u-view2插件input组件清除功能不生效

<u-form-item  label="零件编码：" borderBottom>  
                        <view class="orderName">  
                            <u-input border="none" focus v-model="informationCode" color="#0e8eeb" placeholder="请输入零件编码"   
                             placeholderStyle="color:#0e8eeb70" clearable @clear="clear"></u-input>  
                        </view>  
                    </u-form-item>

clear(){  
                console.log("qingkong")  
                this.informationCode = ''  
            },