微信小程序實現頂部選項卡(swiper)

<!--pages/index/index.wxml--> 
<view class="swiper-tab"> 
 <view class="tab-item {{currentTab==0 ? 'on' : ''}}" data-current="0" bindtap="swichNav">選項一</view> 
 <view class="tab-item {{currentTab==1 ? 'on' : ''}}" data-current="1" bindtap="swichNav">選項二</view> 
 <view class="tab-item {{currentTab==2 ? 'on' : ''}}" data-current="2" bindtap="swichNav">選項三</view> 
</view> 
 
<swiper current="{{currentTab}}" class="swiper" duration="300" style="height:{{winHeight - 30}}px" bindchange="bindChange"> 
 <swiper-item> 
 <view>頁面一</view> 
 </swiper-item> 
 <swiper-item> 
 <view>頁面二</view> 
 </swiper-item> 
 <swiper-item> 
 <view>頁面三</view> 
 </swiper-item> 
</swiper> 

/* pages/index/index.wxss */ 
.swiper-tab{ 
 width: 100%; 
 text-align: center; 
 line-height: 80rpx; 
 border-bottom: 1px solid #000; 
 display: flex; 
 flex-direction: row; 
 justify-content: center; 
} 
.tab-item{ 
 flex: 1; 
 font-size: 30rpx; 
 display: inline-block; 
 color: #777777; 
} 
.on{ 
 color: red; 
 border-bottom: 5rpx solid red; 
} 
.swiper{ display: block; height: 100%; width: 100%; overflow: hidden; } 
.swiper view{ 
 text-align: center; 
 padding-top: 100rpx; 
} 

// pages/index/index.js 
Page({ 
 
 /** 
 * 頁面的初始數據 
 */ 
 data: { 
 winWidth:0, 
 winHeight:0, 
 currentTab:0 
 }, 
 
 /** 
 * 生命周期函數--監聽頁面加載 
 */ 
 onLoad: function (options) { 
 var that = this; 
 
 /** 
 * 獲取系統信息 
 */ 
 wx.getSystemInfo({ 
 
 success: function (res) { 
 that.setData({ 
 winWidth: res.windowWidth, 
 winHeight: res.windowHeight 
 }); 
 } 
 
 }); 
 }, 
 bindChange: function (e) { 
 
 var that = this; 
 that.setData({ currentTab: e.detail.current }); 
 
 }, 
 swichNav: function (e) { 
 
 var that = this; 
 
 if (this.data.currentTab === e.target.dataset.current) { 
 return false; 
 } else { 
 that.setData({ 
 currentTab: e.target.dataset.current 
 }) 
 } 
 } , 
 /** 
 * 頁面相關事件處理函數--監聽用戶下拉動作 
 */ 
 onPullDownRefresh: function () { 
 
 }, 
 
 /** 
 * 頁面上拉觸底事件的處理函數 
 */ 
 onReachBottom: function () { 
 
 }, 
 
 /** 
 * 用戶點擊右上角分享 
 */ 
 onShareAppMessage: function () { 
 
 } 
})