dialog+textarea翻车现场。

存在问题，textarea拉起键盘时，textarea跟随页面上推，但dialog不跟随上推，导致textarea错位。是否有解决方案？请指教，谢谢。

WXML：

<!-- 新增需求对话框 -->
<view wx:if="{{currentDialog=='newRequest'}}">
  <view class="weui-mask"></view>
  <view class="weui-dialog margin-lr-sm width-auto">
    <view class="weui-dialog__hd"><strong class="weui-dialog__title">新增支撑需求</strong></view>


    <view class="weui-dialog__bd padding-0 margin-bottom-sm">
      <view class="text-left margin-bottom">
        <view class="weui-cells__group weui-cells__group_form">
          <view class="weui-cells__title flex justify-between"><text>类别</text><text bindtap="bindRequestTypeTips" class='cuIcon-info text-green'></text></view>
          <view class="weui-cells weui-cells_form">
            <view class="weui-cell weui-cell_active weui-cell_select">
              <view class="weui-cell__bd">
                <picker bindchange="bindPickerChange" range="{{arrRequestType}}" data-target="RequestType">
                  <view class="weui-select">{{arrRequestType[selectedRequestType]}}</view>
                </picker>
              </view>
            </view>
          </view>
        </view>
      </view>
      <view class="text-left">
        <view class="weui-cells__group weui-cells__group_form">
          <view class="weui-cells__title">描述</view>
          <view class="weui-cells weui-cells_form">
            <view class="weui-cell">
              <view class="weui-cell__bd">
                <textarea class="weui-textarea" placeholder="请描述你的支撑需求" auto-height cursor-spacing="5" maxlength="120" bindinput="bindNewRequestInputChange" data-target="newRequestInput"></textarea>
                <view class="weui-textarea-counter"><text>{{newRequestInputLength}}</text>/120</view>
              </view>
            </view>
          </view>
        </view>
      </view>
    </view>


    <view class="weui-dialog__ft">
      <a class="weui-dialog__btn weui-dialog__btn_default" bindtap="bindDialogChange" data-target="null">取消</a>
      <a class="weui-dialog__btn weui-dialog__btn_primary {{isNewRequesting?'text-gray':'text-green'}}" bindtap="bindNewRequest"><i wx:if="{{isNewRequesting}}" class="weui-loading"></i>新增</a>
    </view>
  </view>
</view>