Questions tagged [objective-c]
This tag should be used only on questions that are about Objective-C features or depend on code in the language. The tags [cocoa] and [cocoa-touch] should be used to ask about Apple's frameworks or classes. Use the related tags [ios] and [osx] for issues specific to those platforms.
367
questions
0
votes
0
answers
142
views
Generating an array texture in Metal (MacOS)
Provided is the code to create and populate the array textures in a game that uses tileable 32x32 textures for voxel faces. The idea is to have 3 different texture arrays for textures with different ...
- 725
3
votes
1
answer
181
views
A periodic implementation for C++ using Grand Central Dispatch
I have a C++ project which needs a few periodic timers. I have created a timer class for this project using Grand Central Dispatch.
I tried using boost::asio, but ...
- 33
2
votes
2
answers
195
views
Replace Western Arabic numerals with Persian digits
I've written and used this code in my apps whenever needed to convert any Western Arabic numerals into Eastern Arabic (or better say, Persian/Farsi) numerals in any Persian text.
It works fine as ...
- 121
1
vote
3
answers
73
views
How to use string constants correctly
I often get into the dilemma of how to use string constants, this is the way I use now:
...
- 133
4
votes
1
answer
812
views
Objective C String to JSON formatting
Quick disclaimer. I've programmed Java for years but this is the first Objective C I've ever written.
I've written some code which almost unfortunately works but frankly hurts my eyes with the number ...
2
votes
2
answers
459
views
Convert C to Swift
I trying to convert this C code for calculating distance from RSSI to Swift code. I try to do it by myself, but considering I'm beginner, I need help in how to do it.
Here is C code:
...
- 23
2
votes
1
answer
53
views
iOS Attributes in the data model
I am working on a product-related app where the data model for a product attribute feels too heavy. But I can't split it into several small data models because they are all about goods.
At present, ...
- 133
4
votes
2
answers
492
views
SIMD Mandelbrot calculation
I was messing around with GPU compute shaders the other day and created a Mandelbrot shader. Unfortunately, Metal doesn't support double-precision in compute shaders, so beyond a certain zoom level, I ...
- 11.6k
-2
votes
1
answer
163
views
3D vectors in Objective C
I am trying to learn Objective C and want to make sure I am following the proper practices/convention.
I would very much appreciate advice on what to change/improve
I also have some questions:
when ...
- 113
4
votes
2
answers
1k
views
Translating Objective-C use of static and +(void)initialize to Swift
I am converting an old Objective-C class into Swift. My actual question is at the very end after all of the code.
Here is a cut-down version of the Objective-C class:
DateInfo.h:
...
- 195
5
votes
1
answer
423
views
Point distance program written without a framework
I have been developing a cross-platform game based on open C libraries (mainly glfw) with a direct focus on Windows development. The beginning of my programming career taught me familiarity in ...
- 349
2
votes
1
answer
58
views
Checking user verification status
The User story is as follows:
Users are allowed to get "verified", so other users know they have passed a background check.
After tapping "get verified" button, or the "verification badge" ...
- 193
1
vote
0
answers
142
views
UICollectionViewCell's content layout misbehaves when UICollectionView scrolls to the top of the screen
UICollectionViewCell's content misbehaves ,
the layout animates,
when UICollectionView scrolls to the top of the screen.
I am asking here, because it looks like an apple's bug.
looks like squeezed ...
- 391
5
votes
1
answer
706
views
Creating directory within Application Support, and preventing iCloud backup
I'm using react native to build an iOS app, but have little to no experience in obj C or iOS development. The app I'm building has a bunch of content files that aren't user specific, will be ...
- 51
0
votes
2
answers
724
views
Multiple AFNetworking calls In a view controller
Multiple AFNetworking calls In a view controller.
The code is very wield.
I think , to negotiate with the server , and combine those into one url, instead of many urls.
...
- 391
0
votes
1
answer
236
views
Objective-C and AFNetworking
This is Objective-C and about Networking Request. Just set the AFNetWorking Manager and get method name from the method lists below (it is all Post request).
The way we take now is quite weird. If ...
- 391
0
votes
2
answers
536
views
Sychronous wrapper around UIApplication.openURL:options:completion:
I am deprecating iOS 9 on a project. One of the differences in the framework is that the openURL method has changed.
iOS 9
- (BOOL)openURL:(NSURL *)url;
iOS 10
...
- 101
0
votes
2
answers
251
views
Optimizing UITableViewCell with singleton property
In UITableViewCell class, I have two properties:
UINavigationController
...
- 391
4
votes
2
answers
684
views
A C++ wrapper for Apple CoreFoundation
The wrapper makes it easy to manage memory when using CoreFoundation objects. It aims to act like a simple shared_ptr.
Here is a usage example:
...
- 143
-1
votes
2
answers
117
views
Up/down arrow key commands
There are sources with these rules. I've listed the source too much, but I want to make it shorter and easier.
...
Nam
2
votes
1
answer
628
views
Objective C implementation of Swift's if-let
This [Objective-]C-preprocessor macro currently handles single-variable if-let-not-nil and if-let-is-type, but doesn't handle multiple simultaneous tests and doesn't handle ...
- 121
2
votes
1
answer
2k
views
Populate TableView with JSON data
I basically want to display JSON data in a TableView. The TableView always displays a List ...
- 431
6
votes
0
answers
2k
views
Iterate through all the photo library in iOS
This function is supposed to return a map of all unique local identifiers of images that are on the iPhone using the IOS Photos Framework.
(it is a map so nSnull or (any object can be mapped to it) ...
- 61
6
votes
2
answers
63
views
Checking for many alertable conditions before saving customer information
What's the best way to refactor this code? The method does a lot of checking before showing an alert. And the method is too long for my taste.
I'm thinking of extracting the checkers into their own ...
- 61
13
votes
1
answer
1k
views
Interview coding challenge for iOS Part 2 - the application in Objective-C and Swift
I recently interviewed with a company that needed a C/C++ programmer to work on the iOS side of the products. The job description indicated they needed someone with 4 years of Objective-C and iOS ...
- 23k
5
votes
1
answer
839
views
Interview Coding Challeng for iOS Part 1 - the Static Objective-C Library
I recently interviewed with a company that needed a C/C++ programmer to work on the iOS side
of the products. The job description indicated they needed someone with 4 years of Objective-C
and iOS ...
- 23k
3
votes
1
answer
376
views
Populating a UITableView with staff members using Firebase data
The end user will be able to see a list of staff that works at a church. The staff consists of 5 individuals with 5 different position titles (Minister, Pastor, etc.). This data is pulled from ...
- 31
2
votes
0
answers
207
views
Throttling several HTTP parallell requests
I'm using the above piece of code to do some HTTP calls in parallel. This loop is running inside a NSOperation. I must throttle a bit the requests (so I don't overload the server). The code is working ...
- 121
2
votes
1
answer
178
views
CommandLine StreamFormatTester
Using Chris Adamson's book Learning Core Audio I'm getting familiar with Core Audio for Mac/iOS. The code examples are 100% Objective-C. I'm trying to follow along using Swift 3.
This small piece of ...
user101048
1
vote
2
answers
3k
views
Checking that a 6-digit number is not repeated and not in sequence
Following is the objective C code snippet to check that the 6-digit number is not repeated and not in sequence/reverse-sequence. I have just printed the proper messages in ...
- 111
1
vote
0
answers
753
views
Mocking protocol with class/static functions in Swift
I am using one of the open-source Objective-C keychain wrappers to store data in iOS keychain.
For test cases, I have created protocol as:
...
- 424
-1
votes
2
answers
288
views
Initializing a big static array for a card-based iOS app
I have a card-based iOS app that uses a sizable static array of cards. Each card has several properties, mostly strings, numbers and boolean.
The first version of this app had 3-4 properties. The ...
- 197
3
votes
2
answers
109
views
Create a stack implementation that handles the multi thread scenario
MyStack.h
@interface MyStack : NSObject
- (id)pop;
- (void)pushObject:(id)object;
@end
MyStack.m
...
- 219
1
vote
1
answer
950
views
Controlling Drone with iOS Speech Recognition
I got a Parrot Mambo which comes with an SDK for creating your own app for controlling it.
I decided to use the iOS Speech Recognition library so I could use basic voice commands to control it. The ...
- 113
4
votes
1
answer
2k
views
1
vote
1
answer
84
views
Hard-coded iOS keyboard [closed]
I am starting to write code for a keyboard in iOS. It's pretty much hard-coded and I need suggestions on how I can make it more professional style and more efficient.
...
1
vote
1
answer
1k
views
Using a webservice with blocks and returning data via callback
I load some data from from my webservice via a method using blocks and callbacks.
From my ViewController I make a request to the data loading class and pass the ...
- 63
3
votes
1
answer
511
views
Storing global constants in app delegate or singleton
I am converting a non ARC projecs to ARC. I just found that after login in my old app, the data is stored in app delegate objects, like Home_DataArray, various ...
- 183
1
vote
0
answers
105
views
Functional-style Cocoa XML serializer and object mapper
I'm working on an XML-to-model-object serialization and deserialization library. There are three main design goals for the code:
It should parse XML into and serialize from Cocoa-native collection ...
- 115
0
votes
2
answers
2k
views
Convert NSInteger into NSString
This is my sample code to convert a integer into string.
Is it very costly to do the multiple loops of [NSMutableString stringWithFormat:..]?
I.e should I just use appendString and get the NSString ...
- 231
3
votes
0
answers
117
views
Sesame Street project
I started a tutorial online to get a little bit more knowledge about views. But after I did the basic I decided to finish the game.
The game is a little "I spy" game where the user tries to guess the ...
user110128
2
votes
2
answers
91
views
UIFont expansion
I wanted to expand the UIFont class in my application so I could use the large/medium/small letters concept.
I created but for some reason it looks weird. I ...
user110128
1
vote
1
answer
56
views
Sorting Timestamped Messages (iOS)
An app I'm building professionally includes rudimentary text messaging. It allows users to send from the phone, and it polls for new messages (I know, yikes. Push notifications are a future task) with ...
- 113
4
votes
1
answer
1k
views
NSURLSession load images on demand
I'm trying to come up with a system to populate my item images on demand, this is what I have so far. One obvious bug is that an item image could be downloaded multiple time since the ...
- 221
6
votes
3
answers
2k
views
Bubble Sort in Objective-C
Following is Objective-C method implementation I did for one of the most simplest sorting algorithms, Bubble Sort to sort an array of integers.
Note:- I have defined it as a static method in the ...
- 163
3
votes
2
answers
3k
views
UIButton Subclass - Overriding getters to return placeholder/default values
I'm in the process of converting a custom UIButton from Objective-C to Swift which has custom properties and default values for those properties:
MyButton.h
...
- 571
2
votes
2
answers
276
views
Method to check if TicTacToe board has a winner
I have a class called TicTacToeBoard that has a [3][3] array of TicTacToeBoardCells. Doc neck if board has a winner, I check if ...
- 231
4
votes
2
answers
94
views
Given a set of random strings, write a function that returns a set that groups all the anagrams together in objective-c
I would like to get feedback on the solution and a question regarding Big O.
I am first converting each character in the string into the array and that would be O(n) then i am sorting the array O(n ...
- 683
2
votes
2
answers
1k
views
Current user as a class-level property in Objective-C and Swift
I was recently tasked with architecting a user/profile object in Objective-C and wanted the ability to access a static instance from the class level, similar in style to the way Parse manages their ...
- 571
2
votes
1
answer
2k
views
Implementing a HashTable in Objective-C
I am trying to implement a hash table in Objective-C. I did some testing and the implementation seems to work. I am using an NSMutableArray to store linked lists ...
- 683