UIKit

UIKit is the UI framework in the IPhoneRuntime, the equivalent of AppKit for traditional OS X apps. Most of the classes are more or less equivalent to their NS- prefixed AppKit counterparts.

Warning: The information listed here may be incomplete, incorrect, or extremely misleading. If in doubt, wait until the official SDK is released.

Useful classes:

• UIHardware: information about the device
• UIApplication: main application class

• UIWindow
• UIResponder
• UIView
• UIControl
• UIImage
• UIImageView

• UINavigationBar: That swank little bar at the top with a button or two
• UIButtonBar
• UITextView
• UITextLabel
• UITextField
• UIKeyboard: The iPhone's keyboard
• UIFontChooser
• UISegmentedControl
• UISliderControl
• UISwitchControl: On/Off switch
• UIPickerView
• UIPushButton
• UIAlertSheet
• UITransitionView
• UIProgressHUD

• UITable: iPhone's list UI. Related classes:

• UITableColumn
• UITableCell
• UIImageAndTextTableCell
• UIPreferencesTable
• UIPreferencesTableCell
• UISectionList

• UIAnimation

For UIKit tips and tricks, check out slerp: http://phonedev.tumblr.com