以上代码完整的代码

完整的代码如下所示：

const handleShare = (text) => {
  const canvas = document.getElementById('canvasStyle') as HTMLCanvasElement;
  if (!canvas) {
    console.error('canvas不存在');
    return;
  }
  const ctx = canvas.getContext('2d');
  const img = new Image();
  img.onload = function () {
    ctx.drawImage(img, 0, 0);
  };
  img.src = text;
  if (!img.complete) {
    img.onload = function () {
      ctx.drawImage(img, 0, 0);
    };
  }
  Taro.canvasToTempFilePath({
    canvasId: 'canvasStyle',
    success: res => {
      const imageUrl = res.tempFilePath;
      Taro.updateShareMenu({
        withShareTicket: true,
        success: () => {
          Taro.showShareImageMenu({
            imageUrl,
            success: res => {
              console.log('分享成功', res);
            },
            fail: res => {
              console.log('分享失败', res);
            }
          });
        },
        fail: res => {
          console.log('更新转发菜单失败', res);
        }
      });
    },
    fail: res => {
      console.log('生成图片失败', res);
      Taro.showToast({
        title: '生成分享图片失败',
        icon: 'none'
      });
    }
  });
}