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• NavBar displaying back twice when app changed to landscape mode

  - by Graeme

  Hi, Not sure what's going on here, but my iPhone apps nav bar shows back and the title of my detail view controller even when I'm back to the original view. It wasn't happening earlier, it has changed recently (but not sure when exactly). E.g. I click on a row, view the didSelectRow XIB and then click back on the NavBar controller, but it still shows back even though the view does change back to the original table view. I then have to press back again and then it clears. Update: It's as if its trying to go back three times instead of two. Because, if you visit another row without removing the back button, it stores it as if you need to go back twice. It works fine in portrait mode. Any ideas?

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• ipad simulator - sandbox area

  - by Mike

  Every iPhone/iPad application has its sandbox area, where I can store files. When I use the simulator this area will be somewhere in the hard disk. Is it possible to see this directory and its contents for a given application? I am debugging an iPad app and it will be a lot easier if I can see the sandbox area contents in real time, as the app runs and creates files there. Where do I find it? thanks for any help.

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• Cocoa Touch: Why doesn't UINavigationController render 'Back' button?

  - by Joshua

  When I push a view controller it animates properly and slides in, the only problem is that no 'Back' button is rendered up top.The back button is still there, I can still tap it, it just doesn't render on the screen. This behavior is identical in both the simulator and on multiple devices. Is this a known issue or bug? Using 3.1.3 of the iPhone SDK. More information: It renders it for further levels, just not on the second level of nav controller. So Main Page (No back button - OK). Second level page (back button, but doesn't render - not OK). Third level page (Back button there and rendering - OK).

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• How to rotate a UIImageView?

  - by jkally

  It's quite frustrating not to be able to do such a simple task: I have an "app" with a single viewcontroller, and in it a single UIImageView, that's initialized to a specific image at potrtait mode. Now when the iPhone gets roteated to landscape mode and the shouldAutorotateToInterfaceOrientation event fires, at which I return YES, my resulting UIImageView looks totally screwed up: either the image is stretched so to fill landscape mode frame (which looks ridiculuous of course) or the top and bottom of the image are cropped. How can I have my UIImageview and the contained image handle the device rotation gracefully, and display normal looking image at landscape mode as well?

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• Is there anyway to set values in the settings.bundle from within the APP

  - by joneswah

  Is there any way to set/update values in the settings.bundle from within your app. I am fine reading in values from the preferences into NSUserDefaults but was wondering whether you can set values from within the app. I have a web-app which I am making a iPhone client for and was thinking to include the users account details in the settings.bundle. This is fine if the user only updates the values through the Apple Application Preferences screens, but what if the user updated those values in the web app. I wanted to pull down the values from the web and then "update" the values in the settings.bundle from within the App. I am guessing that this is not possible and that maybe I need to create my own "in-app" settings screen? But thought I would check with you all first ...

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• Core Data data type for just the date - not including time

  - by Jason

  I am new at Core Data, and it seems like it is a great way to manage the data store. However I am also very memory-conscious due to the fact that the iPhone doesn't have that much of it. I was a little surprised to see that the data types are so limited - eg. there is a Date type which includes also the time, but no Date type for just the date! All the time information takes up precious bytes of memory, if I just wanted an attribute with the date (e.g. 2/15/2010 rather than 2/15/2010 02:34:48), how could I do this? Is it possible?

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• UIView animation

  - by iphonedevnoob

  I have a UIView(first view) on top of which I would like to display another UIView(second view). I display the second view using animation which causes the second view to be displayed for about 3/4 of the iPhone screen. The first view is visible underneath the animated second view. I would like to make changes to the first view as the second view is displayed. Any ideas on how I can achieve this. Right now, the animation completes, the second view is displayed and then I can change the first view. I would like to change the layout of the first screen as the second screen is being displayed. Any help is much appreciated.

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• Help modifying QuartzDemo example application

  - by BittenApple

  Can anyone please, oh sweet pain, please take me out of my misery by writing a simple example on how the heck you pass a number (int value) which gets created in 1 .m file to another .m file. In the apple demo application called QuartzDemo, there is a file called QuartzImages.m This file has the following line of code: [CODE]CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);[/CODE] Notice the (pdf, 1) in that line. This number should be replaced with an integer variable. Now, there is also a file called MainViewController.m. In that file, there is a method? called -(void)viewDidLoad In that method, I want to assign a number to the integer variable which would replace the damn "1" with whatever number I want. I have been pulling my hair trying to get this done, reading beginning iPhone 3 Development book, dev documentation and God knows what not, without results. Any help would be greatly appreciated... Sigh.

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• Does this popup view violate HIGS?

  - by brettr

  Will using a popup view to present a comment submission form violate the HIGS? I may have one popup with selections that goes to the final popup. Two popups back to back. This is more similar to a modal type of view than an alert or action sheet as described by the HIGS: http://developer.apple.com/iphone/library/documentation/UserExperience/Conceptual/MobileHIG/ModalViews/ModalViews.html#//apple_ref/doc/uid/TP40006556-CH11-SW1 under the section 'Using Modal Views'. Basically the type of view I'm shooting for is a combination of an alert with a custom view. It's sort of a mini view since it will be centered in the middle of the screen but not take up all of the viewing area. I'm fairly sure that is a violation however, but I'm looking for a few opinions on it. I believe what needs to happen is use a modal view, which will cover the entire view.

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• How to show alerts from the application when it is not running?

  - by chaitanya

  Hi, I have an application in which I have to show the alerts for user specied reminders, I am able to show these reminders when my application is running but my problem is i have to show thsese reminders to the user when my application is not running? is it possible to show the alerts or remindsers when the application is running? what i obsered in iphone native applications(messages, emails) it whill show no of unread or new messages at the top right tip of the icon on the desktop and it will keep on updates these count. Can I impplement these king of alerts to my applications? if yes how? it not is there any other to show the alerts when application is not running?

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• How to write multiple files from one NSData object?

  - by Kevin Cupp

  Hi there! I'm writing an iPhone app that includes in-app purchasing. It downloads a zip file, then I unzip the file using the popular NSData category (zlibDeflate) which outputs the uncompressed file into an NSData object. The zip file contains multiple files in it which I need to write to the Documents directory. How can I write each file separately from this one NSData object? writeToFile just writes the whole thing to one file. Thank you and let me know if you need any more information.

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• Why need to call NSTimer again in this code?

  - by Tattat

  - (void) applicationDidFinishLaunching:(UIApplication *)application { //set up main loop [NSTimer scheduledTimerWithTimeInterval:0.033 target:self selector:@selector(gameLoop:) userInfo:nil repeats:NO]; //create instance of the first GameState [self doStateChange:[gsMain class]]; } - (void) gameLoop: (id) sender { [((GameState*)viewController.view) Update]; [((GameState*)viewController.view) Render]; [NSTimer scheduledTimerWithTimeInterval:0.033 target:self selector:@selector(gameLoop:) userInfo:nil repeats:NO]; } This code is from a iPhone game development book. I don't know why the gameLoop method need to call the NSTimer again? in the applicationDidFinishLaunching, it set the NSTimer to do, why don't let it do every 0.033s, why add the same NSTimer code in the gameLoop method? thz.

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• App crashing when upgraded xcode

  - by funatsg

  Hi guys! I have this problem of my app crashing (only when press a certain UIButton) after i upgraded my xcode to the latest 3.2.5 and iPhone simulator 4.2. It works fine in my friend laptop, who hasn't upgraded yet. I googled for answers, but most of them faces problem only crashing in simulator but not device. Mine crashes for both. Anyone has any idea about this issue? I cant seem to find any solution.

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• how to set and access variable values from another classess

  - by BittenApple

  I am modifying QuartzDemo example app and want to do set and read values of integer type variables in other classes which are already included. For example, in MainViewController.m I want to set a numeric value (simple numbers from 1-100) to a variable which is then going to be called (read) in file QuartzImages.m. Question is how to define variable properly, set and access (read) the value. I am a beginner with Obj C and iPhone SDK in general and have some experience with Delphi and VB but this doesn't help at all :) Thank you, whoever and wherever you are, person who will take me out of this endless googling loop.

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• Using iPhotoGallery in a tab bar based application

  - by suranga

  Hi, I need to use a photo gallery similar to the one iPhone uses. For this I have downloaded the iPhotoGallery source code from google svn repository. (http://code.google.com/p/iphotogallery/). I need to know how to use this project in our own tab bar based application. i.e. I want to load the thumbs view when I go to a particular tab in my application. Does anybody have a clue?

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• NSUserDefaults doesn't save

  - by JJSaccolo

  Hi everybody! i'm trying to save some informations in an iphone/ipad app. The problem is that it works but if i close the app (with the home button on the simulator or closing with cmd+q) the informations become lost! this is my code (and, if you see, i used "syncronize") - (IBAction)choose1{ NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [defaults setObject:@"choose1" forKey:@"choose"]; [defaults synchronize]; } - (IBAction)choose2{ NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [defaults setObject:@"choose2" forKey:@"choose"]; [defaults synchronize]; } - (IBAction)openview{ NSString *var = [[NSUserDefaults standardUserDefaults] objectForKey:@"choose"]; if (var == @"choose1"){ [self pushViewController:view1 animated:YES];} else if (var == @"choose1"){ [self pushViewController:view2 animated:YES]; } } I don't understand why :(

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• Unit testing newbie team needs to unit test

  - by Walter

  I'm working with a new team that has historically not done ANY unit testing. My goal is for the team to eventually employ TDD (Test Driven Development) as their natural process. But since TDD is such a radical mind shift for a non-unit testing team I thought I would just start off with writing unit tests after coding. Has anyone been in a similar situation? What's an effective way to get a team to be comfortable with TDD when they've not done any unit testing? Does it make sense to do this in a couple of steps? Or should we dive right in and face all the growing pains at once?? EDIT Just for clarification, there is no one on the team (other than myself) who has ANY unit testing exposure/experience. And we are planning on using the unit testing functionality built into Visual Studio.

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• Freshy Ubuntu 12.10 install (Newbie)

  - by Alexander Marcev

  Hi i just installed ubuntu 12.10 on my ssd(picture below) and i set up my home directory to the 1 TB disc(picture below). I want in general use the ssd as my root folder as u can see, and install only the apps which are necessary. Games and other stuff goes to the 1 TB disc, but this disc shows me in gparted a usage of 14 GB on a freshly install, whats wrong? What about the ssd, do i have to manually optimize things? thx Alex PS: What if i want to install a Game to my home folder, i heard sth. of a symbol link, how to do that?

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• Newbie error with Windows Azure–403 not authorised

  - by simonsabin

  Azure uses certificates to manage secure access to the management side of things. I’ve started looking into azure for some SQLBits . So in doing so I needed to configure certificates to  connect. VS nicely will create a cert for you and copies a path for you to use to upload to azure. I went to the Azure portal ( https://windows.azure.com/Default.aspx ) found the certificate bit and added the certificate. However after doing this I couldn’t connect. After trying numerous fruitless things, including...(read more)

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• The newbie's guide to hacking the Linux kernel

  <b>TuxRadar: </b>"We asked prolific kernel hacker (and Linux Format reader!) Greg Kroah-Hartman to tell us what it takes for newbies to patch the Linux kernel - here's what he had to say."

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• Newbie, deciding Python or Erlang

  - by Joe

  Hi Guys, I'm a Administrator (unix, Linux and some windows apps such as Exchange) by experience and have never worked on any programming language besides C# and scripting on Bash and lately on powershell. I'm starting out as a service provider and using multiple network/server monitoring tools based on open source (nagios, opennms etc) in order to monitor them. At this moment, being inspired by a design that I came up with, to do more than what is available with the open source at this time, I would like to start programming and test some of these ideas. The requirement is that a server software that captures a stream of data and store them in a database(CouchDB or MongoDB preferably) and the client side (agent installed on a server) would be sending this stream of data on a schedule of every 10 minutes or so. For these two core ideas, I have been reading about Python and Erlang besides ruby. I do plan to use either Amazon or Rackspace where the server platform would run. This gives me the scalability needed when we have more customers with many servers. For that reason alone, I thought Erlang was a better fit(I could be totally wrong, new to this game) and I understand that Erlang has limited support in some ways compared to Ruby or Python. But also I'm totally new to the programming realm of things and any advise would be appreciated grately. Jo

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• Unit testing best practices for a unit testing newbie

  - by wilhil

  In recent years, I have only written small components for people in larger projects or small tools. I have never written a unit test and it always seems like learning how to write them and actually making one takes a lot longer than simply firing up the program and testing for real. I am just about to start a fairly large scale project that could take a few months to complete and whilst I will try to test elements as I write them (like always), I am wondering if unit testing could save me time. I was just wondering if anyone could give good advice: Should I be looking at unit testing at the start of the project and possibly adopt a TDD approach. Should I just write tests as I go along, after each section is complete. Should I complete the project and then write unit tests at the end.

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• Teamwork 101 for the solo newbie

  - by clankercrusher

  Forgive my newbishness but I have a question to ask about teamwork...mainly because I stink at it. Most of my projects up until this point have been solo so I have a very limited experience with teamwork. I did make graphics for a game that was being developed by several people, but that was completely different than programming with several different people. Right now I'm working with someone else on an indie MMO along with a few other team members. I've already made some pretty stupid mistakes, (like rewriting EVERYTHING) so I have two questions for you guys: 1) What are some of the most common mistakes that people make in a team environment and how can they be avoided? 2) How can the structure of your program be altered to allow for multiple teams members to work on different parts of the program at the same time? P.S. Is this the right stack exchange site for this type of question? (if not, where does it go? Thanks)

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• Opinion: Diary Of A Linux Newbie: The First Year

  In which an anti-Linux FUD article in a magazine backfires, and turns Emery Fletcher into an "unabashed Linux fan."

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• Newbie worried about CASE tool.

  - by Jason Evans

  Hi there. I'm looking for some guidance on CASE tools and whether my concerns are valid. Recently I was in a meeting between my employer and an external software company which have a CASE tool currently in beta. They demonstrated this tool to us, showing how you build a UML model in Enterprise Architect (or something like it) and then, through their tool, that UML model is transformed into a Visual Studio project, with C# files, stored procedures for SQL Server, code for the data layer, WCF stuff, logging code and allsorts. Now, admittedly, I don't see the point in this, as in I'm not convinced it will save that much time (plus it feels like overkill). The tool authors said that a trial of the tool at another company had saved a team there 5 weeks of development time (from 6 weeks down to about 1 week) using this tool. I find the accuracy of that estimate hard to believe. My main concern is whether using this tool is going slow down my productivity. For example - Say I have a UML model which I built a VS solution from. Now, I want to rename a class method to something else; will this mean having to update the UML model first and then rebuilding the code? Is this how case tools normally work? Something I will need to check with the authors is the structure of the generated VS solution. I like the Domain Driven Design way of project structure - Infrstructure, Services, Model, etc. I doubt very much this tool will do that. Also, I've been playing around with Entity Framework Code First and think it's a great way to build the data model. I have nice repositories, unit of work classes and other design patterns that work well with EF. I have data anootations and stuff like that working great. By not having EF (the CASE tool uses it's own data layer code) I'm concerned that this tool's data layer code might not be a nice to integrate in the UoW pattern, repositories, etc. This I will need to verify when I get a closer look at the generated code. What are other people's experiences with CASE tools? Am I being paranoid about nothing? Am I being unfair - are my negativities unfounded? EDIT: I like to use TDD/BDD for building my code, and using a CASE tool looks like it will make this difficult. Again, any feedback on this would be great. Cheers. Jas.

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