正常情况多个img的onload都会执行，并绘制在canvas中，但是代码片段的3个图片就第一个正常打印和绘制；微信版本小程序是正常的，已经修复，是不是企业版本小程序的没有同步修复此问题！！！！

 // 图片一
        const img1 = canvas.createImage()
        img1.onload = () => {
          console.log('image加载1')
          ctx.drawImage(img1, 0, 0, 212 * pixelRatio, 252 * pixelRatio);
        }
        img1.src =
          'https://04imgmini.eastday.com/mobile/20200221/20200221145849_ec140e3a1e41ed934380fce0f7812e33_1.jpeg'
        // 图片二
        const img2 = canvas.createImage()
        img2.onload = () => {
          console.log('image加载2')
          ctx.drawImage(img2, 0, 252 * pixelRatio, 212 * pixelRatio, 252 * pixelRatio);
        }
        img2.onerror = (res) => {
          console.log('图片二加载失败',res)
        }
        img2.src = 'https://04imgmini.eastday.com/mobile/20200221/20200221145849_ec140e3a1e41ed934380fce0f7812e33_1.jpeg'
        // 图片三
        const img3 = canvas.createImage()
        img3.onload = () => {
          console.log('image加载3')
          ctx.drawImage(img3, 0, 500 * pixelRatio, 212 * pixelRatio, 252 * pixelRatio);
        }
        img3.onerror = (res) => {
          console.log('图片三加载失败',res)
        }
        img3.src = 'https://04imgmini.eastday.com/mobile/20200221/20200221145849_ec140e3a1e41ed934380fce0f7812e33_1.jpeg'