分类:IOS    发布时间:2012-7-11 10:34:13
    Sizes of iPhone UI Elements

    ElementSize (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 Bar44 pts
    Nav Bar Image /
    Toolbar Image
    up to 20 x 20 pts (transparent PNG)
    Tab Bar49 pts
    Tab Bar Iconup to 30 x 30 pts (transparent PNGs)
    Text Field31 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 height216 pts
    Landscape Keyboard height140 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