About the implementation of the top navigation bar in WeChat mini program

<view class="swiper-tab">  
  <view class="swiper-tab-list {{currentTab==0 ? &#39;on&#39; : &#39;&#39;}}" data-current="0" bindtap="swichNav">11</view>  
  <view class="swiper-tab-list {{currentTab==1 ? &#39;on&#39; : &#39;&#39;}}" data-current="1" bindtap="swichNav">22</view>  
  <view class="swiper-tab-list {{currentTab==2 ? &#39;on&#39; : &#39;&#39;}}" data-current="2" bindtap="swichNav">33</view> 
  <view class="swiper-tab-list {{currentTab==3 ? &#39;on&#39; : &#39;&#39;}}" data-current="3" bindtap="swichNav">44</view> 
  <view class="swiper-tab-list {{currentTab==4 ? &#39;on&#39; : &#39;&#39;}}" data-current="4" bindtap="swichNav">55</view>     
</view>  
  
<swiper current="{{currentTab}}" class="swiper-box" duration="300" style="height:{{winHeight - 31}}px" bindchange="bindChange">  
  <!-- 我是哈哈 -->  
  <swiper-item>  
   <view>我是哈哈</view>  
  </swiper-item>  
  <!-- 我是呵呵 -->  
  <swiper-item>  
   <view>我是呵呵</view>  
  </swiper-item>  
  <!-- 我是嘿嘿 -->  
  <swiper-item>  
   <view>我是嘿嘿</view>  
  </swiper-item>  
  <swiper-item>  
   <view>我是嘿嘿</view>  
  </swiper-item>  
  <swiper-item>  
   <view>我是嘿嘿</view>  
  </swiper-item>  
</swiper>

.swiper-tab{  
  width: 100%;  
  border-bottom: 2rpx solid #777777;  
  text-align: center;  
  line-height: 80rpx; 
  }  
.swiper-tab-list{ font-size: 30rpx;  
  display: inline-block;  
  width: 20%;  
  color: #777777;  
}  
.on{ color: #da7c0c;  
  border-bottom: 5rpx solid #da7c0c;}  
.swiper-box{ display: block; height: 100%; width: 100%; overflow: hidden; }  
.swiper-box view{  
  text-align: center;  
}

var app = getApp()  
Page( {  
 data: {  
  /** 
    * 页面配置 
    */  
  winWidth: 0,  
  winHeight: 0,  
  // tab切换  
  currentTab: 0,  
 },  
 onLoad: function() {  
  var that = this;  
  
  /** 
   * 获取系统信息 
   */  
  wx.getSystemInfo( {  
  
   success: function( res ) {  
    that.setData( {  
     winWidth: res.windowWidth,  
     winHeight: res.windowHeight  
    });  
   }  
  
  });  
 },  
 /** 
   * 滑动切换tab 
   */  
 bindChange: function( e ) {  
  
  var that = this;  
  that.setData( { currentTab: e.detail.current });  
  
 },  
 /** 
  * 点击tab切换 
  */  
 swichNav: function( e ) {  
  
  var that = this;  
  
  if( this.data.currentTab === e.target.dataset.current ) {  
   return false;  
  } else {  
   that.setData( {  
    currentTab: e.target.dataset.current  
   })  
  }   
 }, 
 /** 
 * 点击分享 
 */ 
 onShareAppMessage: function () { 
  return { 
   title: '装逼小程序', 
   path: '/page/user?id=123' 
  } 
 } 
})