Question

I’m developing an iPhone app. I need to create a Quiz application that has different Question views embedded in it (see my similar question).

Different types of Question will have different behavior, so I plan to create a controller class for each type of Question. The MultipleChoiceQuestionController would set up a question and 3-4 buttons for the user to select an answer. Similarly, the IdentifyPictureQuestionController would load an image and present a text box to the user.

However, the docs say that a UIViewController should only be used for views that take up the entire application window. How else can I create a class to manage events in my subviews?

Thanks,

Answer 1

You can handle the events on the view itself, or your view controller could have a delegate class that changes for different types of question. That delegate would process the different input, and react in a different way to user touches.

Here’s some code with the idea.

// In QuestionViewControllerDelegateProtocol.h
@protocol QuestionViewControllerDelegateProtocol

// Define the methods you want here
- (void)touchesBegan;
- (void)touchesEnded;
- (void)questionLoaded;

@end

// In QuestionViewController.h
@interface QuestionViewController {
    id<QuestionViewControllerDelegateProtocol> delegate;
}

@end

// In QuestionViewController.m
@implementation QuestionViewController

- (void)viewDidLoad:(BOOL)animated {
     [delegate questionLoaded];
}

- (void)touchesBegan {
     // Some processing logic.
     [delegate touchesBegan];
}

@end