<view> <text >带车人签名：text>view>

  <view class="handCenter">

    <canvas class="handWriting" disable-scroll="true" bindtouchstart="uploadScaleStart" bindtouchmove="uploadScaleMove"

bindtouchend="uploadScaleEnd" bindtap="mouseDown" canvas-id="handWriting" style="background:#A1A1A1;">canvas>

  view>

  <view> <text >驾驶员签名：text>view>

    <view class="handCenter">

    <canvas class="handWriting" disable-scroll="true" bindtouchstart="uploadScaleStart" bindtouchmove="uploadScaleMove"

      bindtouchend="uploadScaleEnd" bindtap="mouseDown" canvas-id="handWriting" style="background:#A1A1A1;"> canvas>

  view>

怎么会显示不出来呢，第一个都可以显示的，第二个是直接复制第一个的代码的，求大神解答