text:  <view class="container">
    <view class="stage">计数器数值：{{count}}</view>
    <view>
      步数值：
      <input placeholder="请输入步数" auto-focus value='{{inputValue}}' bindinput='inputChange'/>
    </view>
    <view>
      <button bind:tap='plus'>+</button>
      <button style='margin-left: 20rpx;' bind:tap='sub'>-</button>
    </view>
  </view>