uniapp中有原输入框绑定的值，输入内容不符合条件会进行自动纠错，在同一不符合条件的区间内视图不更新

Question

最初绑定的是50，输入值等于0的时候失去焦点需要将输入框中的值重置为50
现在效果就是视图不更新，在50之外的区间第一次视图是可以更新到的就像图片中输入78失去焦点会变成150，但是第二次如果输入79，视图还是不会更新到150，显示的还是79，但是数据源的值确实改变成了150

代码

// 输入框绑定的item数据内容
id: 210
mainImage: "https://qqw-b2b.oss-cn-beijing.aliyuncs.com/202184175557d3685a91-c043-4330-8ca2-5fa12602b621.jpg"
price: "200.00"
skuList: [{
cartNum: 50
commodityId: 210
gradient: true
id: 464
minNum: 50
purchaseMultiple: 50
sellableInventory: 999
specification1: ""
specification2: ""
specificationDetail: ""
specificationValue1: ""
specificationValue2: ""
unitId: 1
unitName: "箱"
wholesalePrice: "200.00"
}]
status: 50
title: "海玉食颜大礼包（石头饼原味*2+石头饼孜然*2+蜂巢小脆*2+小馍丁牛肉味*2、麻辣味*2）"
totalSellableInventory: 999

                            <input type="number"
                             @blur="blurOneSku($event,item,i)"
                             :value="item.skuList[0].cartNum"
                             :style="'font-size:' + numFontSize + 'rpx'"
                             @input="onKeyInput"
                             class="goods_item_ipt">

    // 绑定输入框失去焦点事件
    // 单sku商品数量加减器失去焦点
    blurOneSku(event, item, i) {
      console.log(event, '1')
      console.log(item, '2')
      console.log(i, '3')
      // 输入值小于起订数
      if (event.target.value < item.skuList[0].minNum) {
        this.$api.msg('最少采购' + item.skuList[0].minNum + '件')
        // this.$nextTick(()=>{})
        delete this.collectGoodsList[i].skuList[0].cartNum
        this.$set(
          this.collectGoodsList[i].skuList[0],
          'cartNum',
          item.skuList[0].minNum
        )
      } else if (
        event.target.value >= item.skuList[0].minNum &&
        event.target.value <= item.skuList[0].sellableInventory
      ) {
        // 输入值大于最小起订数并且小于等于库存
        // 取余浮层错误提示
        if (
          (event.target.value - item.skuList[0].minNum) %
            item.skuList[0].purchaseMultiple !==
          0
        ) {
          this.$api.msg(
            '加购数需是' + item.skuList[0].purchaseMultiple + '的倍数！'
          )
          const num =
            Math.ceil(event.target.value / item.skuList[0].purchaseMultiple) *
              item.skuList[0].purchaseMultiple +
            item.skuList[0].minNum
          delete this.collectGoodsList[i].skuList[0].cartNum
          this.$set(this.collectGoodsList[i].skuList[0], 'cartNum', num)
        } else {
          delete this.collectGoodsList[i].skuList[0].cartNum
          this.$set(
            this.collectGoodsList[i].skuList[0],
            'cartNum',
            event.target.value
          )
        }
      } else if (event.target.value > item.skuList[0].sellableInventory) {
        // 输入值大于库存数
        // 浮层错误提示
        this.$api.msg('超出可购买数量啦~')
        delete this.collectGoodsList[i].skuList[0].cartNum
        this.$set(
          this.collectGoodsList[i].skuList[0],
          'cartNum',
          Math.floor(
            item.skuList[0].sellableInventory / item.skuList[0].purchaseMultiple
          ) *
            item.skuList[0].purchaseMultiple +
            item.skuList[0].minNum
        )
      }
      console.log(this.collectGoodsList, '}}}}}}')
      const skuId = this.collectGoodsList[i].skuList[0].id
      const cartNum = this.collectGoodsList[i].skuList[0].cartNum
      console.log(cartNum, 'cartNumcartNumcartNumcartNumcartNum')
      this.shoppingCart(skuId, cartNum)
    },

问题困扰了好久用this.$set()也只是能更新视图一次，求大佬解答

Answer 1

$forceUpdate