微信小程序开发实现的选项卡(窗口顶部/底部TabBar)页面切换功能图文详解

<!--index.wxml--><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>

/**index.wxss**/.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;}

//index.js//获取应用实例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   })  } }})

//app.json{ "pages":[  "pages/index/index",  "pages/logs/logs" ], "window":{  "backgroundTextStyle":"light",  "navigationBarBackgroundColor": "#999999",  "navigationBarTitleText": "tab",  "navigationBarTextStyle":"white" },  "tabBar": {  "color": "#ccc",  "selectedColor": "#35495e",  "borderStyle": "white",  "backgroundColor": "#f9f9f9",  "list": [   {    "text": "首页",    "pagePath": "pages/index/index",    "iconPath": "images/home.png",    "selectedIconPath": "images/home-actived.png"   },   {    "text": "目录",    "pagePath": "pages/catalogue/catalogue",    "iconPath": "images/note.png",    "selectedIconPath": "images/note-actived.png"   },   {    "text": "我的",    "pagePath": "pages/mine/mine",    "iconPath": "images/profile.png",    "selectedIconPath": "images/profile-actived.png"   }  ] }}