iPhone Interface Sizes

Where can I get system size of UI elements in iOS?

For example,

• UIButton corner radius,
• UIWindow size (I know it's 320pt, but is there a constant for it?),
• System font size,
• Navigation bar height,
• Tab bar height,
• Status bar height, etc.

D开发者_开发知识库o they have predefined constants or similar?

UIButton corner radius

I don't think there's an API for that.

UIWindow size (I know it's 320pt, but is there a constant for it?)

You could get this via [[UIScreen mainScreen] bounds].

System font size

UIFont has class methods for getting standard font sizes: labelFontSize, buttonFontSize, smallSystemFontSize and systemFontSize are available.

Navigation bar height, Tab bar height,

The UIView instance method sizeThatFits: could be used to get the default sizes for those.

Status bar height

You can get this implicitly by subtracting the height of [[UIScreen mainScreen] bounds] from [[UIScreen mainScreen] applicationFrame].

You can find the common UIElement sizes here: http://www.idev101.com/code/User_Interface/sizes.html