What is the corner radius of an OS app icon?
(Note: Now the IOS icon does not need to draw rounded corners, just square is OK)
Inside the brackets is the corresponding radius size
App store (Retina screen) ──────────────1024px (160px)
iTunes Artwork icon ─────────────512px (90px)
App icon(iPhone4s) ──────────────────114px (20px)
App icon(iPhone5s) ──────────────────120px(22px)
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)
iPhone, iPad, Android UI common design size
iPhone：
APPLE APP STORE ICON: 512 x 512 px (80px rounded corners)
iPhone 5 App Icon: 120 x 120 px (22px rounded corners)
iPhone 4 App Icon: 114 x 114 px (20px rounded corners)
iPhone 3GS App Icon：57 x 57 PX (圆角弧度22px)
iPhone 5 326ppi 4英寸1136*640PX
iPhone 4 App UI：960 x 640PX （设计时,高度还需要减去状态栏40PX）
iPhone 3GS App UI：480x 320PX
iPhone的设计尺寸(ios尺寸)
iPhone界面尺寸：
| 设备 | 分辨率 | 状态栏高度 | 导航栏高度 | 标签栏(工具栏)高度 |
| iPhone6 plus设计版 | 1242 × 2208 | 60px | 132px | 146px |
| iOS APP设计一稿支持iPhone5/iPhone6/Plus设计流程 | ||||
| iPhone6 plus物理版 | 1080 × 1920 | 54px | 132px | 146px |
| iOS APP设计一稿支持iPhone5/iPhone6/Plus设计流程 | ||||
| iPhone6 | 750 × 1334 | 40px | 88px | 98px(88px) |
| iPhone5s | 640 × 1136 | 40px | 88px | 98px(88px) |
| iPhone5c | 640 × 1136 | 40px | 88px | 98px(88px) |
| iPhone5 | 640 × 1136 | 40px | 88px | 98px(88px) |
| iPhone4s | 640 × 960 | 40px | 88px | 98px(88px) |
| iPhone4 | 640 × 960 | 40px | 88px | 98px(88px) |
iPhone图标尺寸：
| 系统 | 分辨率 | 圆角大小 |
| iOS 6- | 90px – 1024px | 约为图标宽度 × 0.175 |
| iOS 7+ | 90px – 1024px | 约为图标宽度 × 0.225 |
| Asset | iPhone 6 Plus (@3x) | iPhone 6 and iPhone 5 (@2x) | iPhone 4s (@2x) | iPad and iPad mini (@2x) | iPad 2 and iPad mini (@1x) |
| App icon (required for all apps) |
180 × 180 | 120 × 120 | 120 × 120 | 152 × 152 | 76 × 76 |
| App icon for the App Store (required for all apps) |
1024 × 1024 | 1024 × 1024 | 1024 × 1024 | 1024 × 1024 | 1024 × 1024 |
| Launch file or image (required for all apps) |
Use a launch file (see Launch Images) |
For iPhone 6, use a launch file (see Launch Images) For iPhone 5, 640 × 1136 |
640 × 960 | 1536 × 2048 (portrait) 2048 × 1536 (landscape) |
768 × 1024 (portrait) 1024 × 768 (landscape) |
| Spotlight search results icon (recommended) |
120 × 120 | 80 × 80 | 80 × 80 | 80 × 80 | 40 × 40 |
| Settings icon (recommended) |
87 × 87 | 58 × 58 | 58 × 58 | 58 × 58 | 29 × 29 |
| Toolbar and navigation bar icon (optional) |
About 66 × 66 | About 44 × 44 | About 44 × 44 | About 44 × 44 | About 22 × 22 |
| Tab bar icon (optional) |
About 75 × 75 (maximum: 144 × 96) |
About 50 × 50 (maximum: 96 × 64) |
About 50 × 50 (maximum: 96 × 64) |
About 50 × 50 (maximum: 96 × 64) |
About 25 × 25 (maximum: 48 × 32) |
| Default Newsstand cover icon for the App Store (required for Newsstand apps) |
At least 1024 pixels on the longest edge | At least 1024 pixels on the longest edge | At least 1024 pixels on the longest edge | At least 1024 pixels on the longest edge | At least 512 pixels on the longest edge |
| Web clip icon (recommended for web apps and websites) |
180 × 180 | 120 × 120 | 120 × 120 | 152 × 152 | 76 × 76 |
iPad的设计尺寸
iPad界面尺寸：
| 设备 | 分辨率 | 状态栏高度 | 导航栏高度 | 标签栏高度 |
| iPad6/iPad Air2 | 2048 × 1536 | 40px | 88px | 98px |
| iPad5/iPad Air/ipad mini 2 | 2048 × 1536 | 40px | 88px | 98px |
| iPad4/ipad mini | 2048 × 1536 | 40px | 88px | 98px |
| iPad3/the new iPad | 2048 × 1536 | 40px | 88px | 98px |
| iPad2 | 1024 × 768 | 20px | 44px | 49px |
| iPad1 | 1024 × 768 | 20px | 44px | 49px |
| iPad Mini | 1024 × 768 | 20px | 44px | 49px |
iPad图标尺寸：
| 系统 | 分辨率 | 圆角大小 |
| iOS 6- | 90px – 1024px | 约为图标宽度 × 0.175 |
| iOS 7+ | 90px – 1024px | 约为图标宽度 × 0.225 |
| Asset | iPhone 6 Plus (@3x) | iPhone 6 and iPhone 5 (@2x) | iPhone 4s (@2x) | iPad and iPad mini (@2x) | iPad 2 and iPad mini (@1x) |
| App icon (required for all apps) |
180 × 180 | 120 × 120 | 120 × 120 | 152 × 152 | 76 × 76 |
| App icon for the App Store (required for all apps) |
1024 × 1024 | 1024 × 1024 | 1024 × 1024 | 1024 × 1024 | 1024 × 1024 |
| Launch file or image (required for all apps) |
Use a launch file (see Launch Images) |
For iPhone 6, use a launch file (see Launch Images) For iPhone 5, 640 × 1136 |
640 × 960 | 1536 × 2048 (portrait) 2048 × 1536 (landscape) |
768 × 1024 (portrait) 1024 × 768 (landscape) |
| Spotlight search results icon (recommended) |
120 × 120 | 80 × 80 | 80 × 80 | 80 × 80 | 40 × 40 |
| Settings icon (recommended) |
87 × 87 | 58 × 58 | 58 × 58 | 58 × 58 | 29 × 29 |
| Toolbar and navigation bar icon (optional) |
About 66 × 66 | About 44 × 44 | About 44 × 44 | About 44 × 44 | About 22 × 22 |
| Tab bar icon (optional) |
About 75 × 75 (maximum: 144 × 96) |
About 50 × 50 (maximum: 96 × 64) |
About 50 × 50 (maximum: 96 × 64) |
About 50 × 50 (maximum: 96 × 64) |
About 25 × 25 (maximum: 48 × 32) |
| Default Newsstand cover icon for the App Store (required for Newsstand apps) |
At least 1024 pixels on the longest edge | At least 1024 pixels on the longest edge | At least 1024 pixels on the longest edge | At least 1024 pixels on the longest edge | At least 512 pixels on the longest edge |
| Web clip icon (recommended for web apps and websites) |
180 × 180 | 120 × 120 | 120 × 120 | 152 × 152 | 76 × 76 |
Android的设计尺寸：
屏幕尺寸
指实际的物理尺寸，为屏幕对角线的测量。
为了简单起见，Android把实际屏幕尺寸分为四个广义的大小：小，正常，大，特大。
像素（PX）
代表屏幕上一个物理的像素点代表屏幕上一个物理的像素点。
屏幕密度
为解决Android设备碎片化，引入一个概念DP，也就是密度。指在一定尺寸的物理屏幕上显示像素的数量，通常指分辨率。 为了简单起见，Android把屏幕密度分为了四个广义的大小：低（120dpi）、中（160dpi）、高（240dpi）和超高（320dpi） 像素= DP * （ DPI / 160 ) 例如，在一个240dpi的屏幕里，1DP等于1.5PX。
于设计来说，选取一个合适的尺寸作为正常大小和中等屏幕密度（尺寸的选取依据打算适配的硬件，建议参考现主流硬件分辨率），然后向下和向上 做小、大、特大和低、高、超高的尺寸与密度。
典型的设计尺寸
• 320dp：一个普通的手机屏幕（240X320，320×480，480X800）
• 480dp：一个中间平板电脑像（480×800）
• 600dp：7寸平板电脑（600×1024）
• 720dp：10寸平板电脑（720×1280，800×1280）
对于分辨率繁多的android设备，为了方便原生应用的界面适配，Google按照dpi大小将它们分成了4中模式（MDPI、HDPI、XHDPI和XXHDPI，现在 Android 4.3 已经有了XXXHDPI）：
屏幕DIP类型: xxhdpi xhdpi hdpi mdpi ldpi
ICON尺寸： 144*144 96*96 72*72 48*48 36*36
随便说一下现在安卓设计稿尺寸设定：
Android Android system dp/sp/px conversion table
| name | Resolution | ratio rate (for 320px) | ratio rate (for 640px) | ratio rate (for 750px) |
| idpi | 240 × 320 | 0.75 | 0.375 | 0.32 |
| mdpi | 320 × 480 | 1 | 0.5 | 0.4267 |
| hdpi | 480 × 800 | 1.5 | 0.75 | 0.64 |
| xhdpi | 720 × 1280 | 2.25 | 1.125 | 1.042 |
| xxhdpi | 1080 × 1920 | 3.375 | 1.6875 | 1.5 |
Mainstream Android phone resolutions and sizes
| equipment | Resolution | size | equipment | Resolution | size |
| Samsung Galaxy S3 | 4.8 inches | 720 × 1280 | Samsung Galaxy S4 | 5 inches | 1080 × 1920 |
| Samsung Galaxy S5 | 5.1 inches | 1080 × 1920 | Samsung Galaxy S6 | 4.5 inches | 1200 × 1920 |
| Xiaomi 1 | 4 inches | 480 × 854 | Xiaomi 1s | 4 inches | 480 × 854 |
| Xiaomi 2 | 4.3 inches | 720 × 1280 | Xiaomi 2s | 4.3 inches | 720 × 1280 |
| XiaoMi3 | 5 inches | 1080 × 1920 | Xiaomi 3s (concept) | 5 inches | 1080 × 1920 |
| Xiaomi 4 | 5 inches | 1080 × 1920 | Red rice | 4.7 inches | 720 × 1280 |
| Redmi Note | 5.5 inches | 720 × 1280 | |||
| OPPO Find 7 | 5.5 inches | 1440 × 2560 | OPPO Find 7 Lite | 5.5 inches | 1080 × 1920 |
| OPPO N1 mini | 5 inches | 720 × 1280 | OPPO R3 | 5 inches | 720 × 1280 |
| OPPO R1S | 5 inches | 720 × 1280 | |||
| Hammer Smartisan T1 | 4.95 inches | 1080 × 1920 | |||
| Huawei Ascend P7 | 5 inches | 1080 × 1920 | Huawei Ascend Mate7 | 6 inches | 1080 × 1920 |
| Huawei Honor 6 | 5 inches | 1080 × 1920 | Huawei Ascend Mate2 | 6.1 inches | 720 × 1280 |
| Huawei C199 | 5.5 inches | 720 × 1280 | |||
| HTC One (M8) | 5 inches | 1080 × 1920 | HTC Desire 820 | 5.5 inches | 720 × 1280 |
| Meizu MEIZU MX4 | 5.36 inches | 1152 × 1920 | Meizu MEIZU MX3 | 5.1 inches | 1080 × 1800 |