function imgError(imgSrc,index,productData,that,isArray){
    //console.log(index)
    //注释2，添加promise处理异步问题，
    return new  Promise((resolve,reject) => {
        var ImgObj = new Image(); //判断图片是否存在
            ImgObj.src = imgSrc;
            ImgObj.onload = function() {
               // console.log("有效", imgSrc)
            }
            ImgObj.onerror =  function() {
                let imgSrcValue = encodeURIComponent(imgSrc);
                that.$http.get('/api/item/getImageUrl',{params:{url:imgSrcValue}}).then(function(response){

                    if(response.data.code == 200){
                        //注释3，采用set设置值，
                        if(isArray=="Array"){
                            Vue.set(productData,index, response.data.data)
                        }else{
                            Vue.set(productData[index],'thumbnail', response.data.data)
                        }

                    }else if(response.data.code == 500){
                        if(isArray=="Array"){
                            Vue.set(productData,index,"/static/default/img/20220514153821.png")
                        }else{
                            Vue.set(productData[index],'thumbnail', "/static/default/img/20220514153821.png")
                        }



                    }else{
                        Vue.set(productData[index],'thumbnail', "/static/default/img/20220514153821.png")
                        //that.$toast({message: response.data.message,icon: 'warning-o',});
                    }
                    resolve()
                },function(res){
                    Vue.set(productData[index],'thumbnail', "/static/default/img/20220514153821.png")
                    //that.$toast({message: response.data.message,icon: 'warning-o',});
                });

            }
            resolve()

    })
}