image transform:scale 放大在iphone下变模糊

解决：

img标签放大再缩小

img {

width: 300%;
transform: translate3d(-50%, -50%, 0) scale(0.33, 0.33);
-webkit-transform: translate3d(-50%, -50%, 0) scale(0.33, 0.33);
-moz-transform: translate3d(-50%, -50%, 0) scale(0.33, 0.33);
-ms-transform: translate3d(-50%, -50%, 0) scale(0.33, 0.33);

}