这是否在> iOS 5？
.element {
background: url(images/myImage.jpg) 50% 0 no-repeat fixed;
}
我认为它应该是，但到目前为止，它不是。
解决方法
根据这个
background-attachment support matrix，不。
Another post建议，提出移动设备的解决方法是不值得的：
…both Android and iPhone block timers or render during scroll,so the effect is that divs move with the scrolled page and only after,eventually,divs come back in the expected position. This is against position fixed idea
