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• View Controller Question

  - by user341444

  First off I'm new at programming. I'm creating an app with one navigation bar controller. The app is pretty basic except for a quiz section that is comprised of 12 xibs. As the users takes the quiz a new xib is pushed onto the stack. I want to create a button that takes the user back to the home screen if they do not want to complete the quiz. …

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• Obj-C Sending Messages Between Classes

  - by user544359

  I'm a newbie in iPhone Programming. I'm trying to send a message from one view controller to another. The idea is that viewControllerA takes information from the user and sends it to viewControllerB. viewControllerB is then supposed to display the information in a label. viewControllerA.h #import <UIKit/UIKit.h> @interface viewControllerA :…

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• How do I display core data on second view controller?

  - by jon

  I am working on my first core data iPhone application. I am using a navigation controller, and the root view controller displays 4 rows. Clicking the first row takes me to a second table view controller. However, when I click the back button, repeat the row tap, click the back button again, and tap the row a third time, I get an error. I have…

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• Why do I have memory problems?

  - by Tattat

  I got this error from XCode: objc[8422]: FREED(id): message release sent to freed object=0x3b120c0 I googled and find that is related to the memory. But I don't know which line of code I go wrong, any ideas? After I launch my app in simulator, it prompts a second, than, no other error except the error above. @implementation MyAppDelegate …

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• How to create a timer the right way?

  - by mystify

  I always have an class which needs to set up a timer for as long as the object is alive. Typically an UIView which does some animation. Now the problem: If I strongly reference the NSTimer I create and invalidate and release the timer in -dealloc, the timer is never invalidated or released because -dealloc is never called, since the run loop…

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• regular expression to read the string between <title> and </title>

  - by user262325

  Hello every one I hope to read the contents between and in a html string. I think it should be in objective-c @"<title([\\s\\S]*)</title>" below are the codes that rewrited for regular expression //source of NSStringCategory.h #import <Foundation/Foundation.h> #import <regex.h> @interface…

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• Best memory allocation strategy for iOS ?

  - by Mr.Gando

  Hey guys, I'm debating myself about memory allocation on iOS. I write most of my code in C++ and I really like using ObjectPools, FreeLists, etc. In order to pre-allocate a lot of the stuff that I'll be constantly "alloc/dealloc" during the course of my game, ( like particles, game entities, etc ). Still on iOS, it's…

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• iphone: Help with AudioToolbox Leak: Stack trace/code included here...

  - by editor guy

  Part of this app is a "Scream" button that plays random screams from cast members of a TV show. I have to bang on the app quite a while to see a memory leak in Instruments, but it's there, occasionally coming up (every 45 seconds to 2 minutes.) The leak is 3.50kb when it occurs. Haven't been able to crack it for…

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• Objective-C static analysis tools -- plugin to Xcode?

  - by DevDevDev

  Are there any tools out there for Objective-C / xCode? Something that can do one or more of the following: Detect unused imports Auto-synthesize properties Autogenerate dealloc method from retained properties Provide method stubs for interface

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• Problem with Rotating a UIScrollview

  - by leachianus.gecko

  Hey guys, I am having issues trying to get the pageControl sample code to work with rotation. I managed to get it to rotate but it does not visually loads correctly until I start to scroll (then it works fine). Any Idea on how I can fix this problem? Here is a link to the project if you want to see it in…

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• AVAudioRecorder Memory Leak

  - by Eric Ranschau

  I'm hoping someone out there can back me up on this... I've been working on an application that allows the end user to record a small audio file for later playback and am in the process of testing for memory leaks. I continue to very consistently run into a memory leak when the AVAudioRecorder's "stop" method…

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• TTLauncherItem: change badge immediately (or: how to refresh TTLauncherView)

  - by vikingosegundo

  I have a TTLauncherView with some TTLauncherItems. These show badges, representing messages from the network. I set the badges in viewWillAppear:, so if I switch to another view and then return, the correct badges are shown. But I want to update the badges as soon a message comes in. Calling setNeedsDisplay…

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• UITabBarController rotation problem with popViewControllerAnimated and selectedIndex (iPhone SDK)

  - by rjobidon

  Hi! This is a very important auto rotate issue and easy to reproduce. My application has a UITabBarController. Each tab is a UINavigationController. Auto rotation is handled with normal calls to shouldAutorotateToInterfaceOrientation and didRotateFromInterfaceOrientation. The interface rotates normally…

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• NSObjectController confusion binding to a class property. Help!

  - by scottw

  Hi, I'm teaching myself cocoa and enjoying the experience most of the time. I have been struggling all day with a simple problem that google has let me down on. I have read the Cocoa Bindings Program Topics and think I grok it but still can't solve my issue. I have a very simple class called MTSong that…

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• Is this a good way to do a game loop for an iPhone game?

  - by Danny Tuppeny

  Hi all, I'm new to iPhone dev, but trying to build a 2D game. I was following a book, but the game loop it created basically said: function gameLoop update() render() sleep(1/30th second) gameLoop The reasoning was that this would run at 30fps. However, this seemed a little mental,…

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• Do I need getters and setters if i'm depending on garbage collection in objective-c

  - by Chris

  New to Cocoa and Objective-c. Do I need getters and setters if I'm depending on garbage collection? For example is it safe to just modify instance variables directly without the dot syntax? And in the dealloc method can I sent them to nil instead of release (or do I even have to release them)?

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• copied the reachability-test from apple, but the linker gives a failure

  - by nico

  i have tried to use the reachability-project published by apple to detect a reachability in an own example. i copied the most initialization, but i get this failure in the linker: Ld build/switchViews.build/Debug-iphoneos/test.build/Objects-normal/armv6/test normal armv6 cd …

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• UITableView not getting populated

  - by jayshree430

  Hi. I have a peculiar problem. I created a normal Objective c class called SampleTable. I then extended UITableView instead of NSObject. Then in the initWithFrame constructor i initialized the table. I also made a NSMutableArray object for the datasource. I also conformed…

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• [obj-c] autorelease problem

  - by BQuadra

  Why the NSArray allocated with arrayWithObjects dealloc automatically if already used by BObject object?? in teory NSArray must remain allocated all the BObject life time... [[BObject alloc] initObjectName:@"oneObject" states: [NSArray arrayWithObjects: [[State…

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• TabBarController rotation problem with popViewControllerAnimated and selectedIndex

  - by rjobidon

  Hi! This is a very important auto rotate issue and easy to reproduce. My application has a UITabBarController. Each tab is a UINavigationController. Auto rotation is handled with normal calls to shouldAutorotateToInterfaceOrientation and…

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• CGContextFillEllipseInRect: invalid context

  - by hakewake

  Hi all, when I launch my app, I keep getting this CGContextFillEllipseInRect: invalid context error. My app is simply to make the circle 'pinchable'. The debugger shows me this: [Session started at 2010-05-23 18:21:25 +0800.] 2010-05-23…

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• Activity Indicator not displaying based on whether the UIWebView is loading or not...

  - by Jack W-H

  Hi folks Sorry if this is an easy one. Basically, here is my code: MainViewController.h: // // MainViewController.h // Site // // Created by Jack Webb-Heller on 19/03/2010. // Copyright __MyCompanyName__ 2010. All rights reserved.…

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• Undefined symbols for architecture armv7 using route-me

  - by Alex

  I'm trying to compile my project including route-me using armv7 although am struggling with the following error, i have older versions of the same project in git which compiles fine with armv7 so a setting must have changed somewhere to…

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• Iphone App crashing on launch

  - by Declan Scott

  Hey, My simple iphone app is crashing on launch, it says "the application downloadText quit unexcpectedly i none of these windows that pop up when a mac app crashes and has a send to Apple button. My .h is below and i would greatly…

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• Multiple View App shows Blank Screen in Simulator

  - by Brett Coburn

  Hello; I am developing a simple app that first shows a menu screen, and when a button is pressed, a game screen appears. I was able to develop the game screen without any issues, but when I changed the code to first display the…

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