【iOS游戏开发】icon那点事 之 图标大小查询(一)

图标的圆角和光晕效果

圆角效果。图标的圆角效果是系统自动加上的，我们不能控制。这也是为什么我们看到的每个图标，其圆角效果是完全相同的。

光晕效果。光晕效果也是系统加上的，和“圆角”不同的是，光晕效果是一个可选项。我们可以通过设置app的光晕参数（UIPrerenderedIcon），告诉系统是否要为我们的图标打上光晕效果。

总结：1）设计图标时请记得，图标的圆角效果是系统自动加上的，且是我们无法控制的。 2）设计图标前先决定，是否要使用系统内建的“光晕效果”。

每个图标都有相同的圆角。左边的两个图标有光晕效果，右边的两个没有。

列出了图标大小对应的表

Table 8-1  Size (in pixels) of custom icons and images

Description	Size for iPhone 5 and iPod touch (5th generation)	Size for high-resolution iPhone and iPod touch	Size for iPhone and iPod touch	Size for high-resolution iPad	Size for iPad	Guidelines
App icon (required for all apps)	114 x 114	114 x 114	57 x 57	144 x 144	72 x 72	“App Icons”
App icon for the App Store (required for all apps)	1024 x 1024 (recommended)	1024 x 1024 (recommended)	512 x 512	1024 x 1024 (recommended)	512 x 512	“App Icons”
Launch image (required for all apps)	640 x 1136	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	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”
Web clip icon (recommended for web apps and websites)	114 x 114	114 x 114	57 x 57	144 x 144	72 x 72	“Web Clip Icons”
Toolbar and navigation bar icon (optional)	Approximately 40 x 40	Approximately 40 x 40	Approximately 20 x 20	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 60 x 60	Approximately 30 x 30	Approximately 60 x 60	Approximately 30 x 30	“Icons for Navigation Bars, Toolbars, and Tab Bars”
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 512 pixels on the longest edge	At least 1024 pixels on the longest edge	At least 512 pixels 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 app icons.

Launch Images

增加一个启动画面能改进用户体验，比如显示界面的一张背景

Supply a launch image to improve user experience.

For iPhone and iPod touch launch images, include the status bar region. Create launch images of the following sizes.

For standard iPhone and iPod touch devices:

• 320 x 480 pixels

• 640 x 960 pixels (high resolution)

For apps that run on iPhone 5 and iPod touch (5th generation), create a launch image that measures 640 x 1136 pixels.

For iPad launch images, do not include the status bar region. Create launch images of these sizes (most iPad apps should supply a launch image for each orientation):

• For portrait:

  • 768 x 1004 pixels

  • 1536 x 2008 pixels (high resolution)

• For landscape:

  • 1024 x 748 pixels

  • 2048 x 1496 pixels (high resolution)

Small Icons

小图标用于搜索和设置

 

For iPhone and iPod touch, iOS uses the same icon for both Spotlight search results and Settings. If you do not provide this icon, iOS might shrink your app icon for display in search results and in Settings. For your iPhone app, create two small icons that measure:

• 29 x 29 pixels

• 58 x 58 pixels (high resolution)

For iPad, you supply separate icons for Settings and Spotlight search results. For Settings on iPad, create two icons that measure:

• 29 x 29 pixels

• 58 x 58 pixels (high resolution)

For Spotlight search results on iPad, create two icons that measure:

• 50 x 50 pixels

• 100 x 100 pixels (high resolution)

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