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• Simple libxml2 HTML parsing example, using Objective-c, Xcode, and HTMLparser.h

  - by Stu

  Please can somebody show me a simple example of parsing some HTML using libxml. #import <libxml2/libxml/HTMLparser.h> NSString *html = @"<ul><li><input type=\"image\" name=\"input1\" value=\"string1value\" /></li><li><input type=\"image\" name=\"input2\" value=\"string2value\"…

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• Parsing nested JSON objects with JSON Framework for Objective-C

  - by Sheehan Alam

  I have the following JSON object: { "response": { "status": 200 }, "messages": [ { "message": { "user": "value" "pass": "value", "url": "value" } ] } } I am using JSON-Framework (also tried JSON Touch) to parse through this and create a dictionary.…

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• Compress/Decompress NSString in objective-c (iphone) using GZIP or deflate

  - by Steven

  Hi, I have a web-service running on Windows Azure which returns JSON that I consume in my iPhone app. Unfortunately, Windows Azure doesn't seem to support the compression of dynamic responses yet (long story) so I decided to get around it by returning an uncompressed JSON package, which contains a compressed (using…

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• Objective-C NSMutableArray Count Causes EXC_BAD_ACCESS

  - by JoshEH

  I've been stuck on this for days and each time I come back to it I keep making my code more and more confusing to myself, lol. Here's what I'm trying to do. I have table list of charges, I tap on one and brings up a model view with charge details. Now when the model is presented a object is created to fetch a XML…

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• Converting long value to unichar* in objective-c

  - by conmulligan

  I'm storing large unicode characters (0x10000+) as long types which eventually need to be converted to NSStrings. Smaller unicode characters can be created as a unichar, and an NSString can be created using [NSString stringWithCharacters:(const unichar *)characters length:(NSUInteger)length] So, I imagine the…

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• OAuth with Google Reader API using Objective C

  - by Dylan

  I'm using the gdata OAuth controllers to get an OAuth token and then signing my requests as instructed. [auth authorizeRequest:myNSURLMutableRequest] It works great for GET requests but POSTs are failing with 401 errors. I knew I wouldn't be able to remain blissfully ignorant of the OAuth magic. The Google…

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• iPhone Objective C - error: pointer value used where a floating point value was expected

  - by Mausimo

  I do not understand why i am getting this error. Here is the related code: Photo.h #import <CoreData/CoreData.h> @class Person; @interface Photo : NSManagedObject { } @property (nonatomic, retain) NSData * imageData; @property (nonatomic, retain) NSNumber * Latitude; @property (nonatomic, retain)…

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• objective c compare two date strings in NSDate

  - by mac

  Hi I am having two date as string , that is assigned to two labels, one label holds current date string, that is may 29, 2010 similarly the other date will be selected by user in this same format, i need to check the user date is present, past , or future. by comparing with current date string. please…

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• Is Objective C fast enough for DSP/audio programming

  - by morgancodes

  I've been making some progress with audio programming for iPhone. Now I'm doing some performance tuning, trying to see if I can squeeze more out of this little machine. Running Shark, I see that a significant part of my cpu power (16%) is getting eaten up by objc_msgSend. I understand I can speed this up…

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• Objective C - displaying data in NSTextView

  - by Leo

  Hi, I'm having difficulties displaying data in a TextView in iPhone programming. I'm analyzing incoming audio data (from the microphone). In order to do that, I create an object "analyzer" from my SignalAnalyzer class which performs analysis of the incoming data. What I would like to do is to display…

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• Objective C defining UIColor constants

  - by futureelite7

  Hi, I have a iPhone application with a few custom-defined colors for my theme. Since these colors will be fixed for my UI, I would like to define the colors in a class to be included (Constants.h and Constants.m). How do I do that? (Simply defining them does not work because UIColors are mutable, and…

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• Help with a compiler warning: Initialization from distinct Objective-C type when types match

  - by Alex Gosselin

  Here is the function where I get the compiler warning, I can't seem to figure out what is causing it. Any help is appreciated. -(void)displaySelector{ //warning on the following line: InstanceSelectorViewController *controller = [[InstanceSelectorViewController alloc] initWithCreator:self]; …

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• String contains string in objective-c (iphone)

  - by Jonathan

  How can I check if a string (NSString) contains another smaller string? I was hoping for something like: NSString *string = @"hello bla bla"; NSLog(@"%d",[string containsSubstring:@"hello"]); But the closest I could find was: if ([string rangeOfString:@"hello"] == 0) { NSLog(@sub string doesnt…

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• memory warning, generating UIImagefrom pdf files in objective-c

  - by favo

  When converting PDF Pages into UIImages I receive memory warnings all the time. It seems there is either some leak or something else that eats my memory. Using instruments didn't give me any helpful details. I'm using the following function to generate images from a pdf file: -…

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• Objective-C Xcode: Prefix.pch question?

  - by Johannes Jensen

  I have two files independant on each other. Let's just call it Class1 and Class2. In Class1, I need Class2, and in Class2 I need Class1. I have a prefix file where I include all my files, and I get some syntax errors because I do #import "Class1.h" #import "Class2.h" How…

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• issues make a persistent object in Objective C

  - by oden

  Attempting to make a NSObject called 'Person' that will hold the login details for my application (nothing to fancy). The app is made of a navigation controller with multiple table views but I am having issues sharing the Person object around. Attempted to create a static…

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• Objective-C runtime reflection (objc_msgSend): does it violate the iPhone Developer License Agreemen

  - by GamingHorror

  Does code like this (potentially) violate the iPhone Developer License Agreement? Class clazz = NSClassFromString(@"WNEntity"); id entity = [clazz entityWithImage:@"Icon.png"]; SEL setPositionSelector = NSSelectorFromString(@"setPosition:"); objc_msgSend(entity,…

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• Objective-C / UIButton / SetTitle

  - by apple92

  Does the setTitle method of UIButton retain the NSString passed as argument ? I guess I can rely on the fact that the property is defined as: property(nonatomic,readonly,retain) UILabel *titleLabel In this case, I think that it does retain the string. Thanks,…

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• Objective-C : Sorting NSMutableArray containing NSMutableArrays

  - by Dough

  Hi ! I'm currently using NSMutableArrays in my developments to store some data taken from an HTTP Servlet. Everything is fine since now I have to sort what is in my array. This is what I do : NSMutableArray *array = [[NSMutableArray arrayWithObjects:nil]…

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• Objective-C "miscasting" a string/int using stringWithFormat and %d

  - by user141146

  Hi, I think this is a relatively simple question, but I don't precisely know what's happening. I have a method that tries to build a string using NSString's stringWithFormat It looks like this: NSString *line1 = [NSString stringWithFormat:@"the car is %d…

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• Dealloc on my custom objective-C

  - by VansFannel

  Hello. I'm developing an iPhone application, and I very new on iPhone development. I've created some custom classes with instance variables (NSArray, NSString, etc.). All classes inherits from NSObject. Should I create a dealloc method to release all…

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• How to format float to 2 decimals in objective C

  - by iamdadude

  I have a string that I'm converting to a float that I want to check for values in an if statement. The original float value is the iPhone's trueHeading that is returned from the didUpdateHeading method. When I convert the original float to a string…

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• Objective-C : Fowler–Noll–Vo (FNV) Hash implementation

  - by Dough

  Hi ! I have a HTTP connector in my iPhone project and queries must have a parameter set from the username using the Fowler–Noll–Vo (FNV) Hash. I have a Java implementation working at this time, this is the code : long fnv_prime = 0x811C9DC5; long…

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• Objective-C: How to replace HTML entities?

  - by arielcamus

  Hi, I'm getting text from Internet and it contains html entities (i.e. &oacute; = ó). I want to show this text into a custom iPhone cell. I've tried to use a UIWebView into my custom cell but I prefer to use a multiline UILabel. The problem is…

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• best way to save data in ipod touch/iphone objective-c

  - by Leonardo

  Hi all, I am writing a very simple application, for iphone. Unfortunately I am really a newbie. What I am trying to do is to save data at the end of a user experience. These data are really simple, only string or int, or some array. Later I want to…

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