<view class="container">
  <view class="canvas">
      <image class="canvas_img" src="{{canvas}}" />
  </view>
  <view class="buy">
      <button class="btn1 bind" bindtap="addShopCart" data-id="{{canvas.goods_id}}">保存到相册</button>
      <button open-type="share" class="btn2 bind">分享到微信</button>
  </view>
</view>