APP端v-for无法重新渲染，小程序一切正常

   <view class="attr-details" v-show="goods.attr.length&&isprove">  
                            <view class="detai_title">已选</view>  
                            <view v-for="(items,rela_key) in goods.attrrelationitem" :key="rela_key">  
                                <view class="detai_yet" v-show="items.num > 0||items.num===''">{{items.attr_value_name}},{{items.num}}件  

                                    <view class="flex-row number-input-box detai_input" style="height: 65upx;">  
                                        <view @click="redSub(items,rela_key)" class="flex-grow-0 flex-x-center flex-y-center number-btn number-sub"  
                                         :class="{'disabled':items.num === 0}">-</view>  
                                        <view class="flex-grow-0">  
                                            <input class="flex-grow-1 number-input" min="1" step="1" type="number" :value="items.num"  
                                             @focus="isattrkey(rela_key)" @blur="loseattrkey(rela_key)"></input>  
                                        </view>  
                                        <view @click="addSub(items,rela_key)" class="flex-grow-0 flex-x-center flex-y-center number-btn number-add">+</view>  
                                    </view>  
                                </view>  
                            </view>  
                        </view>