el-dialog对话框子组件的关闭方法

<el-dialog :title="title" :visible.sync="dialogVisible" width="30%" :before-close="close">
  <div style="display: flex;justify-content:space-around ;flex: 1;">
    <el-button @click="close">取 消</el-button>
    <el-button type="primary" >确 定</el-button>
  </div>
</el-dialog>

methods: {
        close() {
            this.$emit("close")
        },
    }

<clue-assign-dialog 
  ref="clueAssign" 
  :dialog-visible="dialogVisible" 
  :title="title" 
  @close="dialogVisible = false">
</clue-assign-dialog>

<template>
  <div>
    <el-dialog
      title="表单"
      :visible="dialogVisible"
      width="45%"
      @close="handleClose"
    >
      <span>子组件弹出框</span>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">关 闭</el-button>
        <el-button type="primary" @click="dialogVisible = false"
          >发起合同审批</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>
​
<script>
export default {
  name: 'DialogForm',
  props: {
    DialogFlag: {
      default: false
    }
  },
  data () {
    return {
      // 开关
      dialogVisible: false,
    }
  },
  watch: {
    DialogFlag () {
      this.dialogVisible = this.DialogFlag
    }
  },
  created () {
    console.log('审批页面执行')
  },
  methods: {
    // 表单关闭事件-通知父组件关闭（.syanc）
    // 不通知父组件可能会报错，导致只能打开一次
    handleClose () {
      this.$emit('update:DialogFlag', false)
    },
  }
}
</script>

// 引入组件
import DialogForm from './components/DialogForm.vue'
​
//注册组件
 components: {
    DialogForm
  },
//data
 DialogFlag: false
​
// html
<DialogForm :DialogFlag.sync="DialogFlag" />
​
// 使用组件
  <el-button
              type="primary"
              icon="el-icon-circle-plus-outline"
              @click="examinadd"
              >打开表单</el-button
            >
 examinadd () {
      this.DialogFlag = true
    },