小程序仿滴滴tab切换效果

wxss

/**index.wxss**/ page{ width: 100%; height: 100%; } .container{ width: 100%; height: 100%; } .nav { height: 80rpx; width: 100%; box-sizing: border-box; overflow: hidden; line-height: 80rpx; background: #f7f7f7; font-size: 16px; white-space: nowrap; position: fixed; top: 0; left: 0; z-index: 99; } .nav-item { width: 20%; display: inline-block; text-align: center; } .nav-item.active{ color: red; } .tab-box{ background: greenyellow; padding-top: 80rpx; height: 100%; box-sizing: border-box; } .tab-content{ overflow-y: scroll; }

wxml

<view class="container"> <!-- tab导航栏 --> <!-- scroll-left属性可以控制滚动条位置 --> <!-- scroll-with-animation滚动添加动画过渡 --> <scroll-view scroll-x="true" class="nav" scroll-left="{{navScrollLeft}}" scroll-with-animation="{{true}}"> <block wx:for="{{navData}}" wx:for-index="idx" wx:for-item="navItem" wx:key="idx"> <view class="nav-item {{currentTab == idx ?'active':''}}" data-current="{{idx}}" bindtap="switchNav">{{navItem.text}}</view> </block> </scroll-view> <!-- 页面内容 --> <swiper class="tab-box" current="{{currentTab}}" duration="300" bindchange="switchTab"> <swiper-item wx:for="{{[0]}}" wx:for-item="tabItem" wx:for-index="idx" wx:key="idx" class="tab-content"> 1 </swiper-item> <swiper-item wx:for="{{[1]}}" wx:for-item="tabItem" wx:for-index="idx" wx:key="idx" class="tab-content"> 2 </swiper-item> <swiper-item wx:for="{{[2]}}" wx:for-item="tabItem" wx:for-index="idx" wx:key="idx" class="tab-content"> 3 </swiper-item> </swiper> </view>

js

//index.js //获取应用实例 const app = getApp() Page({ data: { motto: 'Hello World', userInfo: {}, hasUserInfo: false, canIUse: wx.canIUse('button.open-type.getUserInfo'), navData:[ { text: '首页' }, { text: '健康' }, { text: '情感' }, { text: '职场' }, { text: '育儿' }, { text: '纠纷' }, { text: '青葱' }, { text: '上课' }, { text: '下课' } ], currentTab: 0, navScrollLeft: 0 }, //事件处理函数 onLoad: function () { if (app.globalData.userInfo) { this.setData({ userInfo: app.globalData.userInfo, hasUserInfo: true }) } else if (this.data.canIUse) { // 由于 getUserInfo 是网络请求，可能会在 Page.onLoad 之后才返回 // 所以此处加入 callback 以防止这种情况 app.userInfoReadyCallback = res => { this.setData({ userInfo: res.userInfo, hasUserInfo: true }) } } else { // 在没有 open-type=getUserInfo 版本的兼容处理 wx.getUserInfo({ success: res => { app.globalData.userInfo = res.userInfo this.setData({ userInfo: res.userInfo, hasUserInfo: true }) } }) } wx.getSystemInfo({ success: (res) => { this.setData({ pixelRatio: res.pixelRatio, windowHeight: res.windowHeight, windowWidth: res.windowWidth }) }, }) }, switchNav(event){ var cur = event.currentTarget.dataset.current; //每个tab选项宽度占1/5 var singleNavWidth = this.data.windowWidth / 5; //tab选项居中 this.setData({ navScrollLeft: (cur - 2) * singleNavWidth }) if (this.data.currentTab == cur) { return false; } else { this.setData({ currentTab: cur }) } }, switchTab(event){ var cur = event.detail.current; var singleNavWidth = this.data.windowWidth / 5; this.setData({ currentTab: cur, navScrollLeft: (cur - 2) * singleNavWidth }); } })