微信小程序实现页面tab切换
问题背景
客户端开发过程中，实现页面切换是一个很常见的场景，本文将介绍一下微信小程序是如何实现页面tab切换的。
问题分析
小程序一个页面相关的文件结构如下： 
问题解决
话不多说直接上代码。 (1)index.js，代码如下：
const app = getApp()
Page({
data: {
currentIndex: 0, //默认是活动项
},
data: {
currentData:0,
},
//获取当前滑块的index
bindchange(e){
const that = this;
that.setData({
currentData: e.detail.current
})
},
//点击切换，滑块index赋值
checkCurrent(e){
const that = this;
if (that.data.currentData === e.target.dataset.current){
return false;
}else{
that.setData({
currentData: e.target.dataset.current
})
}
},
//上一题
prevClick(){
var currentData = this.data.currentData - 1
if(currentData + 1 == 0){
wx.showToast({
title: '这是第1题了',
})
}else{
this.setData({
currentData:currentData
})
}
},
//下一题
nextClick(){
var currentData = this.data.currentData + 1
if(currentData + 1 == 7){
wx.showToast({
title: '这是第6题了',
})
}else{
this.setData({
currentData:currentData
})
}
},
})(2)index.wxml，代码如下：
<view class="bgwhite">
<scroll-view scroll-x="true">
<view class="content">
<view class="f32 c666 p-tb-20 p-lr-30 {{currentData == 0 ? 'topic' : ''}}" data-current="0" bindtap='checkCurrent'>第1题</view>
<view class="f32 c666 p-tb-20 p-lr-30 {{currentData == 1 ? 'topic' : ''}}" data-current="1" bindtap='checkCurrent'>第2题</view>
<view class="f32 c666 p-tb-20 p-lr-30 {{currentData == 2 ? 'topic' : ''}}" data-current="2" bindtap='checkCurrent'>第3题</view>
<view class="f32 c666 p-tb-20 p-lr-30 {{currentData == 3 ? 'topic' : ''}}" data-current="3" bindtap='checkCurrent'>第4题</view>
<view class="f32 c666 p-tb-20 p-lr-30 {{currentData == 4 ? 'topic' : ''}}" data-current="4" bindtap='checkCurrent'>第5题</view>
<view class="f32 c666 p-tb-20 p-lr-30 {{currentData == 5 ? 'topic' : ''}}" data-current="5" bindtap='checkCurrent'>第6题</view>
</view>
</scroll-view>
</view>
<swiper current="{{currentData}}" class='width100' style="height:600px;" duration="300" bindchange="bindchange">
<swiper-item>
<view class="m-lr-20">
<view class="row p-t-30 p-b-10">
<view class="radio_singel f22 p-lr-10">单选</view>
<view class="m-l-20 weight500 f28">题目1</view>
</view>
<radio-group bindchange="radioChange">
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio checked="true" color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">A、1111</view>
</label>
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">B、2222</view>
</label>
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">C、3333</view>
</label>
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">D、4444</view>
</label>
</radio-group>
</view>
</swiper-item>
<swiper-item>
<view class="m-lr-20">
<view class="row p-t-30 p-b-10">
<view class="radio_singel f22 p-lr-10">单选</view>
<view class="m-l-20 weight500 f28">题目2</view>
</view>
<video src="" style="width:100%;"></video>
<radio-group bindchange="radioChange">
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio checked="true" color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">A、1111</view>
</label>
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">B、2222</view>
</label>
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">C、3333</view>
</label>
<label class="row alignitems bgwhite p-tb-25 p-lr-20 radius15 m-t-20">
<view class="weui-cell__hd">
<radio color="#1989f9"/>
</view>
<view class="f30 weight500 m-l-10">D、4444</view>
</label>
</radio-group>
</view>
</swiper-item>
<swiper-item>
</swiper-item>
<swiper-item>
</swiper-item>
<swiper-item>
</swiper-item>
<swiper-item>
</swiper-item>
</swiper>
<view class="footer p-tb-25">
<view class="m-lr-30 row just-btw">
<view class="row alignitems" bindtap="prevClick">
<view class="f36 weight500 m-l-10">上一题</view>
</view>
<view class="jiaojuanbtn f30 white p-tb-20">交卷</view>
<view class="row alignitems" bindtap="nextClick">
<view class="f36 weight500 m-r-10">下一题</view>
</view>
</view>
</view>(3)index.wxss，代码如下：
.topic{
position: relative;
color:#000;
}
.content{
display: flex;
justify-content: space-around;
flex-direction: row;
}
.topic::before{
position: absolute;
content:"";
width:80rpx;
height:6rpx;
background: #1989f9;
border-radius: 20rpx;
bottom: 0;
left:50%;
transform: translateX(-50%);
}
.radio_singel{
background: #e6f7ff;
border:1px solid #91d4fe;
color:#1890ff;
}
.footer{
position: fixed;
bottom: 0;
background-color: #fff;
left:0;
right:0;
}运行结果如下： 
文章来源：https://www.toymoban.com/news/detail-766735.html
问题总结
本文主要介绍了微信小程序是实现页面tab切换的一种方案，有兴趣的同学可以进一步深入研究。文章来源地址https://www.toymoban.com/news/detail-766735.html
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