iphone

[NSManagedObject isEqualToString:]: unrecognized selector sent to instance 0x454a590'

Hello, I'm getting the above error and have no idea where its happening. Is there any way to debug it. I've put in some breaks points already buts its not abending its not abending those areas. Code below: -(void)viewDidLoad { if (managedObjectContext == nil) { managedObjectContext = [(NewWorkoutViewC...

Objective C memory leak

Hi all, I want to clarify whether there is a memory leak in this code? As far as I feel its there. in .h file @interface MyClass{ NSMutableArray *dataArray; } @property(nonatomic,retain) NSMutableArray *dataArray; in .m file -(id) init{ self. dataArray = [[NSMutableArray alloc]init]; } -(void) dealloc{ ...

Managing large databases on iPhone devices: simple sqlite3 coding or CoreData?

Hi, I have to manage a table on a large database with over 20k records (the db size is 25MB). I use standard queries like SELECT\INSERT etc. programmatically using SQLITE framework. But the app on the Device is VERY VERY slow. When I tap the icon, the Default.png freezes for 10-20 seconds and the app crashes. When I run it on the simulat...

How do you animate the layout of the UI elements in a custom view of an iOS app?

I'd like to build a preferences screen in my iOS app that has a segmented control at the top and, depending on its state, it will determine which sliders and switches are visible, as well as where they're positioned. When you change the state of the segmented control and the layout of the screen changes, I'd like it to animate smoothly ...

How to measure how hard someone is whistling into iPhone mic?

I'd like to do an application that detects if someone is blowing/whistling into an iPhone mic. Something like Ocarina by Smule. Any code examples / tutorials on that subject? ...

Working with text fields in a UITableView

Hi I am making a search form with a number of free text fields that I would like the user to edit in line on a tableview (and not go to a seperate view for each individual item). So far I have it so when you press on the field, a text input dialog appears, here is the relevant code: - (UITableViewCell *)tableView:(UITableView *)tableVi...

How to write this method in Objective-C?

I just started Objective-C recently, and this has once again gotten me to the point of asking SO for help. I need to rewrite this method so that I can call it using [self URLEncodedString]; This is what the method currently looks like - - (NSString *)URLEncodedString { NSString *result = (NSString *)CFURLCreateStringByAddingPerce...

pushViewController problem with touches

Hi, I've got following problem with the recognition of touch-Events First of all I push a programmatically created view with a lot of imageViews inside. Before I click the button to push this view all touch-Events are called correctly, but after pushing the new view no touch-Events are called. Thanks for help! ...

Default Navigation Bar Color

I have some items that change the navigation bar color when the detail pages are accessed. My issue is getting back to the default navigation bar color. What color is it? It is not blue or gray for sure. Also when going "back", where is the best place to put this color change? Unload does not seem to work for this. On the table view con...

Simple iphone networking in different threads

I guess my question stems from ignorance on how network communication is done on different threads on the iOS platform. I have a TcpConnection class which is a wrapper for input and output streams to a printer. the Open call looks like this: CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault, (CFStringRef) ipAddress, port, &read...

Tools required for jailbroken Device applications

Hi, I like to know about teh various tools required to develop for jailbroken application. I have seen many links dealing with jailbroken devices says about the Open Toolchain . Does it really required for developing applications for jailbroken devices. Can anyone clearly elaborates regarding the open toolchain and other development t...

Rails: How to send a json object to a other server?

Hi everybody, I'm trying to implement the in App purchase mechanism in my iPhone app. To do so I need to make a json object out of the receipt string on my rails server, and send it to a iTunes server. How can I create a json object out of a string? to_json didn't work for me... How can I send that json object to the specified Server ...

Is NSUserDefaults the correct place to store a list of favorites?

Hi, I am programming an app for iOS, allowing the user to make connections via tcp/ip. The user is able to save a server as a favorite. To make this possible I am serialising the server object and storing it to the NSUserDefaults. Is this the correct way to go or should I rather save the serialised object to the file system? Thanks, M...

Filter / prioritize phone numbers on the iPhone

Is it anyway possible to tag certain phone numbers on your iPhone as high priority numbers, and then filter them out to perform some actions on them?.. e.g. allowing calls from these numbers to come through even when the ringer is off. Does Apple even provide the dev access to phone api's to allow this sort of work?.. Thanks.. ...

UIScrollView pinch to create a larger zoom effect

Hi, I'm using a regular UIScrollView. How can I make the pinch-out gesture create a larger zoom? let's say two-times the zoom I get today... 10x ...

how to add slider pop view in my view using interface builder

i hav seen in some other projects like they hav slider pop view to show up images and videos and all other contents in thumb nails and when i try to add using interface builder i can not do this .. where is the option in IB for SPV.... ...

Alloc and init buffer and play DTMF

I want to allocate a memory buffer and initialize it with data of a mathematical equation in order to gain a pure DTMF tone. I am using the AudioQueueServices library to allocate and fill the buffer. I used a formula of 2 sine waves and 2 different frequencies. However, neither a sound nor a tone is not played. It may be important to me...

iPhone SDK: Copying Array

I have an array : //current array NSMutableArray *arrayCurrentArray; //and index indexCurrentPage = 1; the array needs to be initialized at run-time like this: arrayCurrentArray = [[NSMutableArray alloc] initWithArray:arrayBrotherPirateEnglish copyItems:YES]; this is how the array is initialized: arrayBrothe...

Next Item in Plist Button

Hey guys, i have a simple app just a load of images in one image view. Each is just included in a plist file and called when a cell is selected in popover window. All i want is a button with an action to get next item in plist and display in the image window. this sounds easy but i cant figure out the code to grab next item in plist? can...

Is there any way to simulate multiple iOS devices running a Bonjour networking app?

I want to build a multiplayer iPhone game that allows multiple iPhones (clients) to connect to a single iPad (server) using Bonjour. Since I only have one iPhone and one iPad, is there a way to run multiple instances of the iPhone simulator to simulate the multiplayer app? If not, does anyone have any creative solutions to testing a mul...