IOS自定义图标和图像

概述 Custom icons and images Description Size for high-resolution iPhone and iPod touch (in pixels) Size for iPhone and iPod touch (in pixels) Size for high-resolution iPad (in pixels) Size for iPad (in p  Custom icons and images

Description	Size for high-resolution iPhone and iPod touch (in pixels)	Size for iPhone and iPod touch (in pixels)	Size for high-resolution iPad (in pixels)	Size for iPad (in pixels)	GuIDelines
Application icon (required for all apps)	114 x 114	57 x 57	144 x 144	72 x 72	“Application Icons”
App icon for the App Store (requiredfor all apps)	1024 x 1024	Launch image ( 640 x 960	320 x 480	1536 x 2008 (portrait) 2048 x 1496 (landscape)	768 x 1004 (portrait) 1024 x 748 (landscape)	“Launch Images”
Small icon for Spotlight search results and Settings (recommended)	58 x 58	29 x 29	100 x 100 (Spotlight search results) 58 x 58 (Settings)	50 x 50 (Spotlight search results) 29 x 29 (Settings)	“Small Icons”
document icon (if necessary for custom document types)	44 x 58	22 x 29	128 x 128 640 x 640	64 x 64 320 x 320	“Document Icons”
Web clip icon (recommended for web apps and websites)	“Web Clip Icons”
Toolbar and navigation bar icon (optional)	Approximately 40 x 40	Approximately 20 x 20	“Icons for Navigation Bars,Toolbars,and Tab Bars”
Tab bar icon (optional)	Approximately 60 x 60	Approximately 30 x 30	Default Newsstand cover icon for the App Store (required for Newsstand apps)	1024 pixels (minimum) on the longest edge	“Newsstand Icons”

Note: For all images and icons,the PNG format is recommended (avoID using interlaced PNGs).

The standard bit depth for icons and images is 24 bits (8 bits each for red,green,and blue),plus an 8-bit Alpha channel.

You do not need to constrain your palette to web-safe colors. Although you can use Alpha transparency in the icons you create for navigation bars,toolbars,and tab bars,do not use it in application icons.

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