Vue中父子组件如何实现传值

//父组件
<device-dialog
      :personInfo="info" //父组件通过赋值给info将表单数据传给子组件
      :action="action" //判断是新增还是编辑 add、edit
      :dialogText="dialogText" //对话框显示的标题
      @toClose="dialogConfirm('cancel')" //关闭按钮对应的函数
      @toComfirm="requestApi('getUser')" //确定按钮对应的函数
      v-if="this.dialogFormNew" //控制对话框的显示与隐藏
></device-dialog>

this.info = this.form_user; //父组件中相关的值赋值给info
this.dialogText = '编辑设备信息';
this.dialogFormNew = true;

<script>
export default {
  name: 'personDetail',
  props: {
    personInfo: {
      type: Object,
      default: {}
    },
    action: {
      type: String,
      default: {}
    },
    dialogText: {
      type: String,
      default: {}
    }
  }
}
</script>

created() {
    this.form_user = this.personInfo; //form_user是子组件对话框显示表单数据的数组
  }

   </template>
    </div>
     <el-dialog>
      <div
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="dialogConfirm('cancel')">取 消</el-button>
        <el-button
          type="primary"
          @click="dialogConfirm('confirm')"
        >
          确 定
        </el-button>
      </div>
    </el-dialog>
   </div>
  </template>
  
<script>
dialogConfirm(res) {
if (this.action === 'edit') {
        if (res === 'cancel') {
          this.closeDialog();
        } else {
          this.$refs['userForm'].validate((valid) => {
            //验证成功
            if (valid) {
              this.requestApi('edit'); //进入api新增请求
            } else {
              //验证失败
              console.log('error submit!!');
              return false;
            }
          });
        }
      }
},
closeDialog() {
      this.$emit('toClose', false); //通过$emit将参数false传值给父组件toClose对应的函数
    },
requestApi(action, verifyCB) {
      switch (action) {
        // 查看编辑
        case 'edit':
        this.$axios({
            method: 'post',
            url: '/office/roomDevice/updateLock?random=' + Math.random() * 10,
            data: {
              id: this.form_user.deviceId,
              deviceName: this.form_user.deviceName,
              deviceAddress: this.form_user.deviceAddress
            },
            headers: {
              Authorization: 'Bearer ' + sessionStorage.getItem('token')
            }
          })
            .then((res) => {
              console.log('编辑_res:', res);
              if (res.data.code === 0) {
                this.tips(res.data.message, 'success');
                this.comfirm();
              } else {
                this.tips(res.data.message, 'warning');
              }
            })
            .catch((error) => {
              console.error(error);
            });
          break;
     },
     comfirm() {
      this.$emit('toComfirm'); //这里将相关的数据传回父组件
    }
</script>