I have XIBs that contain custom objects, one of these is actually a class cluster whose -init method always returns the same singleton object. Basica ...
I have XIBs that contain custom objects, one of these is actually a class cluster whose -init method always returns the same singleton object. Basica ...
Question How do we hide private class when using it in Objective-C? For example, as described below PrivateFilter is the class I want to hide. Custo ...
I have the following code: And I expect both output are NSArray, however the output turns out to be: Then I create a test class called CAJTestCl ...
I need to encode additional data to a NSString (Long story, please don't ask why...) I've subclassed NSString using the method outlined here: When I ...
I would like to create a "multi-level" class cluster such that each "concrete" class could return a more specific instance when certain criteria are m ...
I am simply writing the following code for testing purpose: I am getting the following error: If i write the following code same thing happen ...
This is a relatively common design pattern: https://stackoverflow.com/a/17015041/743957 It allows you to return a subclass from your init calls. I' ...
I'm trying to create a class cluster as subclass of UIViewController to accomplish some points: 1. Different behavior of the ViewController depending ...
I'm trying to create a class cluster for a UITableViewDatasource. My interface looks like this: Internally, the abstract class looks like this: ...
Parsing through this document on class clusters, NSNumber implements initWithChar: in roughly the following manner: Similarly, you could use this p ...
Setup: I have data coming in via JSON. Using NSJSONSerialization I convert the JSON to an object. A number value in JSON comes in Objective-C as s ...
I want to implement a class cluster (with ARC), but clang gets in the way. Here is one init method that returns a concrete instance of another class - ...
So I just got asked this at an interview today and after some googling am still unable to figure out the answer (in fact I couldn't even find any code ...
I am trying to subclass NSNotification. Apple's docs for NSNotificationstate the following: NSNotification is a class cluster with no instance va ...
Ordinarily, being a good Cocoa citizen, I write my initializers returning type id (i.e. pointer to generic object) for easier subclassing later (thoug ...
I am using WSDL2OBJC for an OS X project. Part of the code generated by WSDL2OBJC adds a category to NSNumber. While I'm using the code I attempt to c ...
I am trying to subclass NSArray, but it crashes the app when trying to access the count method. I know that NSArray is a class cluster. But what d ...
My iPhone app has an abstract class WorkingView. It is a subclass of UIView. WorkingView will in turn have a bunch of concrete subclasses. Two of thos ...
Why am I getting an "out of scope" error whenever I try to access the "url" variable in this loop? The class of very item in the "self.winnerImageU ...
I was reading that NSArray is just such a thing. Sounds heavy. I have 7 really fat books here on my desk about Objective-C, Cocoa and C. None of them ...