yifengxcx/pages/subject/subject.wxml

<view class="top">
  满分{{data.full_mark}}分/{{data.time_limit}}分钟
  <text bindtap="post">交卷</text>
  <view class="count">倒计时 {{time}}</view>
</view>
<!-- 判断 -->
<view class="content" wx:for="{{data.questions}}"  hidden="{{idx != index+1}}" wx:key="idx">
    <view class="num">{{index+1}}、{{item.title}}
    <image wx:if="{{item.type == 1}}" src="../../images/danx.svg" mode="widthFix"></image>
    <image wx:if="{{item.type == 2}}" src="../../images/duox.svg" mode="widthFix"></image>
    <image wx:if="{{item.type == 3}}" src="../../images/pd.svg" mode="widthFix"></image>
    </view>
    <!-- <view class="ques">  {{item.title}}  </view> -->
    <view class="ans">
        <checkbox-group wx:if="{{item.type == 2}}" bindchange='answer' data-id='{{item.id}}'>
            <view wx:for="{{item.options}}" wx:for-item="opt" wx:key="*this">
            <checkbox color="#358BFF" value="{{opt[0]}}">{{opt}}</checkbox></view>
        </checkbox-group>
        <radio-group wx:else bindchange='answer' data-id='{{item.id}}'>
            <view wx:for="{{item.options}}" wx:for-item="opt" wx:key="*this">
            <radio color="#358BFF" value="{{opt[0]}}">{{opt}}</radio></view>
        </radio-group>
    </view>
</view> 

<view class="btn">
    <text class="{{idx<=1?'hide':''}}" bindtap="prev">上一题</text>
    <text class="{{idx>=data.questions.length?'hide':''}}" bindtap="next">下一题</text>
</view>