objective-c

Comparing NSDates

Hi, I have an NSDate object called 'dueDate'. I'm trying to work out how to display if the due date was yesterday or is tomorrow. How would I go about this? ...

Modelview navigation problem

i have a navigation controller displaying as a modelview controller. That model view controller calling from another view controller. In that modelview controller im navigating to different controllers and its working fine. but when i return to that model view controller the navigfation is not smooth and i can see space between that con...

How to concatenate two float values in Objective-C?

I am developing an application, and I am not able to concatenate two float values. ...

Creating my own bundle in xCode, for iPhone application

Hello everyone! I am having some difficulty creating a bundle for my application, and placing files in the bundle. For example, Facebook has developed a bundle for iPhone applications using their framework. In the same way, I also want to create a bundle which can be reused for many applications. My questions are: what steps should ...

Determining credit/debit card type

Hi, I'm writing a POS application for the iPhone/iPod combination, using the same exact hardware used in Apple Stores:: EasyPay. Ok, my hurdle is this: how do I identify which credit card type is being used as text is entered in the uitextfield? I assume I've to use textField:shouldChangeCharactersInRange:replacementString:? However, I...

Which way to store this data is effective?

I am writing a game, which need a map, and I want to store the map. The first thing I can think of, is using a 2D-array. But the problem is what data should I store in the 2D-array. The player can tap different place to have different reaction. So, I am thinking store a 2D-array with objects, when player click some position, and I find i...

Rotate image in Quartz? Image is upside down! (iPhone)

I don't want to transform the ENTIRE context. I'm making a game with Quartz, and I'm drawing my player with lines, rects and ellipses. And then I have diamong.png which I rendered at 0,0 in the top left of the screen. Problem is... It renders upside down! How would I rotate it 180 degrees? Here's some of my code: CGImageRef diam...

Conflit between AVAudioRecorder and AVAudioPlayer

Hi, here is my problem : The code (FooController) : NSString *path = [[NSBundle mainBundle] pathForResource:@"mySound" ofType:@"m4v"]; soundEffect = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL]; [soundEffect play]; // MicBlow micBlow = [[MicBlowController alloc]init]; And MicB...

iphone Json POST request to Django server creates QueryDict within QueryDict

I'm creating a JSON POST request from Objective C using the JSON library like so: NSMutableURLRequest *request; request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@/%@/", host, action]]]; [request setHTTPMethod:@"POST"]; [request setValue:@"application/json-rpc" forHTTPHeaderField:@"Content...

Re-ordering a collection of UIView's based on their CGPoint

Hi all, I have a NSMutableArray that holds a collection of UIViewControllers Amongst other properties and methods an instance of each of the viewControllers are placed in a parent view The user will place these objects individually when desired to. So essentially I use - (void)addSubview:(UIView *)view when a new view is added to th...

Editable table view cell

I am creating an application. I have to implement a bookmark feature, and adding one should be similar to this: I want editable UITableViewCells for text input. I was wondering if there is an easier way then embedding a UITextField into a UITableViewCell. And if not, can someone explain how I can use the UITextField inside it? Thanks ...

Can I avoid explicitly casting objects with a common subclass?

I have an iPodLibraryGroup object and Artist and Album both inherit from it. When it comes to my view controllers though I find that I'm duplicating lots of code, for example I have an ArtistListViewController and and AlbumListViewController even though they're both doing basically the same thing. The reason I've ended up duplicating t...

Iphone SDK - tap to undo a zoom inside of a scroll view

Hi, I was just wondering how I can get a single tap to undo the zoom inside of a scroll view? I cant seem to figure it out. I was also wondering how do you know what size to set your scroll view contentSize, as I find this issue a little confusing at the moment I have it set at 460x320. Thanks ...

What's safe to assume about the NSMutableArray / NSArray class cluster?

I know you shouldn't use this to decide whether or not to change an array: if ([possiblyMutable isKindOfClass:[NSMutableArray class]]) But say I'm writing a method and need to return either an NSMutableArray or an NSArray, depending on the mutability of possiblyMutable. The class using my method already knows whether or not it's accep...

Changing color of alert views

How can I change the color of the alert view box from blue to black? Any one please help!! ...

Send parameters to a web service.

Before I start: I'm programming for Iphone, using objective C. I have already implemented a call to a web service function using NSURLRequest and NSURLConnection. The function then returns a XML with the info I need. The code is as follows: NSURL *url = [NSURL URLWithString:@"http://myWebService/function"]; NSMutableURLRequest theRequ...

Object C casting

Hi, I'm trying to cast this statement: [self handError:noConnectionError]; basically, this statement is in a class, which is not the app delegate, but is the .m file of a view, specifically a view after uitableview, which contains its own uiviewtable. The warning that statement gives me is that the error produced may not be apparent ...

incorrect variable value outside main()

i have this code #import <Foundation/Foundation.h> int testint; NSString *teststring; int Test() { NSLog(@"%d",testint); NSLog(@"%@",teststring); } int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; testint = 5; NSString *teststring = [[NSString alloc] initWithS...

Can I separate an NSString by more than 1 separator?

I would like to separate my string by spaces, commas, periods (ie. punctuations). I am using: [myString componentsSeparatedByString:@" "]; to separate by spaces, but need to be able to split by punctuations as well. ...

Why is the Objective-C Boolean data type defined as a signed char?

Something that has piqued my interest is Objective-C's BOOL type definition. Why is it defined as a signed char (which could cause unexpected behaviour if a value greater than 1 byte in length is assigned to it) rather than as an int, as C does (much less margin for error: a zero value is false, a non-zero value is true)? The only re...