tyjs_wxapp/pages/exam/paper/paper.wxml

<wxs module="filter" src="../../../wxs/exam-fun.wxs"></wxs>
  <view class="exam-page mt0">
    <view >
      <i-button  bindtap="emptyAnswer" type="primary" size="default">清空重做</i-button>
    </view>

    <form bindsubmit='formSubmit'>  
      <i-panel 
        wx:for="{{list}}" 
          wx:for-item="item" 
          wx:key="answerId" 
          i-class="exam-panel-title"> 
        
        <i-cell-group i-class="exam-cell">
          <!-- 单选题 -->
           <i-cell wx:if="{{item.type ==2}}"> 
            <view class="single">
              <rich-text nodes="{{index+1}}.[单]{{item.title}}" />
              <radio-group class="radio-answer" bindchange="radioChange" data-index="{{index}}" >
                <label class="radio" wx:for="{{preList}}" wx:for-item="answer" wx:key="anserIndex" wx:if="{{item['answer'+(index+1)]}}">
                  <view class="radio-answer">
                    <radio color="#2d8cf0" value="{{index+1}}" checked="{{item.select==index+1}}"  disabled="{{item.select>0?true:false}}" >
                      {{preList[index]}}. {{item['answer'+(index+1)]}}
                    </radio>
                  </view>
                </label>
              </radio-group>

              <view class="exam-clear mt20" wx:if="{{item.select>0}}" >
                <view class="exam-extend-item" >
                  答题结果:
                  <text class="question-answer-right question-answer-result" 
                    wx:if="{{item.select==item.result}}">正确
                  </text>
                  <text class="question-answer-error question-answer-result" 
                    wx:else>错误</text>
                </view>

                <view class="exam-extend-item">
                  正确答案:
                  <text wx:if="{{item.type==2}}"> {{preList[item.result-1]}}</text>
                </view>
              </view>
            </view>
          </i-cell> 
          <!-- 多选题 -->
          <i-cell wx:if="{{item.type==3}}"> 
            <view >
              <rich-text nodes="{{index+1}}.[多]{{item.title}}" />
              <checkbox-group class="checkbox-answer" style="margin-top:30rpx" bindchange="checkboxChange" data-index="{{index}}">
                <label class="checkbox" wx:for="{{preList}}" wx:for-item="answer" wx:key="" wx:if="{{item['answer'+(index+1)]}}">
                  <view class="checkbox-answer">
                    <checkbox color="#2d8cf0" value="{{index+1}}" disabled="{{!!item._select}}" checked="{{filter.isSelect(index+1,item.select)}}">
                      {{answer}}. {{item['answer'+(index+1)]}}
                    </checkbox>
                  </view>
                </label>
                
              </checkbox-group>

            </view>

            <view class="exam-clear mt20"  wx:if="{{isFinish || item._select}}">
                <view class="exam-extend-item" >
                  答题结果:
                  <text class="question-answer-right question-answer-result" 
                    wx:if="{{item.select==item.result}}">正确
                  </text>
                  <text class="question-answer-error question-answer-result" 
                    wx:else>错误</text>
                </view>
                <view class="exam-extend-item">
                  正确答案:
                  <text> {{filter.getMultResult(item.result)}}</text>
                </view>
              </view>

          </i-cell>
          <!-- 判断 -->
          <i-cell wx:if="{{item.type==1}}"> 
            <view>
              <rich-text nodes="{{index+1}}.[判]{{item.title}}" />
              <radio-group class="radio-answer" bindchange="radioChange" data-index="{{index}}" >
                <label class="radio" wx:for="{{2}}" wx:for-item="answer" >
                  <view class="radio-answer">
                    <radio color="#2d8cf0" value="{{index+1}}" checked="{{item.select==index+1}}" disabled="{{item.select>0?true:false}}" >
                      {{preList[index]}}. {{item['answer'+(index+1)]}}
                    </radio>
                  </view>
                </label>
              </radio-group>
            </view>
            <view class="exam-clear mt20" wx:if="{{ item.select>0}}" >
                <view class="exam-extend-item" >
                  答题结果:
                  <text class="question-answer-right question-answer-result" 
                    wx:if="{{item.select==item.result}}">正确
                  </text>
                  <text class="question-answer-error question-answer-result" 
                    wx:else>错误</text>
                </view>
                <view class="exam-extend-item">
                  正确答案:
                  <text> {{item.result==1?'正确':'错误'}}</text>
                </view>
              </view>
          </i-cell>
        </i-cell-group>

      </i-panel>
    </form>
  </view>