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I have a situation where I have to take input from the user using multiple views (like Personal Information -> Professional Information -> Process Completed).
I was wondering, how can I build a class like UIImagePickerController, which takes input from user and returns the data to parent class? Note that the view is also handled by this class.
This is a perfect example of a delegate pattern.
You create the object, assign a delegate. The object allows user interaction. When the user closes the object view, the object tells the delegate ‘here’s the chosen value.’
This is a standard pattern in Cocoa & Objective-C and you should learn to use it, as you run across it very frequently (UITableView, for example, or UIImagePickerView both use the delegate pattern).