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• pitchbend (varispeed) audio with iPhone SDK's AudioUnit

  - by fetzig

  hi, I'm trying to manipulate the speed (and pitch) of a sound while playing. so i played around with iphone sdk's AudioUnit. downloaded iPhoneMultichannelMixerTest and tried to add an AUComponent to the graph (in this case a formatconverter). but i get (pretty soon) following error when building: #import <AudioToolbox/AudioToolbox.h>…

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• Open Source sound engine

  - by Steph Thirion

  When I started using SoundEngine (from CrashLanding and TouchFighter), I had read about a few people recommending not to use it, for it was, according to them, not stable enough. Still it was the only solution I knew of to play sounds with pitch and position control without learning C++ and OpenAL, so I ignored the warnings and went on with…

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• Display shift when adding rows to UITableView

  - by Kamchatka

  Hello, I have a UITableView displaying an underlying NSFetchedResultsController. When the fetchedResultsController is updated, - (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type newIndexPath:(NSIndexPath…

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• UIImage Rotation

  - by Kamchatka

  I display an image in a UIImageView (within a UIScrollView) which is also stored in CoreData. In the interface, I want the user to be able to rotate the picture by 90 degrees. I also want it to be saved in CoreData. What should I rotate in the display? the scrollview, the uiimageview or the image itself? (If possible I would…

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• How to configure the framesize using AudioUnit.framework on iOS

  - by Piperoman

  I have an audio app i need to capture mic samples to encode into mp3 with ffmpeg First configure the audio: /** * We need to specifie our format on which we want to work. * We use Linear PCM cause its uncompressed and we work on raw data. * for more informations check. * * We want 16 bits, 2…

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• A way to enable a LaunchDaemon to output sound?

  - by Varun Mehta

  I have a small Foundation application that checks a website and plays a sound if it sees a certain value. This application successfully plays a sound when I run it as my user from the Terminal. I've configured this app to run as a LaunchDaemon, with the following plist: <?xml version="1.0" encoding="UTF-8"?>…

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• Unit Testing Model Classes that inherit from NSManagedObject

  - by Matt Baker

  So...I'm trying to get unit tests set up in my iPhone App but I'm having some issues. I'm trying to test my model classes but they inherit directly from NSManagedObject. I'm sure this is a problem but I don't know how to get around it. Everything is building and running as expected but I get this error when…

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• How to draw a drop shadow AND gradient with quartz2d?

  - by Luke

  Hello! I've a custom shape drawing using coregraphics and i want to add a drop shadow and a gradient to it also. I've been trying and searching a lot of informations on how to combine and do this, but i can't get it to work. I'm able to draw only one either. Anyone doing this already or know how to do this?…

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• So does Apple recommend to not use predicates and sort descriptors in an NSFetchRequest?

  - by dontWatchMyProfile

  From the docs: To summarize, though, if you execute a fetch directly, you should typically not add Objective-C-based predicates or sort descriptors to the fetch request. Instead you should apply these to the results of the fetch. If you use an array controller, you may need to subclass…

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• Rendering a Long Document on iPad

  - by benjismith

  I'm implementing a document viewer with highlighting/annotation capabilities for a custom document format on iPad. The documents are kind of long (100 to 200 pages, if printed on paper) and I've had a hard time finding the right approach. Here are the requirments: 1) Basic rich-text styling: control of…

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• Change animation time for properties of a CALayer.

  - by Alexsander Akers

  I have a CALayer to animate a change in its image contents. Now, how can I change how long it takes for this animation to take place?

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• Handle row deletion in UITableViewController

  - by Kamchatka

  Hello, I hava a UINavigationController. The first level is a UITableViewController, the second level just shows details on one of the items of the table view. In this detail view, I can delete the item. It deletes the underlying managed object. When I pop back to the view, I have a crash. I…

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• Is the foobar:finished:context: method of UIView animations delegate really giving a BOOL for finish

  - by mystify

  Althoug I read everywhere that the method signature has a BOOL for finished, I do never get a false. It is always true. And now the strange thing: When I NSLog that out with %d, it is always either 32 or 40. Other BOOLs I have are either 1 or 0. That makes no sense. So: Not a bool, right? …

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• Animate the enabling of a UIBarButtonItem?

  - by Michael Brewer

  Is there a way to animate enabling or disabling a button? I've tried the following with no success. I'm guessing at this point that the enabled property cannot be animated like opacity can – but I hope I'm wrong. [UIView beginAnimations:nil context:nil]; [UIView…

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• Get CALayers view

  - by eaigner

  Hi, is it somehow possible to get the nearest "container" NSView of a CALayer? My problem is I'm managing tracking areas in my "container" NSView, and those need to be updated if a layer is moved/added etc. and i would like to automate that somehow instead of calling…

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• NSEntityDescription entityForName returning nil

  - by Kamchatka

  Hi, I did some changes to my model (but I don't want migration yet, so I just remove the application, built clean etc.) so my application works in the simulator. However, when I run it on the iPhone, I get the following error: *** Terminating app due to uncaught…

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• Batch faulting in a to-many relationship for a collection of objects

  - by indragie

  Scenario: Let's say I have an entity called Author that has a to-many relationship called books to the Book entity (inverse relationship author). If I have an existing collection of Author objects, I want to fault in the books relationship for all of them in a…

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• Does anyone know a tutorial that teaches you to make a bobblehead?

  - by user134721

  I'm trying to make a bobble head app, but I don't know how to use the movement technology.. Any thoughts? Thanks

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• NSMutableArray of NSString in CoreData(iPhone

  - by azia

  I have a class, which describe an object for parsing XML. This class contains NSStrings and NSMutableArrays of NSStrings.I want to store parsed data using CoreData. How should I write CoreData model to store such objects if there is no such data type like…

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• iPhone game audio and background music

  - by Boon

  Have a few questions related to adding sounds to my game, specifically intro music (for splash), background music (loop) and button event sounds. Hope you can share your knowledge on this. 1) Should I use compressed sounds or uncompressed sounds? Or…

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• CATransaction: Layer Changes But Does Not Animate

  - by macinjosh

  I'm trying to animate part of UI in an iPad app when the user taps a button. I have this code in my action method. It works in the sense that the UI changes how I expect but it does not animate the changes. It simply immediately changes. I must be…

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• How to set a reference from one object to another?

  - by Tzur Gazit

  Hi, Imagine the obvious model of employees and departments, where each employee must refer to a single department, and each department may have none to many employees. For Employee I have a pointer to Department, and I set its value to the…

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• Releasing instance if service not enabled?

  - by fuzzygoat

  I would just like to check if I have this right, I am creating an instance of CCLocationManager and then checking if location services are enabled. If it is not enabled I then report an error, release the instance and carry on, does that…

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• iPhone Audio Delay Line

  - by garylgsimpson

  I am looking into developing an audio delay line - external microphone to line out on the iPhone. Is there any sample code anyone could recommend? I have already been playing with SpeakHere and AurioTouch. AurioTouch is helpful although…

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• Simple sound effect loop using AudioToolKit

  - by Typeoneerror

  I've created a few sounds for use in my game. I can play them at certain events without issue: // create sounds CFBundleRef mainBundle; mainBundle = CFBundleGetMainBundle(); _soundFileShake = CFBundleCopyResourceURL(mainBundle,…

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