Model View Controller (MVC)

MVC is a design pattern. Set ApplicationProgramSeparate input, processing, and output To achieveCodeReuse . For example The iPad and iPhone can share the same M and C, but the V is different. ViewAndModelBetween No Direct communication.

 

OutletAnd view object inNIBComplete the connection in the window.ActionAnd view object events can be found inNIBWindow to complete the connection, if the view object is specified in the ControllerOutletYou can also use the code to bind view object events to user-defined functions.

[Btn1   Addtarget: Self   Action: @ selector (btnpressed :) forcontrolevents: uicontroleventtouchupinside]; -(Void) btnpressed :( ID) sender { Uibutton * BTN = (uibutton *) sender; // Start writing your own actions }