Objective-c is a highly dynamic message-based object-oriented language, superset of C, that is a primarily used for programming Apple's Mac OS X and iOS platforms.
-2
votes
0answers
21 views
Efficient text search library for Objective C [on hold]
I have a bunch of text/pdf files. I want to be able to search using keywords throughout all the files that i have at any point and list the files that contain the keywords.
Is there a library that ...
-3
votes
0answers
62 views
skills required to get a job in c [closed]
Hi I am a c developer and I have 2+year of experience in c. However, my job is to maintain a system which is written in c in the mainframe environment sometime back in late nineteen, so there is not ...
1
vote
1answer
109 views
Should I implement a function or a method?
Once in a while I encounter a C function in my colleagues' code.
Mostly it is in some helpful objective categories, and those functions are mostly an internal calculation of something or a ...
2
votes
1answer
84 views
Calling static method from instance of class
As a developer I am fan of static methods.
Recently I come across difference between OOP languages about this static methods.
All OOP language use static method to access any method without ...
-2
votes
0answers
25 views
How to localize array in Xcode5? [closed]
I'm trying to translate my project to another languages, however I'm stuck when localizing my arrays. For example:
tableData = [[NSArray alloc] initWithObjects:
@"Test1",
...
0
votes
1answer
52 views
Drawbacks to redefining method in precompiled header
I have a lot of calls to NSLog(...). I need to change all of these calls to CLSNSLog(...).
So I added this to my precompiled header (.pch):
#import <CrashlyticsFramework/Crashlytics.h>
#define ...
0
votes
0answers
33 views
Manage the persistence of entities on iOS in several places: CoreData on the device, iCloud and on a REST API
For the needs of a project, I would persist the datas contained in Core Data in several places depending on the state of the user.
If the user is logged to my API -> Persist the datas on my API.
...
1
vote
0answers
68 views
What are the bad points of using Core Data for iOS like an ORM
I just starting to use Core Data for my iOS app and I am thinking about how use Core Data for my needs.
What are the features of my app:
The user look for products proposed from a catalog.
The user ...
1
vote
2answers
80 views
Objective-C style: Do I implement factory methods or init methods?
I'm new to Objective-C programming, and creating various classes for an iOS application I'm working on.
When creating objects, it seems like many classes in the built-in frameworks use the "static ...
0
votes
1answer
67 views
Delegate method privately called from delegate itself?
One has established design patterns so ingrained in their brain, that when sometimes somebody does something unexpected, it is a revelation.
My colleague in an iOS project did call the delegate ...
1
vote
2answers
129 views
How can NSObject contain an NSString if NSString is an NSObject
How can NSObject contain an NSString if NSString is an NSObject
/* NSObject.h
Copyright (c) 1994-2012, Apple Inc. All rights reserved.
*/
(NSString *)description;
NSObject has a property named ...
0
votes
0answers
52 views
Difference between class clusters and abstract factory in cocoa
I have read that Obj-C class clusters are an implementation of the abstract factory.
Can anyone explain if there are any differences between the 2 as design patterns. I read somewhere that there are ...
0
votes
0answers
48 views
Use Objective-C protocols like Java interfaces [duplicate]
I'm a Java developer moving to Objective-C.
So far in Objective-C I've seen protocols used extensively to implement the delegate pattern, but I haven't seen then to add a layer of abstraction in the ...
0
votes
1answer
89 views
Significance of many-to-many relationships? [closed]
How important are to-many relationships in iOS programming? Do you often hold a list of pointers to objects in an array in your codes?
I don't think I fully understand the concept of to-many ...
0
votes
1answer
164 views
In objective C, where does the inheritance chain end? [closed]
In objective C, classes are objects, but what object owns the class objects?
I am trying to get as detailed an understanding of iOS programming as I can, and this question popped into my head, so I ...
1
vote
1answer
87 views
Is it bad practice to include two types of views in the same class?
In my app, I use a widget with a loading spinner to signify that a network request is waiting.
On failure, there will be another view which contains a failure message and a "Reload" button.
My ...
0
votes
2answers
152 views
How to remove redundant code that enables button. Or “if” statement
I got probably "micro optimization" problem.
I got "History number", "Next Number", "Reset" buttons, as well "label" for text.
Every time I click At "Next number" button I would like to show random ...
1
vote
4answers
170 views
Difference between the two enums
I came across an enum definition :-
typedef enum NSInteger {
kBorderTypeNone = 0,
kBorderTypeLeft = 1 << 0,
kBorderTypeRight = 1 << 1,
kBorderTypeTop = 1 << ...
0
votes
1answer
123 views
detect if a combination of string objects from an array matches against any commands
Please be patient and read my current scenario. My question is below.
My application takes in speech input and is successfully able to group words that match together to form either one word or a ...
3
votes
1answer
100 views
Testing: Should I wrap system notifications and send my own?
In the current Cocoa app I'm working on, I've got an object, RecordScheduler, which responds to two types of notifications, "day did pass" and "quicksaving interval did pass". In both cases, the ...
1
vote
1answer
170 views
Create an Objective-C category to route methods depending on a specified type
For one project, I needed to find a solution to avoid code like this:
if ([self.desiredColor isEqualToString:@"Red"])
[self constructRedMenu];
else if ([self.desiredColor ...
0
votes
0answers
55 views
How do I get fluid gesture motion in third party maps app on iOS?
There are a couple of apps on the App Store that use external map sources, for various reasons, to display map data. Some even have multiple sources for bike traffic and so on.
However some of them ...
0
votes
2answers
132 views
Is it acceptable to use C11 generic macros in Objective-C to box numbers?
I was getting tired of repeating types when writing things like this:
NSDictionary* d = @{@"so": [NSNumber numberWithInt:index]),
@"much": [NSNumber numberWithBool:accepted]),
...
-2
votes
3answers
131 views
Is explicit else needed in initialisers? [duplicate]
I have a custom designated initialiser like this:
- (id)initWithLocation:(CLLocation *)location
{
if (location == nil)
{
return nil;
}
self = [super init];
if (self)
...
-6
votes
3answers
587 views
Are Extension methods (C#) and categories (Objective-C) the same as traits? [closed]
According to:
Something similar to Objective-C categories in other languages?
Static extension methods in C# are basically the same thing as Objective-C categories, so I'm going to lump these two ...
5
votes
1answer
233 views
Can anyone explain to me what problem Core Data solves? [closed]
Core Data seems to add a needless layer of complexity. If you want to save data created natively by the user in an app why not just use an object and then write the data all to SQLite or back to a ...
0
votes
4answers
1k views
Should I learn Objective-C if I don't want to make iOS applications? [closed]
As a Windows programmer in C/C++/Java languages, is there any other purpose for Objective-C other than developing on Cocoa and Mac iOS products?
Would there be any use for a Windows programmer to ...
1
vote
0answers
105 views
Designing object oriented programming
Basically, I want to make api calls using an SDK I am writing.
I have the following classes:
Car
CarData (stores input values needed to create a car like model, make, etc)
Basically to create a ...
1
vote
0answers
86 views
Objective-C Lesson in Class Design
I have the following classes:
Teacher
Student
Class (like a school class)
They all extend from KObject that has the following code:
- initWithKey
- send
- processKey
Teacher, Student ...
1
vote
1answer
166 views
Custom animation iOS
I have seen animation, and i can't figure out how to do something like in this video(youtube). I want to discuss how it's made. I don't think that they're using sprites.
I have one idea how to do ...
0
votes
2answers
663 views
Basic Objective-C Questions
I'm new to objective C, I'm following "Objective C 5th Edition Stephen Kochan and I don't have anyone to ask my doubts to. I'm confused with this question:
Q. Is it necessary to use "-" or "+" before ...
0
votes
1answer
271 views
Design pattern for locking asynchronous operations in Objective-C
I'm writing my first Objective-C Class. It's responsible for interaction with an HTTP SSO authentication service.
The process requires multiple HTTP transactions in order to complete. The Class acts ...
2
votes
1answer
387 views
When to use embedded script language?
I already read some post about the why use embedded script language but I want to ask when to use it.
I have implemented an Objective-C / Javascript binding framework which allow me to write ...
0
votes
6answers
715 views
What are the reasons to create UIView subclass?
I've noticed that there are a lot of UIView subclasses in my legacy project. Mostly the only reason of such a subclass is to split bigger view into custom subviews and provide layout for its subviews ...
7
votes
3answers
262 views
Where should I put methods that make an Http Request to get data from a web service in iOS development?
I have a Model Car in my iOS application where it's parameters like name, year, value etc are fetched from a web service in order to fill a list with cars data.
Where should I put the method that ...
3
votes
3answers
298 views
In Objective C, what English words can I conceptually associate to the symbols?
I'm learning Objective C (from a C# background) and am having difficulty understanding the unusual method signatures and am looking for a shortcut to make the learning curve less steep.
When reading ...
2
votes
2answers
256 views
Is state pattern a good solution for implementing UI changes for Landscape and Portrait modes?
For our iOS app, a lot of complicated UI logic depends on the interface orientation of the ViewController. This conditional logic is present in a lot of places.
Can it be segregated into different ...
0
votes
1answer
237 views
Apple Dispatch Queue vs Threads
I've heard a lot about apple's famous dispatch queues and the GCD but today was the first time I decided to understand exactly what is going on, so I started reading Concurrency Programming Guide and ...
0
votes
4answers
314 views
What can I do without the iPhone SDK and Xcode? [closed]
I want to develop an iPhone application, I do not have Xcode nor the iPhone SDK (nor a macbook but I plan to buy one). What could be done without those products?
Edit: I intend to release it on ...
2
votes
4answers
297 views
What is the proper way to store an object with many attributes in Objective-C?
I have an object that I am downloading over HTTP, that has approximately 50 attributes. What is the proper way to store this information in Objective-C? Should I have an NSObject with a property for ...
23
votes
3answers
1k views
Is it considered a bad practice to add logic in a property setter?
I jumped in to a project and I see that the other developers are adding a lot of logic in the setters of synthesized properties.
I understand how this works, but I think that it makes it hard to ...
3
votes
3answers
435 views
Why use protocol, not call the method directly?
I was asked this question in an interview. For eg: UITableviewDelegate protocol has CellForRowAtIndexpath. Why make it a delegate method in a protocol not a method in the UITableView class and call it ...
0
votes
1answer
276 views
Which is faster NSDictionaries or object properties?
If I abandon creating model objects which I only use to pass information and use NSDictionaries instead and have constant for keys in the same place where I am using the model, then does it have any ...
1
vote
2answers
400 views
Why do we use networking libraries instead of plain NSURLRequests and NSURLConnection ?
in iOS development, I have often seen people creating a networking module to interact with their APIs.
This module generally sits on top of a networking framework like MKNetWorkKit or AFNetWorking.
...
0
votes
1answer
149 views
Truth condition testing with BOOL
BOOL myBool;
myBool = YES;
...
if (myBool) {
doFoo();
}
I have read that because there are instances where the above does not actually call the doFoo() function, it is best to instead always test ...
1
vote
2answers
192 views
PayPal proof of payment - is there a need to store it at our server?
I am developing an iPhone app, which I am integrating with PayPal.
I did it successfully using PayPal library. I am testing it on sandbox mode. When I transfer money from one account to the other ...
0
votes
1answer
140 views
NSException in init when having a custom designated initialiser?
I have a custom View Controller that is a subclass of UIViewController that requires a data object to be set up properly. Without this object, showing the VC doesn't make any sense.
So I created a ...
4
votes
1answer
671 views
Getting rid of Massive View Controller in iOS?
I had a discussion with my colleague about the following problem.
We have an application where we need filtering functionality. On any main screen within the upper navigation bar, there is a button ...
2
votes
2answers
1k views
Programming against a protocol in Objective-C
I stumbled accross the SOLID principles. There is one burning question. Should I always use protocols? I never saw someone using them in the way that a Java developer would use them.
I tried it in a ...
2
votes
4answers
522 views
Is Objective C a reasonable way to learn C?
I want to learn C but I tend to learn best when I have a project to work on. I've never done iPhone development, so I'm hoping to kill two birds with one stone. Will learning objective c also teach me ...
