Efficient thumbnail creation in iPhone
What's the most efficient way to create a thumbnail from an arbitrary web image in iPhone? ...
iphone
Steps in subclassing UINavigationController
Hello I would like to subclass the UINavigationController to get some more freedom in regards to the appearance of the controller. I have some graphics for the different parts, bars, buttons, text etc. Looking at the UINavigationController header file I get little help, I don't know where to start out. I have never subclassed/overridd...
Naming a file downloaded from url in iPhone
I would like to save a file downloaded from the internet in iPhone. Can I use the url as the file name? If not, what transformation should I apply to the url to obtain a valid file name? I need to find the local copy of the file later using its url. Edit: Not asking where or how to write a file to disk. The question is limited to get...
How to customise the UINavigationBar that appears when there are too many UITabBar items?
The main thing that I'd like to change is the tint of the UINavigationBar that appears in the "More" item of a UITabBar. I've done this for other NavigationControllers in normal items, but I haven't found where the one in the More item is defined. ...
Read from plist insted of Code array
Hi Guys am Using UITableView - Searching table view its really nice easy tutorial but i really have bad time try to read from plist that what i did change - (void)viewDidLoad { [super viewDidLoad]; //Initialize the array. listOfItems = [[NSMutableArray alloc] init]; TableViewAppDelegate *AppDelegate = (TableViewAppDelegate *)[[UIA...
How can I capture the amount of surface area that the user is making contact with the iPhone screen?
Is there a way to capture the amount of screen that is making contact with the users? I assume there is since this finger painting app shows the ipad responding to only the pixels that the user makes contact with. Thanks so much in advance for your help! ...
how can I show compass/heading on mapkit mapview
on the iPhone 3GS in the "Maps" app you can click the icon which usually shows your position twice and the blue dot gains what looks like a beam from a headlamp, basically showing you the direction you are facing on the map and rotating the image accordingly. Is this option available using MapKit MapView ? I'm know that I can get my h...
Zero KB SQLite File created by Core Data on application start up
I'm developing an iPhone application using Core Data. I had everything working and had to make an adjustment to the database schema and change the relationships through the xcdatamodel file. I deleted the my project's sqlite file in Library/Application Support/iPhone Simulator/3.1.3//Documents. Build and run the application, it creates t...
"pay if you want to" using in app purchases (iphone)
I realise that you can't use in app purchases for real things. But does an in app purchase actually have to give extra functionality in the app. Can it be used to have optional paying? I've made an app that really should be free but I'd like to make a little money even if it's only one 59p. So could I have an in app purchase which users ...
expected ":" before "]" token + confused by earlier errors, bailing out
Ok so im at my wit's end here. I have tried every imaginable thing to get rid of these errors heres my code: - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // Navigation logic may go here. Create and push another view controller. /* //<#DetailViewController#> *detailViewController...
Core Data Change property value when another property changes
Hi, I have a Core Data Entity which has three properties startDate, endDate and duration. All three properties are persistent properties. I would like to know how I can calculate and update the duration property whenever the value for startDate and endDate changes? BTW, I won't be able to make the duration as transient property since I ...
Texture memory on iPad/iPhone 4
Does anybody know how much texture memory will be available for OpenGL on the new iPhone 4? How much is on the iPad? Thanks! ...
My mental block - struggling to learn Objective C
Hello people, this would be my first question after signing up! Anyway heres my question, I did Java at university and I was always told I am a good programmer. However I never pursued it as a career - I went into support and management instead. Im pretty much bored with my job, I have therefore started to learn Objective C so that I can...
NSEntityDescription entityForName returning nil
Hi, I did some changes to my model (but I don't want migration yet, so I just remove the application, built clean etc.) However, when I run it on the iPhone or in the simulator, I get the following error: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'executeFetchRequest:error: A fetch request mus...
iPhone SpeakHere example produces different number of samples
I am looking at the SpeakHere example and added the following: // Overriding the output audio route UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker; AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof (audioRouteOverride), &audioRouteOverride); assert(status == noErr); // Changing the default o...
Help: Instance Variables & Properties [iPhone]
In something like this: @interface Control_FunViewController : UIViewController { UITextField *nameField; UITextField *numberField; } @property (nonatomic, retain) IBOutlet UITextField *nameField; @property (nonatomic, retain) IBOutlet UITextField *numberField; I understand that "UITextField *nameField;" is an instance variabl...
App Crashes Loading View Controllers
I have the following code in my AppDelegate.h file: @class mainViewController; @class AboutViewController; @interface iSearchAppDelegate : NSObject <UIApplicationDelegate> { UIWindow *window; mainViewController *viewController; AboutViewController *aboutController; UINavigationController *nav; } @property (nona...
SImple links between UI objects in cocoa
I simply want to link a label to a slider in order for it to display the current value of that slider. This is my first time working with objective-c, and the problem seems far more complicated than in Java or C#. Help would be appreciated. ...
Cycle backwards through NSArray
Hello! I'm trying to cycle backwards through an array by clicking a button. My current code is close, but doesn't quite work. - (void)viewDidLoad { self.imageNames = [NSArray arrayWithObjects:@"MyFirstImage", @"AnotherImage", nil]; currentImageIndex = 0; [super viewDidLoad]; } ...what works: - (IBAction)change { UIImage* imageToSh...
Is it possible to change UIBarButtonItem title and style in runtime?
Hello everyone In one project, I hope to change UIBarButtonItem and style in runtime editBarItemButton links to a UIBarButtonItem which original status are style:UIBarButtonItemStyleBordered title:Edit if I press the bar item button, it will execute the codes below: [editBarItemButton setStyle: UIBarButtonItemStyleDone]; [editTarBar...