iOS常用控件尺寸大集合

元素控件尺寸（pts）Window（含状态栏）320 x 480Status Bar的高度20Navigation Bar的高度44含Prompt的Navigation Bar的高度74Navigation Bar的图标20×20（透明的png）Tool Bar的高度44Tool Bar的图标20×20（透明的png）Tab Bar的高度49Tab Bar的图标30×30（透明的png）竖直时键盘的高度216、252（iOS 5+的中文键盘）水平时键盘的高度162、198（iOS 5+的中文键盘）

iPhone App Icon：
图标名称尺寸用途是否必需Icon.png57×57App Store和iPhone、iPod touch桌面显示是[e-mail]114×114Icon.png的高清模式是Icon-Small.png29×29“设置”应用和Soptlight搜索否[e-mail]58×58Icon-Small.png的高清模式否

iPad App Icon：

图标名称尺寸用途是否必需Icon-72.png72×72iPad桌面显示是Icon-50.png50×50Spotlight搜索否Icon-29.png29×29“设置”应用否

iPhone、iPad通用App Icon：

图标名称尺寸用途是否必需Icon.png57×57App Store和iPhone、iPod touch桌面显示是Icon-72.png72×72iPad桌面显示是Icon-50.png50×50iPad的Soptlight搜索否Icon-29.png29×29“设置”应用和iPhone、iPod touch的Soptlight搜索否

延伸阅读：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.

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