效果图如下：
（1）左侧导航联动右侧内容
实现：点击左侧导航，右侧内容滑到对应的位置，并且导航上有current当前样式。
mpvue用的还是微信小程序提供的组件scroll-view，它里面有一个属性scroll-into-view，值为某子元素的id，滚动到该元素。
template:
<scroll-view scroll-y> <ul> <li v-for="(item,index) in goods" :class="index===currentIndex ? 'current' : ''" :key="index" @tap="selectMenu(index)"> {{item.name}} </li> </ul> </scroll-view> <scroll-view scroll-y :scroll-into-view="contentId" scroll-with-animation="true"> <ul> <li v-for="(item,i) in goods" :id="'con_'+i" :key="i"> </li> </ul> <scroll-view>
js:
data() { return { goods: [], contentId: '', // 每个food-list的id，scroll-into-view滚动到对应的id currentIndex: 0 } }, methods: { selectMenu(index) { this.contentId = `con_${index}` this.currentIndex = index } }
（2）在左侧导航联动右侧内容的基础上增加右侧内容联动左侧导航
实现：滑动右侧内容区域，给左侧对应导航增加current样式，并且当导航高度过长，会联动其滚动
补充：contentHeight是右侧内容scroll-view的高度，同时也是左侧导航scroll-view的高度，navItemHeight是导航ul下每一个item的高度，当导航下ul的高度超过scroll-view的高度，并且this.currentIndex * this.navItemHeight > this.contentHeight，导航才向上滚动。
tempate:
<scroll-view :scroll-into-view="navId" scroll-with-animation="true" scroll-y> <ul> <li v-for="(item,index) in goods" :id="'nav_'+index" :class="index===currentIndex ? 'current' : ''" :key="index" @tap="selectMenu(index)"> {{item.name}} </li> </ul> </scroll-view> <scroll-view scroll-y @scroll="onScroll" :scroll-into-view="contentId" scroll-with-animation="true"> <ul> <li v-for="(item,i) in goods" :id="'con_'+i" :key="i"> </li> </ul> </scroll-view>
js:
export default{ data() { return { goods: [], contentId: '', // 每个food-list的id，scroll-into-view滚动到对应的id navId: '', // 导航模块对应的id，用来联动内容区域 currentIndex: 0, navulHeight: 0, // 导航里ul高度 navItemHeight: 0, // 每个导航高度 listHeight: [], // foods内部块的高度 contentHeight: [], // 内容区域scroll-view高度 } }, watch: { currentIndex() { console.log(this.currentIndex) if (this.contentHeight < this.navulHeight) { let h = this.currentIndex * this.navItemHeight if (h > this.contentHeight) { // 导航滑动 this.navId = `nav_${this.currentIndex}` } else { this.navId = 'nav_0' } } } }, methods: { selectMenu(index) { this.contentId = `con_${index}` this.navId = `nav_${index}` this.currentIndex = index }, onScroll(e) { this.contentId = '' let scrollTop = e.target.scrollTop // console.log(scrollTop) let length = this.listHeight.length if (scrollTop >= this.listHeight[length - 1] - this.contentHeight) { return } else if (scrollTop > 0 && scrollTop < this.listHeight[0]) { this.currentIndex = 0 } for (let i = 0; i < length; i++) { if (scrollTop >= this.listHeight[i - 1] && scrollTop < this.listHeight[i]) { this.currentIndex = i } } // console.log(this.currentIndex) }, getFoodHeight() { var query = wx.createSelectorQuery() let h = 0 query.selectAll('.food-list-hook').boundingClientRect((rects) => { // console.log(rects) rects.forEach((rect) => { h += rect.height this.listHeight.push(h) }) // console.log(this.listHeight) }) query.select('.foods-wrapper').boundingClientRect((rect) => { this.contentHeight = rect.height }) query.select('.menu-ul').boundingClientRect((rect) => { this.navulHeight = rect.height }) query.select('.menu-item').boundingClientRect((rect) => { this.navItemHeight = rect.height }).exec() } }， watch: { goods() { // 获取模块高度，即food-list setTimeout(() => { this.getFoodHeight() }, 60) } } }