请问vue怎样实现输入框里原有默认值，可在原有的基础上修改，其他不需要修改的可以保留默认值

Question

<template>
  <div id="layout-inner">
      <a-breadcrumb style="margin:0;margin-top:10px;margin-left:16px;text-align: left">
              <a-breadcrumb-item>个人中心</a-breadcrumb-item>
              <a-breadcrumb-item>查看个人信息</a-breadcrumb-item>

      </a-breadcrumb>

      <a-layout-content
              :style="{ margin: '13px 16px', padding: '24px', background: '#fff', minHeight: '520px' }"
      >
      <div id="content">
        <div id="personalInfo">
            <span class="InfoTitle">
              个人信息
            </span>

            <button class="changeInfo">修改信息</button>
            <button class="changePassword" @click="showModal">修改密码</button>

          <a-modal v-model="visible" title="修改密码">


              <a-form-model ref="changePasswordForm" :model="changePasswordForm.form" :rules="changePasswordForm.rules">
                <a-form-model-item  label="新密码" prop="newPassword">
                  <a-input v-model="changePasswordForm.form.newPassword" type="password" placeholder="请设置字符串长度为6~8位的密码"/>
                </a-form-model-item>
                <a-form-model-item  label="确认密码" prop="confirmPassword">
                  <a-input v-model="changePasswordForm.form.confirmPassword" type="password" />
                </a-form-model-item>


              </a-form-model>


            <template slot="footer">

              <a-button  @click="resetForm('changePasswordForm')">重置</a-button>

              <a-button type="primary" @click="changePassword(changePasswordForm.form.newPassword)">提交</a-button>
            </template>
          </a-modal>





          <div id="personalInfoContent">
            <div id="formPart">
              <a-form-model  ref="infoForm"
                             :model="infoForm.form"
                             :rules="infoForm.rules"
                             :style="{marginTop:'10px'}"
                             :label-col="layout.labelCol"
                             :wrapper-col="layout.wrapperCol"
              >
                <a-form-model-item label="姓名" ref="userName" prop="userName" class="formItem">

                  <a-input v-model="infoForm.form.userName" type="text" default-value="0571">
                  </a-input>
                </a-form-model-item>


                <a-form-model-item label="手机号码" ref="userPhone" prop="userPhone" class="formItem">
                  <a-input v-model="infoForm.form.userPhone" type="text">

                  </a-input>
                </a-form-model-item>

                <a-form-model-item label="用户角色" ref="userRole" prop="userRole" class="formItem">
                  <a-input v-model="infoForm.form.userRole" disabled>

                  </a-input>
                </a-form-model-item>

                <a-form-model-item label="学号" ref="userId" prop="userId" class="formItem">
                  <a-input v-model="infoForm.form.userId"  type="text" >
                  </a-input>
                </a-form-model-item>


                <a-form-model-item label="邮箱" ref="userEmail" prop="userEmail" class="formItem">
                  <a-input v-model="infoForm.form.userEmail"  type="text" >
                  </a-input>
                </a-form-model-item>



                <a-form-model-item label="性别" ref="userSex" prop="userSex" class="formItem">
                  <a-select v-model="infoForm.form.userSex"  :style="{minWidth:'100px'}">
                    <a-select-option value="0">
                      男
                    </a-select-option>
                    <a-select-option value="1">
                      女
                    </a-select-option>
                  </a-select>
                </a-form-model-item>




                <a-form-model-item label="学院" rf="academy" prop="academy" class="formItem">
                  <a-input v-model="infoForm.form.academy"  type="text">
                  </a-input>
                </a-form-model-item>

                <a-form-model-item label="专业" ref="profession" prop="profession" class="formItem">
                  <a-input v-model="infoForm.form.profession"  type="text" >
                  </a-input>
                </a-form-model-item>


                <a-form-model-item label="班级" ref="userClass" prop="userClass" class="formItem">
                  <a-input v-model="infoForm.form.userClass" type="text">
                  </a-input>
                </a-form-model-item>

                <a-form-model-item label="岗位" ref="post" prop="post" class="formItem">
                  <a-select v-model="infoForm.form.post"  :style="{minWidth:'100px'}">
                    <a-select-option value="0">
                      前端
                    </a-select-option>
                    <a-select-option value="1">
                      后端
                    </a-select-option>
                    <a-select-option value="2">
                      其他
                    </a-select-option>

                  </a-select>
                </a-form-model-item>





              </a-form-model>
            </div>

            <div id="avatarPart">
                            <a-form-model-item label="头像" :style="{display:'flex'}">
                              <a-upload
                                  name="file"
                                  list-type="picture-card"
                                  :show-upload-list="false"
                                  class="avatar-uploader"
                                  action="/apis/user/upload"
                                  :before-upload="beforeUpload"
                                  @change="handleChange"

                              >
                                <img v-if="imageUrl" :src="imageUrl" alt="avatar" />
                                <div v-else>
                                  <a-icon :type="loading ? 'loading' : 'plus'" />
                                  <div class="ant-upload-text">
                                    上传
                                  </div>
                                </div>
                              </a-upload>
                            </a-form-model-item>
            </div>

          </div>


          <a-form-model-item :wrapperCol="itemWrapper" :style="{textAlign:'center'}">
            <a-button
                :style="{borderColor:'#79A0F1',color:'#79A0F1',marginRight:'30px'}"
                type="submit"
                @click="changeInfo">
              保存
            </a-button>

            <a-button
                :style="{borderColor:'#79A0F1',color:'#79A0F1',marginRight:'30px'}"
                @click="resetForm('infoForm') ">
              重置
            </a-button>
          </a-form-model-item>





        </div>



      </div>
      </a-layout-content>


  </div>
</template>

<script>

import {validMobile} from "@/utils/validate";
import {validEmail} from "@/utils/validate";

function getBase64(img, callback) {
  const reader = new FileReader();
  reader.addEventListener('load', () => callback(reader.result));
  reader.readAsDataURL(img);
}


export default {
  data(){
    const validateMobile = (rule, value, callback) => {
      if (!value) {
        return callback(new Error('请输入手机号码'))
      }
      if (!validMobile(value)) {
        return callback(new Error('手机号码格式不正确'))
      }
      callback()
    }

    const validateEmail = (rule, value, callback) => {
      if (!value) {
        return callback(new Error('请输入邮箱'))
      }
      if (!validEmail(value)) {
        return callback(new Error('邮箱格式不正确'))
      }
      callback()
    }



    const validateConfirmPassword= (rule, value, callback) => {
      if (value === '') {
        return callback(new Error('请再次输入密码'));
      } else if (value !== this.changePasswordForm.form.newPassword) {
        return callback(new Error("前后密码输入不一致"));
      } else {
        callback();
      }
    };




    return {
      visible:false,

      changePasswordForm:{
        form:{
          newPassword:'',
          confirmPassword:'',

        },
        rules:{
          newPassword:[{ required: true, message: "请输入密码", trigger: "blur" },
                        { min: 6, max: 8, message: '密码格式不正确', trigger: 'blur' },],

          confirmPassword: [{ required: true, message: "请再次输入密码", trigger: "blur" },
              {validator: validateConfirmPassword, trigger: 'blur'}]
        },

      },

      infoForm: {
        form:{

          userName: '',
          userPhone: '',
          userRole: '普通用户',
          userEmail: '',
          userId: '',
          userSex: undefined,
          profession: '',
          userClass: '',
          academy: '',
          post: undefined,

        },

        rules: {
          userName: [{ required: true, message: "请输入姓名", trigger: "blur" }],

          userPhone: [
            {
              required: true,
              trigger: "blur",
              validator:validateMobile
            },

          ],
          userId: [{ required: true, message: "请输入学号", trigger: "blur" }],
          userEmail: [
            {
              required: true,
              trigger: "blur",
              validator:validateEmail
            },

          ],

          userSex: [{ required: true, message: "请选择性别",  trigger: 'change'}],
          profession: [{ required: true, message: "请输入专业", trigger: "blur" }],
          userClass: [{ required: true, message: "请输入班级", trigger: "blur" }],
          academy: [{ required: true, message: "请输入学院", trigger: "blur" }],
          post: [{ required: true, message: "请选择岗位",  trigger: 'change'}],

        },
      },




      layout: {
        labelCol: { span: 3 },
        wrapperCol: { span: 6},
      },
      itemWrapper: { span: 24 },
      // 文件上传
      loading: false,
      imageUrl: ''



    };
  },
  mounted() {
    // console.log('接收到的路由参数', this.$route.params.data)
    console.log('接收到的路由参数', this.$route.query.data)
  },

  methods:{
    beforeUpload(file) {
      const isLt2M = file.size / 1024 / 1024 < 1;
      if (!isLt2M) {
        this.$message.error('图片大小应该小于1MB');
      }
      return isLt2M;
    },

    handleChange(info) {
      if (info.file.status !== 'uploading') {
        console.log(info.file, info.fileList);
      }
      if (info.file.status === 'done') {
        // Get this url from response in real world.
        console.log('upload', info)
        this.registerForm.form.fileId = info.file.response.data.fileId
        getBase64(info.file.originFileObj, imageUrl => {
          this.imageUrl = imageUrl;
          this.loading = false;
        });
      }
    },
    showModal() {
      this.visible = true;
    },
    changePassword(newPassword){
      console.log("新密码："+newPassword)
      alert("新密码："+newPassword)
    },
    resetForm(formName) {
      this.$refs[formName].resetFields();

    },
    changeInfo(){
      console.log("要修改个人信息！")
    }









  }
}
</script>

<style scoped>
@import "index.css";
</style>

在应用v-model接用户输入的值后，设置的default-value会失效，根本不会在页面上呈现。希望实现能够在原有的基础上对输入框上的值进行修改，请赐教，感激不尽。