微信小程序实现选项卡效果

.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: 33.33%; 
  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; 
} 

<view class=\"swiper-tab\"> 
  <view class=\"swiper-tab-list {{currentTab==0 ? \'on\' : \'\'}}\" data-current=\"0\" bindtap=\"swichNav\">哈哈</view> 
  <view class=\"swiper-tab-list {{currentTab==1 ? \'on\' : \'\'}}\" data-current=\"1\" bindtap=\"swichNav\">呵呵</view> 
  <view class=\"swiper-tab-list {{currentTab==2 ? \'on\' : \'\'}}\" data-current=\"2\" bindtap=\"swichNav\">嘿嘿</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> 

Page( { 
 data: { 
  /** 
    * 页面配置 
    */ 
  winWidth: 0, 
  winHeight: 0, 
  // tab切换 
  currentTab: 0, 
 }, 
  : 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 
   }) 
  } 
 } 
})