在vue中v-model绑定了一个值到val中，用到了计算属性监测val的变化，但是使用了computed之后，v-model的双向绑定失效

<div class = "flex f7" style = "width: 0" v-if="isIos || isAndroid">
    <input class = "f7" type = "text" v-model = "getAddress" :placeholder = "$t('withdraw.adsToast')"/>
          
     <div class = "f1 img-cont" @click = "scan()">
         <img src = "../../assets/img/ic-withdrawAds.png"
                 class = "ic-ads"/>
      </div>
 </div>

computed: {
      getAddress() {
        if(this.$store.state.updateAddress){
          this.address = this.$store.state.updateAddress
        }
        return this.$store.state.updateAddress;
      },
    },

输入地址之后再输入下面其他input值，地址值变为空，打印this.address为空

后来在计算属性中加入get和set解决了双向绑定问题

computed: {
      getAddress: {
        get: function () {
          if(this.$store.state.updateAddress){
            this.address = this.$store.state.updateAddress
          }
          return this.address
        },
        set: function (value) {
          this.address = value
        },
      },
    },