"IOS Human Interface Guidelines"--icon and Image Sizes

icon and picture size

Each app requires an app icon and a startup file or picture. In addition, some apps require custom icons to represent app-specific content, features, or patterns in the navigation bar, toolbars, tab bars, and other areas. Table 45-1 lists the dimensions required for these custom icons and pictures.

table 45-1 custom icon and picture size (pixel units)

Useful	iphone 6s Plus and iphone 6 Plus (@3x)	iphone 6s,iphone 6 and iphone 5 (@2x)	iPhone 4s (@2x)	ipad and ipad mini (@2x	ipad 2 and ipad mini (@1x)	iPad Pro (@2x)
App icon (required for all apps)	180*180	120*120	120*120	152*152	76*76	167*167
App icon on App Store (required for all apps)	1024*1024	1024*1024	1024*1024	1024*1024	1024*1024	1024*1024
Start a file or picture (all apps are required)	Use a boot file (view launch files)	Use boot files for iphone 6s and IPhone6 (view launch files) On iphone 5,640*1136	640*960	1536*2048 (vertical) 2048*1536 (horizontal)	768*1024 (vertical) 1024x768 (horizontal)	2048*2732 (vertical) 2732*2048 (horizontal)
Spotlight Search Results icon (recommended)	180*180	For iphone 6s and iphone 6, use 120*120 Use 80*80 for iphone 5	80*80	120*120	60*60	120*120
Set icon (recommended)	87*87	58*58	58*58	58*58	29*29	58*58
Toolbar and navigation bar icons (optional)	Probably 66*66.	Probably 44*44.	Probably 44*44.	Probably 44*44.	Probably 22*22.	Probably 44*44.
tab bar icon (optional)	Probably 75*75 (Max 144*96)	Probably 50*50 (Max 96*64)	Probably 50*50 (Max 96*64)	Probably 50*50 (Max 96*64)	Probably 25*25 (Max 48*32)	Probably 50*50 (Max 96*64)
Web page clip icon (recommended for Web apps and Web pages)	180*180	120*120	120*120	152*152	76*76	167*167

NOTE

If you need to create a custom icon for your home screen quick action, check the home screens quick actions for details. You can also download the Home Screen Quick action icon template from Https://developer.apple.com/design/downloads/Quick-Action-Guides.zip.

The exception to the App Store icon--often called itunesartwork--is that you can name your icon whatever you want. Use the Image Collection portal in your Xcode project to get your app icon files. Assign the corresponding picture file to the collection of pictures in your project to add the icon. During compilation, Xcode adds the appropriate key to your app's info.plist file and prevents the image from being in your app's package. iOS chooses the icon based on the size of the target you are using. View Asset Catalog Help Learn more about the contents of the collection catalog.

For all pictures and icons, the PNG format is recommended. You should avoid using interlaced PNG.

The color depth of the standard icons and pictures is 24 bits.

This article is translated from Apple's official development documentation

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"IOS Human Interface Guidelines"--icon and Image Sizes