小程序实现页面tab切换

index.wxml

<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>

index.js

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
      })
  }
},
})

index.wxss

.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;
}

来源：https://blog.csdn.net/weixin_39033300/article/details/130367944