vue2.0中goods选购栏滚动算法的实现代码编程

不多说，直接代码，以便以后重复利用：

<script type="text/ecmascript-6"> import BScroll from 'better-scroll'; const ERR_OK=0; export default { props: { sell: { type: Object } }, data() { return { goods: [], listHeight: [], scrollY: 0 }; }, computed: { currentIndex() { for (let i=0; i < this.listHeight.length; i++) { let height1=this.listHeight[i]; let height2=this.listHeight[i + 1]; if (!height2 || (this.scrollY >=height1 && this.scrollY < height2)) { return i; }; } return 0; } }, created() { this.classMap=['decrease', 'discount', 'special', 'invoice', 'guarantee']; this.$http.get('/api/goods').then((response)=> { response=response.body; if (response.errno===ERR_OK) { this.goods=response.data; this.$nextTick(()=> { this._initScroll(); this._calculateHeight(); }); } }); }, methods: { _initScroll() { this.menuScroll=new BScroll(this.$refs.menuwrapper, { click: true }); this.foodScroll=new BScroll(this.$refs.foodswrapper, { probeType: 3 }); this.foodScroll.on('scroll', (pos)=> { this.scrollY=Math.abs(Math.round(pos.y)); }); }, _calculateHeight() { let foodList=this.$refs.foodswrapper.getElementsByClassName('food-list-hook'); let height=0; this.listHeight.push(height); for (let i=0; i < foodList.length; i++) { let item=foodList[i]; height +=item.clientHeight; this.listHeight.push(height); } }, selectMenu(index, event) { if (!event._constructed) { return; }; console.log(index); let foodList=this.$refs.foodswrapper.getElementsByClassName('food-list-hook'); let el=foodList[index]; this.foodScroll.scrollToElement(el, 300); } } }; </script>