Space size frequently used in IOS

Element Size (in points) Window (including status bar) 320x480 ptsStatus Bar (How to hide the status bar) 20 ptsView inside window (visible status bar) 320x460 Navigation Bar 44 ptsnail V Bar Image/Toolbar Image up to 20x20 pts (transparent PNG) Tab Bar 49 ptsTab Bar Icon up to 30x30 pts (transparent PNGs) text Field 31 ptsHeight of a view inside a navigation bar 416 ptsHeight of a view inside a tab bar 411 ptsHeight of a view inside a navbar and atab bar 367 ptsPortrait Keyboard height 216 ptsLandscape Keyboard height 140 ptsPointsvs. pixelsThe iPhone 4 introduced a high resolution display with twice thepixels of previous iPhones. however you don't have to modifyyour code tosupport high-res displays; the coordinate system goes by pointsrather than pixels, and the dimensi ***** in points of the screenand all UI elements remain the same. iOS 4 supports high resolution displays (like the iPhone 4 display) viathe scale propertyon UIScreen, UIView, UIImage, and CALayer classes. if the object isdisplaying 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 @ 2xversi ***** of the images in your project. seethe checklist for updating to iOS4 or Apple documentationfor Supporting High Resolution Screens formore info. adjusting SizesClick here to see how toadjust View Frames and Bounds. additional ReferencesApple Documentation: Points. pixelsAppleDocumentation: UIBarButtonItem ClassReference says "Typically, the size of atoolbar and navigation bar image is 20x20 points. "AppleDocumentation: UITabBarItem ClassReference says" The size of an tab bar imageis typically 30x30 points."