<view class="poster">
  <view class="title">分享海报到朋友圈</view>
  <canvas canvas-id="myCanvas" style="width: 610px;height:1168px;position: fixed;top: -10000px;">
  </canvas>
  <view class="poster-img">
    <image src="{{shareImage}}"></image>
    <canvas class='canvas' style="width:50px; height:50px;" canvas-id='myQrcode'></canvas>
  </view>

  <view class="save-album" bindtap="onSaveAlbum">
    保存至相册，分享到朋友圈
  </view>
</view>