checkbox如何全选？??

<view class="student-ed">
<view class="un-student-head">
<text>学生名单：</text>
<radio-group class="radio-group" @change="radioChange" >
<label class="check-stu-h" key="all">
<radio value="all" :checked="radioSelectAll" />
<view>全选</view>
</label>
<label class="check-stu" key="none" >
<radio value="none" :checked="radioSelectNo"/>
<view>取消</view>
</label>
</radio-group>

            </view>  
            <checkbox-group class="student-lists" @change="stuChange">  
                <label class="check-stu" v-for="(item,index) in stuList" :key="index">  
                    <!-- <radio  :value="item.id"  :checked="item.checked" /> -->  
                    <checkbox :value="item.id" :checked="item.checked" />  
                    <view>{{item.name}}</view>  
                </label>  
            </checkbox-group>  
        </view>  

//全部选择学生时
radioChange: function (e) {
let v = e.target.value;
if(v == 'all'){
this.stuList.forEach(item =>{

                    item.checked = true;  
                });  

            }else{  
                this.stuList.forEach(item =>{  
                    item.checked = false;  
                });  
            }  
            console.log(JSON.stringify(this.stuList));  
        },