cocoa-touch

Drawing an offscreen coloured square returns a greyscale image

I asked this question earlier and am now trying to explore the idea of making an offscreen image. Something is going wrong - I think maybe with colour space? I've boiled the code down and down and down, until I eventually can demonstrate the problem with just a few lines. I have a view with an imageview (called iv) and a button, which...

iPhone SDK: Rendering a CGLayer into an image object

Hi all, I am trying to add a curved border around an image downloaded and to be displayed in a UITableViewCell. In the large view (ie one image on the screen) I have the following: productImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:product.image]]; [productImageView setAlpha:0.4]; productImageView.frame = CG...

Best Geocoding Service for iPhone Developers

I have made an app that gets an array of addresses from a web service and I want to map them. I know Apple left this out in MapKit, including only a reverse GeoCoder. I was wondering what the best way to approach this problem was. Web Service? Google Maps API (How do API keys work?)? CloudMade? What is your opinions on which service is ...

How do I Assign a Name to a Photo Saved in the Photo Library?

I am currently working on a project in which I have to save an image to the photo library and assign a name to each captured image. I know how to save the image, but how do you assign a name to the ones saved in the library? My code: -(void)imagePickerController:(UIImagePickerController *) picker didFinishPickingMediaWithInfo:(NSDicti...

Objective-C - When to use 'self'

This is unmodified code from Apple's iPhone 'Utility Aplication' template: - (void)applicationDidFinishLaunching:(UIApplication *)application { MainViewController *aController = [[MainViewController alloc] initWithNibName:@"MainView" bundle:nil]; self.mainViewController = aController; [aController release]; mainViewController.view...

Localized price from App Store

I'm putting links to other apps by the same company into an iPhone app, and we want to display the price of those apps. Is it possible to somehow get the localized price string (amount and currency) that's appropriate for the user? I imagine I'd have to resort to something like screen scraping, but I've seen that people can get quite a l...

Popping UIView programmatically failing.

I am having trouble programmatically removing stacks from a view. I am doing things a bit convoluted, which is certainly not helping matters. Here is what I want to do: User is in one tab of a tab view controller. User selects item from table that contains URL. App switches to another tab view, and sets an existing UIWebView to the sel...

How to create an timeline on iPhone

Hello, I am trying to create an inifite timeline in my iPhone app to scroll through time. I think I am going to use a UIScrollView to do that but I am not sure how to do that. Am I supposed to create a reusable queue of views from scratch with views containing the days/months/years and reuse them when they go out of the screen ? (I have...

iPhone: How to fix a legacy iPhone app which has really bad memory management? unittesting?

Hi, I recently inherited an iPhone app. The original developer did not understand memory management and well the app works in simlulator but not in on old iPhone (lots of crashses). Do you have any thoughts on the process by which I can save the app? Can I utilize or create any unittest to find memory leaks and make the process 'scien...

read from NSMutableDictionary without leaks ;)

Hello everyone. I've searched for some time already so I ask my question. I want to display data in a UITableView. each content of each cell of this tableview is set in an object specially created for this purpose (cellPlainObject). a cellPlainObject contains many strings, images and so on ... theses cellPlainObject are storred in a N...

What's wrong with how I'm accessing NSSet from my ModelObject?

Hi all, I've been trying to get to grips with Core Data and I'm having some difficulty with my fetched results. The problem is that I have 'Branch' objects which have a to-many relationship to 'Telephone' objects. When I return a 'Branch' and try to access all related 'Telephone' objects from the returned NSSet, I seem to only get one ...

share a property among different instance of the same class

Is it possible to share one parameter of a class among all the instances of this class, in objective-c?: @interface Class1 : NSObject { NSString* shared; /** shared among instance (this is not, but defined somehow) **/ NSString* non_shared; /** other parameters non shared **/ } In the program then, each instance of Class1 has ...

What's the proper NSDateFormatter format for this string?

February, 26 2010 21:34:00 Based on all the documentation I can find, MMMM, d yyyy H:m:s should be correct - but my NSDate dateFromString is returning null. ...

How do I put objects in an NSArray into an NSSet?

Hi all, I have some NSDictionary objects stored in an NSArray called telephoneArray. I fetch the values for the key number and then replace the NSDictionary I've just read with a new object at the same index in the array. I then want to put these new objects into an NSSet. How can this be achieved? See my unsuccessful attempt below. ...

iPhone - stdint.h file not found!

I am dealing with a project designed for iPhone OS 2.0 and I am intending to keep compatibility with this version while offering new OS 3.x functionality. When I set the base SDK to iPhone OS 3.1.3 and Target OS for 2.0, Xcode gives me this error during compilation. 'stdint.h' file not found /Developer/usr/lib/clang/1.0.1/include/stdin...

Run an UIActivityIndicatorView while the main thread is busy

Hi all, is there a way to display the animated spinning wheel while the main thread does a lengthy operation? The animation is handled by the same thread that created the UIActivityIndicatorView, right? If so, can views that belong to several threads sit in the same view hierarchy? All else failing, I don't mind moving a lengthy operat...

Contact importing in iPhone

Hi guys, Can anyone suggest me how to work with contact importing in Iphone sdk? I mean to import the address book into my application. Thanks. ...

How should I implement an editable rich document view for the iPhone?

I want to implement a view in an iPhone application that is essentially like a rich text document. I need it to be click-editable, and I'd like to be able to embed graphic objects (either an overlaid view object, or manually drawn in graphic) with the text wrapping around. much like you would expect in a word processor. That's about t...

Changing GUI from a thread that's not the main thread?

My idea is to have a view that is showing the user when something is calculated behind the scenes. It is a view with a height of 30px containing an UIActivityIndicatorView and an UILabel showing what is beeing calculated right now. I tried to implement it by having a ActivityHandler with these methods: - (void)newActivityStarted{ [...

using JSON in cocoa

I'm using cocoa JSON framework http://code.google.com/p/json-framework/ Here is the result of an JSON output that I get. I can see that results in dictionary Response { "completed_in" = 0.02461; "max_id" = 10088639298; "next_page" = "?page=2&max_id=10088639298&q=apple"; page = 1; query = apple; "refresh_url" = "?since_id=10088639298&q=...