForm
										.tradeNo) {
										temp_goodsList.push(trandeProductList[j])
									}
								}
								navItem.orderList[i]["goodsList"] = temp_goodsList
 
								// Object.assign(navItem.orderList[i], goodesMap.get("goodsList"));
								// navItem.orderList[i].push(goodsList)
								temp_goodsList = []
								// goodesMap.clear()
							}
 
							// var s = that.navList[0].orderList[0].goodsList.length
							// for (var i = 0; i < navItem.orderList.length; i++)
							// {
							// 	for (var j = 0; j < navItem.orderList[i].goodsList.length; j++) {
							// 		console.log(navItem.orderList[i].goodsList[j].product.name)
							// 	}
 
							// }
						}

data: {
    // 1.基础数据类型，字符串   :this.xxx 直接修改数据
    title:"vue",
    // 2.数组类型   :使用7个变异函数修改
    ingredients: ['meat', 'fruit', 'cookies'],
    // 2-2：数组内容为对象   
    // ①:如果是更改对象里的某一元素则   this.persons[1].xxx
    // ②:如果是修改整个对象内容 也是使用7个变异函数修改
    persons: [
       { name: 'Vane', age: 38, color: 'red' },
       { name: 'Fang', age: 27, color: 'blue' },
    ],
    // 3.对象类型
    // ①:如果修改原有响应式数据，则 userInfo.xxx修改
    // ②:如果是新增响应式数据，则 this.$set(this.userInfo,'xxx','x')
    userInfo:{
         name:"wangwu",
         age:19
    }
},

this.ingredients[1]="soup" // 失败

this.ingredients.splice(1,1,"soup") // 成功

this.persons[1].name="lisi"

this.persons.splice(1,1,{name: 'zhangsan', age: 20, color: 'green'})

this.persons[1]={ name: 'zhangsan', age: 20, color: 'green' }