iPhone开发中经常用到的控件尺寸大集合

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原帖地址：http://www.cocoachina.com/bbs/read.php?tid=59387

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 BarImage/ 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 navbaranda 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 yourcodeto 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.
iOS4 supports high resolution displays (like the iPhone 4 display) via thescaleproperty 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 thechecklist for updating to iOS4orAppledocumentation forSupporting High Resolution Screensfor more info.
Adjusting Sizes
Click here to see how to adjustView Frames and Bounds.
Additional References

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