Uiview

#UIView

• the UIView class defines a rectangular area on the screen and the interfaces for managing the content in that area.
• at runtime a view object handles the rendering of any content in its area and also handles any interactions with that content.
• UIView itself has the capability of filling itself with a background color. More sophisticated content can be presented by subclassing UIView and implementing the necessary drawing and event handling code yourself.

##common methods and properties

• frame - the frame rectangle which describes the view's location and size in its superview's coordinate system. takes a CGRect as an operator. You can use this rectangle during layout operations to size and position the view.
• bounds - this property describes the view's location and size in its own coordinate system.