微信小程序实现顶部选项卡(swiper)

微信小程序顶部选项卡在开发中是非常常用的，下面用一点时间实现了一下。

效果图：

下面直接上代码:

wxml:

<!--pages/index/index.wxml--> 
<view class="swiper-tab"> 
 <view class="tab-item {{currentTab==0 ? 'on' : ''}}" data-current="0" bindtap="swichNav">选项一</view> 
 <view class="tab-item {{currentTab==1 ? 'on' : ''}}" data-current="1" bindtap="swichNav">选项二</view> 
 <view class="tab-item {{currentTab==2 ? 'on' : ''}}" data-current="2" bindtap="swichNav">选项三</view> 
</view> 
 
<swiper current="{{currentTab}}" class="swiper" duration="300" style="height:{{winHeight - 30}}px" bindchange="bindChange"> 
 <swiper-item> 
 <view>页面一</view> 
 </swiper-item> 
 <swiper-item> 
 <view>页面二</view> 
 </swiper-item> 
 <swiper-item> 
 <view>页面三</view> 
 </swiper-item> 
</swiper> 

wxss:

/* 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; 
} 

js:

// pages/index/index.js 
Page({ 
 
 /** 
 * 页面的初始数据 
 */ 
 data: { 
 winWidth:0, 
 winHeight:0, 
 currentTab:0 
 }, 
 
 /** 
 * 生命周期函数--监听页面加载 
 */ 
 onLoad: function (options) { 
 var that = this; 
 
 /** 
 * 获取系统信息 
 */ 
 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 
 }) 
 } 
 } , 
 /** 
 * 页面相关事件处理函数--监听用户下拉动作 
 */ 
 onPullDownRefresh: function () { 
 
 }, 
 
 /** 
 * 页面上拉触底事件的处理函数 
 */ 
 onReachBottom: function () { 
 
 }, 
 
 /** 
 * 用户点击右上角分享 
 */ 
 onShareAppMessage: function () { 
 
 } 
}) 

以上是实现过程，总体上没什么难度。可以参考参考。