效果图

.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});}},

总结　

　　以上所述是小编给大家介绍的微信小程序导航栏跟随滑动效果的实现代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！