A late-binding, message-based, object-oriented language that is a strict superset of C and is primarily used for programming on Apple's Mac OS X and iOS platforms. Objective-C can also be used on other platforms that support gcc or clang.

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30 views

Generic class for displaying UIAlertView / UIAlertController on iOS

To address backwards compatibility for UIAlertView, I have come up with an interface that would seem to work for both iOS ...
4
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1answer
31 views

Dirty but Efficient Texture Atlas in Spritekit

I have spent quite a bit of time trying to optimize the performance of my 2D mining game. After a lot of research, experimentation, and testing, I finally found something very interesting that ...
5
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1answer
77 views

My iPod is slower than my iPad

Many of the variables in my 2D mining game were declared as constants like so: DWConstants.h ...
2
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1answer
29 views

Non-concurrent write creates bottleneck

I have some efficient methods that recursively creates a tree structure (NSTreeNode) of by looping recursively over a directory structure. The result is displayed ...
5
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0answers
39 views

Multithreading in a 2D Mining Game

I have implemented some basic multithreading in my 2D mining game that I asked about in a previous question. The first part is working out great (creating the initial object instances in the ...
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5answers
84 views

Turning JSON objects into custom NSObjects

Was advised to post this question here after posting to Stack Overflow. I'm pre-populating a UITableView app with data using a local JSON file. The JSON itself is very simple: ...
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0answers
20 views

Is this an acceptable way to map JSON objects to custom NSObjects? [duplicate]

I'm pre-populating a UITableView app with data using a local JSON file. The JSON itself is very simple: ...
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1answer
71 views

Chunk Loader for 2D Mining Game

I've spent a couple days on my latest project, and I believe that I have achieved a sufficient level of efficiency to post it here for review. The idea of the game is to mine out an "infinite" world ...
3
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3answers
106 views

Speeding up storage of about 220000 values in Core Data

I use this code on the app's first run to save about 220000 values into core data. The file Navaids.txt has about 200000 and Waypoints.txt has about 20000 lines, where I get data from each line and ...
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1answer
50 views

Reading a property on a main thread that is set on a background thread

I am currently handling some setup of an object on a background thread (I am using a concurrent queue within the following initWithDocumentFileURL method): ...
5
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0answers
41 views

Modularizing a Game Scene in Sprite Kit

I am trying to modularize the main SKScene of my strategy game. I am not sure that my approach is correct so I would love to get a review of the following code. The SKScene adds the top level node of ...
3
votes
0answers
88 views

Core Data model for test-taking iOS app

I'm building an iOS app for test-taking and I want to be sure of my model before proceeding. I found this post very helpful and tried to implement a simplified version for Core Data. Here are some ...
4
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1answer
73 views

Reading and Parsing JSON from a Game Server

This is my naive (but currently working) attempt at reading JSON commands from a Java game server in Objective-C. I am afraid I might be doing something wrong, so hopefully this question will be a ...
3
votes
3answers
308 views

Determine if a string has all unique characters

I'm practicing algorithms (for future interviews) while learning about Big O notation and was wondering if there's a faster or more optimal way of writing an algorithm to see if a string has all ...
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2answers
115 views

Repurposing UITableView infinite scroll configuration/properties

Had my first go at implementing infinite scrolling for UITableView's in my iOS app last night, and I noticed I ended up copying/pasting quite a bit of boilerplate from one VC to the next (if I wanted ...
3
votes
1answer
50 views

Factory Class for Game World

The world in my strategy game is comprised of a number of towers. At the start of the game, only one tower is generated, and when the player discovers new towers they are created and added to the ...
3
votes
1answer
53 views

Complex Conditionals in a Strategy Game

I have been looking at this method for a long time and I have finally refactored it into something that I believe is much more readable. I am not totally happy with it though so I would like to get ...
6
votes
2answers
197 views

Array from file

I have this code which is performed each time I click the 'show polygons' button. The problem is that it takes a few seconds to finish running through the code before actually drawing the polygons + ...
10
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4answers
486 views

Prime Factorization

I'm doing an Objective-C project and I need to do some prime factorization and so I came up with the following algorithm which is 99% C, except for the array part which was easiest to implement in ...
0
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1answer
61 views

Making a webService file smaller [closed]

I'm developing an iOS app, and I have a file, WebService.m, that is now 2300 lines long. My file contains all the web service calls on my app, with their parsing if successful, like: ...
3
votes
2answers
96 views

Keeping UI code DRY in iOS projects

I've subclassed UI button and used it in my View Controller's viewDidLoad method, like so: ...
3
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1answer
74 views

Loop Animation on several UIButton's NSLayoutConstraint

I took the belated plunge to look at Autolayout. Normally I'd animate based on a UIView's frame (i.e I'd have used the following): ...
3
votes
2answers
86 views

Thread-safe, in-memory LRU cache with a maximum item count of 10

I'm attempting to master LRU Caching. It must be thread safe, and it should preferably perform as well as web image-cache, (avg ~1MB). Please take a look to see if there's anything wrong, amiss, ...
4
votes
2answers
71 views

Should this Method be in TableViewCell or ViewController?

I have a custom tableview cell for displaying different foods, with a star next to each name. If the food has been favorited (i.e., it exists in the database), the star is filled in, otherwise it is ...
4
votes
1answer
41 views

Model class for networking that uses notifications

I just finished a model class that represents an Instagram Networking client for my iOS app. I am specifically looking for a review of my use of static constants. These are strings that represent ...
6
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1answer
106 views

Clustering markers on Google map on zoom

I have a method that is getting called when someone zooms camera on the map (Google map). I recalculate the positions of markers of map and the code is clunky and not effective. I iterate over arrays ...
5
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2answers
155 views

Directory listing model

I need a class to read and store directory structure. This is my first step in Objective C so I ask to you to say what you think. Header file: ...
11
votes
3answers
250 views

Using a Dictionary to retrieve BOOL values

I have some values pulled from a web service giving me a bool value for a key. I did it this way, but feel like it is repeating without need. How can I refactor this? Please note that the key on ...
6
votes
1answer
81 views

API for SQLConnect Library

I've designed a library for connecting Objective-C (and now Swift) apps to Microsoft SQL Server 2005+. (I believe there are other databases it works with, but I've only tested with MSSQL.) The ...
3
votes
2answers
43 views

Further refactored Model class that represents a calculator

Here is my Model class's new header file: ...
4
votes
3answers
75 views

Model class representing a calculator

I have a simple Model class that represents a calculator. Here is it's header file: ...
4
votes
1answer
67 views

Downloading and Loading Remote Game Assets

On advice from an answer to my previous question, I have written some code that will allow my game balance properties to be loaded from a remote server. Right now I am just hosting the raw property ...
3
votes
1answer
51 views

Game Balance and where to store Variables

I have been thinking about this aspect of my game for a little while, and I have come up with the following solution. I am sure that there are problems with the way I have implemented it so any kind ...
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3answers
183 views

iOS coding style

I am new to iOS development. I wrote this code, but the company said that this is bad architecture and is not acceptable. I want to improve this code. ...
4
votes
1answer
70 views

Game Achievements without Singleton

This is my first time implementing achievements in a game so I could definitely use some feedback on what I have done here. I have heard about singleton approaches to this problem, but I did not feel ...
2
votes
1answer
67 views

Find the nearest (small) number x where x can be represented by sum of cubes

I recently came across a problem where a number \$x\$ is given and I have to find \$y\$: \$y < x > 1\$ \$y\$ can be expressed as \$a^3 + b^3\$ (more than one combination) Example: If 4105 ...
7
votes
1answer
110 views

Loading and Using Lua Scripts

I have been experimenting with integrating Lua into Objective-C. I have tried to do the bare minimum to get Lua to compute values and return them. I did not want to use any external libraries so I ...
6
votes
2answers
83 views

Convert numbers into a textual form

So this was originally inspired by @nhgrif's Int extension for translating integer to plain English, however the code is mainly a port of @rolfl's Converting a number to the text representation; ...
7
votes
3answers
171 views

Trading Card Game Prototype in OOP

So I am sure there are better ways to set this up, but I wanted to see how something like this would work in Objective-C, so I went ahead and built a prototype of a Tradeable Card Game. I've never ...
12
votes
3answers
307 views

SQLConnect - A library for connecting Objective-C/Swift applications to Microsoft SQL Server

The complete SQLConnect library can be found here. The file from which the following method belongs can be found here. At some point I may or may not open questions for reviewing other aspects of ...
7
votes
2answers
89 views

Ability Cards that trigger Game logic

I want to ask this question because I have been thinking about it for a while and I haven't discovered a solution that I am very happy with. When coding games, I've frequently run into the situation ...
4
votes
2answers
108 views

Class refactoring including changing instance methods to class methods and adding singletons

My main goal with this refactor was to change instance methods that should have been class methods in the first place into class methods. My secondary goal was to add singletons to these classes ...
7
votes
1answer
73 views

AI Governor to Play a Strategy Game

I had the idea the other day to implement an artificial intelligence that could play my strategy game. This could be useful in a variety of different ways. For example, the player could "lose ...
6
votes
1answer
93 views

Objective-C code clean up

I am tasked with cleaning up someone else Objective-C code, and will admit, it is not my language of choice. I am not sure if this is a valid question but was hoping someone could double check my ...
10
votes
4answers
904 views

Decision Table for the Movement AI in a Game

I posted a question on Stack Overflow about how to implement Decision Tables in Objective-C after reading about them for the first time in chapter 18 of Code Complete. Nobody provided an answer, so ...
12
votes
3answers
353 views

A flashing ! exclamation ! point ! bar

I have this Objective-C code for use in an iOS app that makes a 'bar' on the screen, with a red exclamation mark that flashes in it at random places. Here's what it looks like: Header file: ...
1
vote
2answers
178 views

Passing Row Index of TableViewCell (custom) to another view controller [closed]

I have been trying to achieve the below requirements to get them working. Am I doing it the right way? We have a table with customised Cell (say: ...
3
votes
3answers
75 views

Working with Classes (inheriting), @ properties and Initialization

I'm working on this Objective C programming assignment I found online. I'm not sure if I have met all the requirements, especially part C. Any help or suggestion will be appreciated. Part 6 ...
5
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2answers
91 views

Parsing Websites and transferring Data between Objects

I have a DiningHall class that has the 3 properties: openingTime, closingTime, and ...
3
votes
1answer
53 views

Revised worker movement AI for strategy game

A while ago I posted this question about worker AI and Job Queues for a strategy game. I have posted other questions about the Job Queue, and now I would like to post this revised question about ...