效果圖

.wxml

<view class='tabBar'><view class='tabItem wx:if="{{tabClick===0?"click":""}}"' bindtap='clickTab' data-index='0'>tab1</view><view class='tabItem wx:if="{{tabClick===1?"click":""}}"' bindtap='clickTab' data-index='1'>tab2 </view><view class='tabItem wx:if="{{tabClick===2?"click":""}}"' bindtap='clickTab' data-index='2'>tab3 </view><view class='underline' animation="{{animationData}}" style='left:{{isLeft}}'></view></view>

.wxss

.tabBar{height: 80rpx;background-color:#50B7EA;width: 100%;font-size: 28rpx;color: rgba(255,255,255,0.50);position: fixed;top: 0;left: 0;display: flex;justify-content: center;align-items: center;z-index: 997;}.tabItem{width: 33.333%;display: flex;align-content: center;justify-content: center;position: relative;height: 100%;font-size: 28rpx;}.click{color: white;}.underline{position: absolute;content: '';width: 84rpx;height: 3px;background-color:white;bottom: 0;} 

.js

data:{tabClick: 0,animationData: {}, isLeft: '12%'},swiperTab: function (e) {var that = this;var index = e.detail.currentconsole.log(e.detail.current)var animation = wx.createAnimation({duration: 1000,timingFunction: "ease",})this.animation = animationif (index === 0) {animation.translate(0, 0).step();that.setData({animationData: animation.export()})that.setData({tabClick: e.detail.current});} else if (index === 1) {var w = wx.getSystemInfoSync().windowWidth;w = w * 0.32animation.translate(w, 0).step();that.setData({animationData: animation.export()})that.setData({tabClick: e.detail.current});} else if(index === 2){var w = wx.getSystemInfoSync().windowWidth;w = w * 0.65animation.translate(w, 0).step();that.setData({animationData: animation.export()})that.setData({tabClick: e.detail.current});}}, 

總結　

　　以上所述是小編給大家介紹的微信小程序導航欄跟隨滑動效果的實現代碼，希望對大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會及時回復大家的！