| 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 |
原文：http://www.cnblogs.com/memorecool/p/4060099.html