I have seen apps in App Store that have really attractive UI.When i make an app i use only the default set of control provided by Interface Builder and my app(even though good in functionality)does not have a UI that can attract people.Is there any ref or sample code that teaches us how to design good UIs for iPhone apps.
Also I want to place a control in my App similar to one in iPhone(i.e the way we unlock the iPhone by sliding a button and the iPhone gets unlocked)how can we do this.Please provide some ref or sample code for it.
There is no simples step by step description of how to make really attractive ui’s. It takes both time, skill and a sense of esthetics. However, a good starting point is to thoroughly read your way through apples iphone human interface guidelines:
http://developer.apple.com/iphone/library/documentation/userexperience/conceptual/mobilehig/Introduction/Introduction.html