如何在vue.js渲染完界面之后再調用函數

https://blog.csdn.net/qappleh/article/details/88708341?utm_medium=distribute.pc_relevant.none-task-blog-baidujs-5

watch:{
            detailsList:function(){
                this.$nextTick(function() {
                    let query = uni.createSelectorQuery(); //創建節點查詢器
                    query.selectAll('.node').boundingClientRect(data => {
                        data.forEach(function(value) {
                            // 各可視分區滾動條位置=區域位置-74(Tab高度)+24(各區域間隔)
                            _self.scrollTopArray.push(Math.ceil(value.top - (24 + 74) * rpxToPxRate) + 1);
                        })
                        console.log(JSON.stringify(_self.scrollTopArray))
                    }).exec();
                });
            }
        }