uni.showModal,uni.showToast等弹窗都无效,h5项目

goxianshi() {  
    console.log("结束盘点");  
    let that = this;  
    uni.showModal({  
        title: '是否结算盘点',  
        content: '结算盘点可以查看盘盈盘亏商品数量',  
        success: function (res) {  
            console.log("res",res);  
            if (res.confirm) {  
                that.showname = '已盘完'  
                that.xianshi = false  
                that.isbtn=false  
                that.shangList=[]  
                that.dialTables("盘存表")  
            } else if (res.cancel) {}  
        },  
        fail(err) {  
                   console.log("err",err);  
            }  
        })   
},

例如这个,在goxianshi事件中直接调用uni.showModal,没有一点反应