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• Check if Integer is Positive or Negative - Objective C

  - by Kevin

  Hello, How can I tell in objective-c coding if an integer is positive or negative. I'm doing this so that I can write an "if" statement stating that if this integer is positive then do this, and if its negative do this. Thanks, Kevin

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• Do I need getters and setters if i'm depending on garbage collection in objective-c

  - by Chris

  New to Cocoa and Objective-c. Do I need getters and setters if I'm depending on garbage collection? For example is it safe to just modify instance variables directly without the dot syntax? And in the dealloc method can I sent them to nil instead of release (or do I even have to release them)?

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• Howto articles for iPhone development, Objective C

  - by AskAboutGadgets

  I am looking for an introduction into developing for the iPhone. Any recommendation? I do not speak Objective-C either, so tutorials on that would not hurt either.

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• Unix System Call in Objective-C

  - by Biranchi

  Hi all, Is it possible to make system call in Objective-C? I have the following code: if (!system("ls -l")) { NSLog(@"Successfully executed"); } else { NSLog(@"Error while executing the command"); } How to get the output? Thanks

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• Modulo operator in Objective-C returns the wrong result

  - by Greg Maletic

  I'm a little freaked out by the results I'm getting when I do modulo arithmetic in Objective-C. -1 % 3 is coming out to be -1, which isn't the right answer: according to my understanding, it should be 2. -2 % 3 is coming out to -2, which also isn't right: it should be 1. Is there another method I should be using besides the % operator to get the correct result?

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• What does the "*" mean in Objective C?

  - by Tattat

  Sometimes I encounter code that has *, sometimes **. Can anyone explain what they mean in Objective C? (I used to be a Java programmer, with experience in C/C++.)

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• adding zeros in objective-c string formats

  - by Chris

  Hello- Quick question: I am trying to fill in empty spaces with a specific number of zeroes in an NSString stringWithFormat formatting string. For example, I want: @"The number is %d", 5 // I want this to output 'the number is 05' @"the number is %d", 10 // I want this to output 'the number is 10' I know how to do this in Java, but I cant seem to find the same function in objective-c. Any help would be great.

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• iPhone Objective-C Simplest Way to get a stock quote

  - by norskben

  Hi guys Im wondering what is the simplest way to get the current price of a stock from say yahoo finance (or similar) in objective-C For the iPhone SDK. Simple is the key, I am looking for current price, and days movement. I havent had much luck finding an iPhone code example or library. regards

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• how did you get into objective C?

  - by Lucas Della Bella

  how did you get into objective C? I'm trying to learn but every book I pick up is crap, and I can't find any videos (I'm a visual learner too)

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• How to Call drawRect programmatically in objective c

  - by Sijo

  How to Call drawRect programmatically in objective c ? I want to call drawrect method of a view in my UItabbarcontroller. How i can do this ? Thanks in advance..

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• objective c - delegate and events

  - by amir

  Hello all, I am looking for good example code for using delegate and events in objective c? i am familiar with delegate and events in C#. so if someone can help me with few lines of code it will be very helpful.

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• Objective-C Framework for registering an app?

  - by Adrian Sarli

  Does anyone know of an Objective-C framework that takes care of registering an app? I'm interested in the GUI/30-day trial side more than the actual verifying of serial numbers.

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• objective-c determine if parameter is an object

  - by Broch Pirate

  in Objective-c I have this function prototype: -(NSString*)formatSQL:(NSString*) sql, ... I may pass to this function any type of parameters: NSString, NSNumber, integer, float How can I determine in the function if a parameter is an object (NSString..) or a primitive (integer...)? thanks BrochPirate

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• Is there an objective-C library to talk with a CAS server

  - by Jason

  Is there a library already created to talk with an CAS server via objective-c? I know there are many supported clients but have yet to find anything I can use on the iPhone.

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• Referencing DLLs for Objective-C (GNUStep on Windows)

  - by kim3er

  Hi, How do you reference DLLs from Objective-C? I use GNUStep Make files on Windows. RIch

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• How to quickly search an array of objects in Objective-C

  - by randombits

  Is there a way in Objective-C to search an array of objects by the contained object's properties if the properties are of type string? For instance, I have an NSArray of Person objects. Person has two properties, NSString *firstName and NSString *lastName. What's the best way to search through the array to find everyone who matches 'Ken' anywhere in the firstName OR lastName properties?

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• Objective C -std=c99 usage

  - by Andy White

  Is there any reason why you shouldn't use the "-std=c99" flag for compiling Objective-C programs on Mac? The one feature in C99 that I really like is the ability to declare variables anywhere in code, rather than just at the top of methods, but does this flag causes any problems or create incompatibilities for iPhone or Cocoa apps?

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• [Cappuccino/Objective-J] CPView tiled background?

  - by spk

  Is there a way to tile an image in objective-j on a CPView? something along the lines of: [CPImage alloc] initWithPatternImage:@"Resources/grid.png" size:CGSizeMake(5.0, 5.0)] Thanks guys ;)

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• Regex solution for Objective-C

  - by rjstelling

  What is the best method for using Regular Expressions within Objective-C? There seems to be some open source project that provide regex support, can any one recommend one? Also I looked at NSPredicate, can anyone suggest any regex examples? Background: I want use regex mainly for validation, IP's, email addresses, internal ID's etc

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• hash of array in objective-c, how?

  - by Horace Ho

  How is a hash of integer array can be represented in objective-c? Here is the ruby hash as an example: hi_scores = { "John" => [1, 1000], "Mary" => [2, 8000], "Bob" => [5, 2000] } such that can be accessed by: puts hi_scores["Mary"][1] => 8000 hopefully easy to serialize too. Thanks!

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• Object declaration in Objective-C

  - by Sahat

  Is there any difference in declaring objects in Objective-C between (1) and (2), besides the style and personal preference? (1) One-line declaration, allocation, initialization. Student *myStudent = [[Student alloc] init]; (2) Multi-line declaration, allocation, initialization. Student *myStudent; myStudent = [Student alloc]; myStudent = [myStudent init];

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• Use of * in Objective C Syntax

  - by user263097

  I'm struggling a bit with some objective c syntax. Can someone please elaborate on the usage of * in the following instance method. - (IBAction)sliderChanged:(id)sender{ UISlider *slider = (UISlider *)sender; } I realize that we are creating a variable typed as UISlider and then setting it to sender once it is cast as a UISlider. However, I don't understand what the * are for and why UISlider slider = (UISlider)sender; won't work.

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• Is there a shareware making app for Objective-C Desktop Mac apps

  - by Doron Katz

  Hi guys, I was wondering if there were any libraries out there to allow Mac desktop developers on Objective-C to create shareware applications, similar to sharify for Air. Perhaps through use of Paypal etc.

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• Objective C: Initalizing static variable with static method call

  - by adranale

  The Compiler claims an error saying: "initializer element is not constant", when I try to initialize a static variable inside a method with a call to a static method (with + in its definition). Anyway I can tell him that this method always returns the same value. I know this is not the same as static method, but there seems to be no constant methods in Objective-C (other than macros which won't work here because I am calling UI_USER_INTERFACE_IDIOM() from inside the method).

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• Benchmarking a particular method in Objective-C

  - by Jasconius

  I have a critical method in an Objective-C application that I need to optimize as much as possible. I first need to take some easy benchmarks on this one single method so I can compare my progress as I optimize. What is the easiest way to track the execution time of a given method in, say, milliseconds, and print that to console.

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