有谁知道如何使这项工作？
在css中
background:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAAYUlEQVR42mP4////P1IwA5RBNIBr+Pj5+/9Tlx78v373OYoCkBgIY2gACWr7tP63CO8BanoBlmyfuQssBsIYGtAVLNpwEsMADA0gAFMIw+hOpEwDSU4i2dMkByvJEUcsAABHaALCQIZDrAAAAABJRU5ErkJggg==");
错误：
Fatal error: Uncaught exception 'LogicException' with message `'"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAAYUlEQVR42mP4////P1IwA5RBNIBr+Pj5+/9Tlx78v373OYoCkBgIY2gACWr7tP63CO8BanoBlmyfuQssBsIYGtAVLNpwEsMADA0gAFMIw+hOpEwDSU4i2dMkByvJEUcsAABHaALCQIZDrAAAAABJRU5ErkJggg==" has not been cached as file "public/cache/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAwAAAAMCAYAAABWdVznAAAAYUlEQVR42mP4////P1IwA5RBNIBr+Pj5+/9Tlx78v373OYoCkBgIY2gACWr7tP63CO8BanoBlmyfuQssBsIYGtAVLNpwEsMADA0gAFMIw+hOpEwDSU4i2dMkByvJEUcsAABHaALCQIZDrAAAAABJRU5ErkJggg=="' in vendor/neilime/zf2-assets-bundle/src/AssetsBundle/Service/Service.php on line 855`
是否有基本64位编码媒体的内置解决方案，例如这个png？