<view class='container'>
  <view class='top'>
    <textarea bindinput='enterContent' placeholder='请输入您的意见，我们会积极处理并改正的~'></textarea>
    <view class='text_num'>0/200</view>
  </view>

  <view class='bottom' bindtap='sub_btn' >
    提交
  </view>

</view>