将多选框数据 按照逗号拼接为字符串

getTagIds(data, type) {if (type == "array") {let array = data.join(",")return array} else {let string = data.split(",");return string}},

        在调用这个方法时需要，另外传一个字符串type,以此来判断需要拆分还是组装

 this.inputForm.tagIds = this.getTagIds(this.inputForm.tagIds, "array")

      将这个数组按照逗号组装为字符串，并保存

         在后端数据传过来回显时，需要将字符串拆分

  this.inputForm.tagIds= this.getTagIds(this.inputForm.tagIds)