vue父子传值修改值时报错 Avoid mutating a prop directly since the value will be overwritten whenever the parent

首先 代码按正常的组件传值写的 后来一直报错
Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop’s value. Prop being mutated: “showdialog”
说是不能在子组件里修改父组件的值，可是找了好久，没有发现有父组件的值是在子组件里被修改的，于是换个方法，改用ref

父组件

<editDialog
  ref="editdialog"
  :sectionid="sectionId"
  @isReload="isReload"
/>


// 点击触发
edit() {
    
    
  this.$refs.editdialog.showdialog = true
},

子组件

<el-dialog title="编辑" :visible.sync="showdialog" width="30%">
	<el-button @click="cancel">取 消</el-button>
</el-dialog>


data() {
    
    
  return {
    
    
    showdialog: false,
  }
},

cancel() {
    
    
 this.showdialog = false
},

以上就可以啦