[BGF]修复二维码中间的图片跨域导致canvas.toDataURL报错 #35
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如上图,设置二维码中间的图片是第三方网络资源图时,会报如下canvas里的图片跨域的错
修复:在loadImage方法里面设置crossOrigin 属性,允许跨域,虽然这只对静态资源服务器设置了access-control-allow-origin: *的图片有效,但还是可以满足大部分场景的需求