iPhone UI 设计的一些标准尺寸1

iPhone开发中经常用到的控件尺寸大集合

Sizes of iPhone UI Elements

Element	Size (in points)
Window (including status bar)	320 x 480 pts
Status Bar (How to hide the status bar)	20 pts
View inside window  (visible status bar)	320 x 460
Navigation Bar	44 pts
Nav Bar Image / Toolbar Image	up to 20 x 20 pts (transparent PNG)
Tab Bar	49 pts
Tab Bar Icon	up to 30 x 30 pts (transparent PNGs)
Text Field	31 pts
Height of a view inside  a navigation bar	416 pts
Height of a view inside  a tab bar	411 pts
Height of a view inside  a navbar and a tab bar	367 pts
Portrait Keyboard height	216 pts
Landscape Keyboard height	140 pts

Points vs. Pixels
The iPhone 4 introduced a high resolution display with twice the pixels of previous iPhones. However you don't have to modify your code to support high-res displays; the coordinate system goes by points rather than pixels, and the dimensions in points of the screen and all UI elements remain the same.
iOS 4 supports high resolution displays (like the iPhone 4 display) via the  scale property on UIScreen, UIView, UIImage, and CALayer classes. If the object is displaying high-res content, its scale property is set to 2.0. Otherwise it defaults to 1.0.
All you need to do to support high-res displays is to provide @2x versions of the images in your project. See the  checklist for updating to iOS4 or Apple documentation for  Supporting High Resolution Screens for more info.
Adjusting Sizes
Click here to see how to adjust  View Frames and Bounds.
Additional References

• Apple Documentation: Points vs. Pixels
• Apple Documentation: UIBarButtonItem Class Reference says "Typically, the size of a toolbar and navigation bar image is 20 x 20 points."
• Apple Documentation: UITabBarItem Class Reference says "The size of an tab bar image is typically 30 x 30 points."

Table 8-1  Custom icons and images

Description	Size for iPhone and iPod touch (in pixels)	Size for iPad (in pixels)	Guidelines
Application icon (required for all apps)	57 x 57 114 x 114 (high resolution)	72 x 72	“Application Icons”
App Store icon (required for all apps)	512 x 512	512 x 512	“Application Icons”
Launch image (required for all apps)	320 x 480 640 x 960 (high resolution)	For portrait: 768 x 1004 For landscape: 1024 x 748	“Launch Images”
Small icon for Spotlight search results and Settings (recommended)	29 x 29 58 x 58 (high resolution)	50 x 50 for Spotlight search results 29 x 29 for Settings	“Small Icons”
Document icon (recommended for custom document types)	22 x 29 44 x 58 (high resolution)	64 x 64 320 x 320	“Document Icons”
Web clip icon (recommended for web apps and websites)	57 x 57 114 x 114 (high resolution)	72 x 72	“Web Clip Icons”
Toolbar and navigation bar icon (optional)	Approximately 20 x 20 Approximately 40 x 40 (high resolution)	Approximately 20 x 20	“Icons for Navigation Bars, Toolbars, and Tab Bars”
Tab bar icon (optional)	Approximately 30 x 30 Approximately 60 x 60 (high resolution)	Approximately 30 x 30	“Icons for Navigation Bars, Toolbars, and Tab Bars”
Newsstand icon for the App Store (requiredfor Newsstand apps)	At least 512 pixels on the longest edge	At least 512 pixels on the longest edge	“Newsstand Icons”

转自：http://blog.csdn.net/jiayou8809/article/details/8488401