wechat-pilelog/pages/sign/sign.wxml

<!--pages/sign/sign.wxml-->
<view class='container'>
  <!-- 签名画布 -->
  <canvas class="canvas" id="canvas" canvas-id="canvas" disable-scroll="true" bindtouchstart="canvasStart" bindtouchmove="canvasMove" bindtouchend="canvasEnd" touchcancel="canvasEnd" binderror="canvasIdErrorCallback">
 
  </canvas>
 
  <view class='buttonBox'>
    <button bindtap='clickMe' class='addbutton'>确定</button>
    <button class='delbutton' bindtap="cleardraw">清除</button>
    <button bindtap='goWorksheet' class='addbutton' >返回</button>
  </view>
</view>