示例代码是这样的

<view class="cu-form-group margin-top">
            <view class="title">普通选择</view>
            <picker bindchange="PickerChange" value="{{index}}" range="{{picker}}">
              <view class="picker">
               {{picker[index]}}
              </view>
            </picker>
          </view>

因为业务需求，需要动态取

不循环的情况下是可以正常显示点击回绑

，然后我加了两个嵌套循环，就不能正常点击回绑了

             <block wx:for="{{messageCenterList}}" wx:key>
      <block wx:if="{{isnew==0}}">     
<view class="cu-form-group" wx:if="{{item.formType=='select'}}">
    <view class="cu-form-group margin-top">
            <view class="title">普通选择</view>
            <picker bindchange="PickerChange" value="{{index}}" range="{{picker}}">
              <view class="picker">
               {{picker[index]}}
              </view>
            </picker>
          </view>
      </block>
    </block>