iPhone和iPad应用图标圆角参数标准

iTunes Artwork icon ──────512px (90px) App icon(iPhone4) ──────114px (20px) App icon(iPad) ──────72px (12px) App icon(iPhone 3G/3GS) ──────57px(10px) Spotlight/Settings icon icon(iPhone4) ──────58px (10px) Spotlight/Settings icon icon(iPhone 3G/3GS/iPad) ──────29px (9px)