在cocoachina上看到iPhone开发中经常用到的控件尺寸大集合这篇文章，因为经常用到这些尺寸，在这里做一下记录。
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