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• Building MobileVLCKit from git.videolan.org repository on macOsX with XCode

  - by ztepsic

  I would like to make an application for iOS(iPhone and iPad) that can play streaming videos through RTSP protocol (that includes mms). I imagined to achive a specified application using VLC player or libVLC library. On the official vlc git repository (http://git.videolan.org/?p=vlc.git;a=tree) in projects/macosx/framework/ folder there is xcode project MobileVLCKit.xcodeproj for which I assume that is a somewhat usable VLC framework for iOS. Now the problem is that I can't/don't know how to build this project. When I try to build MobileVLCKit.xcodeproj I get an error that says it can't find files inside extras/contrib/hosts/i686-apple-darwin10/ios/ folder. I have looked within that folder (extras/contrib) and managed to create folder (with files) extras/contrib/hosts/i686-apple-darwin10/ with make, but there is no ios folder. So, does anybody knows how to successfully build MobileVLCKit?

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• Core Data inserting objects

  - by Joe

  I'm trying to get my head around Core Data on the iphone. This is code from Apple's 'Navigation based app using Core data' template (method - insertNewObject) // Create a new instance of the entity managed by the fetched results controller. NSManagedObjectContext *context = [fetchedResultsController managedObjectContext]; NSEntityDescription *entity = [[fetchedResultsController fetchRequest] entity]; NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context]; It seems completely counter intuitive to me that the fetched results controller is used when inserting a new object. I changed the code to this: NSEntityDescription *entity = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:managedObjectContext]; NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:managedObjectContext]; which works just as well and does not require access to the fetch request. Am I missing something here? Is there any good reason to use the fetched results controller in the insert method?

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• Interface Builder - XCode link broken with iPad-converted xib

  - by Kenneth Ballenegger

  In porting my app to a universal iPhone / iPad app, the xibs I created by using Interface Builder's "Create iPad Version" will not link to the project properly: They don't pick up on classes and images from the project file. IB tells me that "there is no xcode project associated with this document" with a gray light in the status bar. Yet the xib is in the project, was launched by double-clicking in xcode, and both are open. The old xibs work fine though. I don't understand what could be causing this. So, my question is, how do I restore the link?

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• Why does GANTracker outputs an error "GANTracker.m" not found?

  - by favo

  Hi, I have used the Google Analytics Tracker in a previous iPhone OS project. Everything was working fine and I copy & pasted the GANTracker Library and the Tracker initialization. When starting my new project it tells me: Xcode could not locate source file: GANTracker.m (line: 177) To tell the truth, I don't know where to start to debug this one. I have included the library using #import "GANTracker.h". The error message occurs right within the application didFinishLaunchingWithOptions and does not seem to have any connection to what is really going on. If I set the breakpoint to [window makeKeyAndVisible]; for example and wait a second, it occurs right after that. That makes it look like there is something in the background going on with the GANTracker. The Tracker itself is created a little later by: [[GANTracker sharedTracker] startTrackerWithAccountID:@"xx" dispatchPeriod:10 delegate:nil]; [[GANTracker sharedTracker] trackPageview:@"pageview" withError:nil]; Thank you all in advance for your help!

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• Purchase music from iTunes store without leaving app?

  - by chris.o.

  Hi all, Is anyone aware of a standard way of allowing a user to purchase music from the app store without leaving the app? For instance, if a band has an album for sale on iTunes and then releases an iPhone game featuring the band members, is there a "standard way" to allow the user to buy songs without leaving the app? From what I can tell, there is not and, given that in the example above, the album is not content specifically for the app, it would not qualify for In-App purchase. Any suggestions? Thanks, Chris

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• How to make scrolling through images as fast as Apple's Photos app

  - by clozach

  The Goal — On an iPhone, to browse through several hundred locally-stored jpgs using a UIScrollView. The Problem — Like many others before me, I've tried implementing a scroll view based on Apple's Page Control sample code and found it lacking. The biggest issue I'm currently up against is that the sample code's architecture doesn't seem to scale. With just a few images loaded from disk, everything's fine. Once the number of images gets into the dozens, though, scrolling suffers terribly: the scrollview stutters mid-scroll with each new swipe. The only code I've toyed with that comes even close to being reasonably responsive is Three20, but even there the performance doesn't hold a candle to Photos. For now, I'm just using Three20, but a faster, custom solution would definitely be preferable.

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• Facebook: obtain album id just created with Photos.createAlbum

  - by VansFannel

  Hello. I'm developing an iPhone app that creates a Photo Album to hold the pictures that the user is going to upload. On - (void)request:(FBRequest*)request didLoad:(id)result { I'm trying to obtain the aid returned with this code: else if ([@"Photos.createAlbum" isEqualToString: request.method]) { NSLog(@"[Photos.createAlbum:dialogDidSucceed] succeed"); NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults]; NSString *aid = [[NSString alloc] initWithString: [request.params objectForKey:@"aid"]]; [prefs setObject:aid forKey:_ALBUMID]; [prefs synchronize]; //[prefs release]; [aid release]; if (pendingUploadImage) { [self btnUploadImage]; } } Here said that the aid is returned, but I don't know where. How can I obtain album id?

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• URL Encoding of Characters in a password field

  - by Alavoil

  I am trying to pass login credentials to a PHP script that I have in my iPhone app. When I pull a password with special characters the password is missing certain characters especially the percent sign. I am trying to encode the text but even before I send it, the percent sign is missing. //password_field is a UITextField holding the password: !@#$%^&*() NSString *tmpPass = [password_field.text stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSLog(p_field.text); NSLog(tmpPass); This is what appears in the console: !@#$^&*() [email protected]&*() Is there any reason why it would be dropping the percent sign?

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• Cocoa Core Data - Efficient Related Entities Counts

  - by Gary

  I am working on my first iPhone application and I've hit a wall. I'm trying to develop a 'statistics' page for a three entity relationship. My entities are the following: Department - Name, Address, Building, etc. People - Name, Gender (BOOL), Phone, etc If I have fetched a specific department how do I filter those results and only return people that are Male (Gender == 0)? If I do NSLog(@"%d", [department.people count]); I get the correct number of people in that department so I know I'm in the neighborhood. I know I could re-fetch and modify the predicate each time but with 20+ stats in my app that seems inefficient. Thanks for any advice!

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• Learn Obj-C Memory Management

  - by Joshua Brickner

  I come from a web development background. I'm good at XHTML, CSS, JavaScript, PHP and MySQL, because I use all of those technologies at my day job. Recently I've been tinkering with Obj-C in Xcode in the evenings and on weekends. I've written code for both the iPhone and Mac OS X, but I can't wrap my head around the practicalities of memory management. I understand the high-level concepts but am unclear how that plays out in implementation. Web developers typically don't have to worry about these sorts of things, so it is pretty new to me. I've tried adding memory management to my projects, but things usually end up crashing. Any suggestions of how to learn? Any suggestions are appreciated.

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• Inherit from UINavigationController

  - by d.andreykiv

  Hi. I'm developing iphone app with UITabBarController as main view. Every ViewController in each tab is UINavigationController which must have a same button in leftBarButtonItem. Can I inherit some class from UINavigationController and override it's -(id) initWithRootViewController:(UIViewController *)rootViewController method to realize this ? I made something like this. But this code doesn't work; @implementation MainNavagaionController -(id) initWithRootViewController:(UIViewController *)rootViewController { if (self = [super initWithRootViewController:rootViewController]) { // Set user name title UIBarButtonItem * userNameButton = [[UIBarButtonItem alloc]initWithTitle:@"Title" style:UIBarButtonItemStylePlain target:self action:nil]; self.navigationItem.leftBarButtonItem = userNameButton; [userNameButton release]; } return self; } @end

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• Interface Builder "Simulate Interface" not working

  - by bpapa

  I am using Interface Builder to play around with some ideas. I never noticed that there is a "Simulate Interface" feature which apparently will render the nib in the iPhone simulator. So, I created a view, put one component in there (a Segmented Control), saved it, selected "Simulate Interface", the simulator launched but... nothing rendered in the simulator. Just a black screen. I thought maybe my nib wasn't complete enough, so I've tried it with all of my old nibs and I'm having the same problem with all of them. None of them render in the simulator at all. Is there some trick that I'm missing?

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• Expected specifier-qualifier-list before ... only in classes in a certain folder

  - by funkybro

  Hi Classes in my iPhone project are organised within folders on the filesystem, these correspond to groups (for each folder) in xcode. My problem is that there seems to be a particular class which classes in a particular group/folder cannot make reference to; the compiler complains of "Expected specifier-qualifier-list...". This happens on any class within this group, and also when I create a new class within this group and try and import the offending class like so: #import <Foundation/Foundation.h> #import "MyClass.h" @interface TryingToImport : NSObject { MyClass *myClass; // Expected specifier-qualifier-list before 'MyClass' } Creating an identical class in any other group works OK. I understand this error message is usually due to cyclical import references, I have checked over and over and there don't seem to be any of these. I assume I have inadvertantly configured the offending group to be different to the others in some way but I can't figure out how. Help please!

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• UIViewController prevent view from unloading

  - by Ican Zilb

  When my iPhone app receives a Memory warning the views of UIViewControllers that are not currently visible get unloaded. In one particular controller unloading the view and the outlets is rather fatal. I'm looking for a way to prevent this view from being unloaded. I find this behavior rather stupid - I have a cache mechanism, so when a memory warning comes - I unload myself tons of data and I free enough memory, but I definitely need this view untouched. I see UIViewController has a method 'unloadViewIfReloadable', which gets called when the Memory Warning comes. Does anybody know how to tell Cocoa Touch that my view is not reloadable? Any other suggestions how to prevent my view from being unloaded on Memory Warning? Thanks in advance

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• Resources check

  - by Chris

  hey I am frequently uploading my XCode iPhone projects to an svn repository to be build on another machine. My problem is that when I add resources to my project sometimes I forget to add the resource as relative to the project. I know one answer is to be more careful (not easy when your tired!) but if there was a way to run a script to check my resource paths are relative when I build and warn me if they are not it would be a great time saver for me. How would I go about doing this? Thanks Chris

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• Inserting nil Values into Sqlite Database?

  - by Chris

  I am working on an iPhone App where I am pulling data from an XML file and inserting it into a sqlite database located in the App. I am able to successfully do this process, but it appears that if I try to sqlite3_bind_text with a NSString that has a value of "nil", the App quickly dies. This is an example of code that fails: (modified for this example) // idvar = 1 // valuevar = nil const char *sqlStatement = "insert into mytable (id, value) VALUES(?, ?)"; sqlite3_stmt *compiledStatement = nil; sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL); sqlite3_bind_int(compiledStatement, 1, [idvar intValue]);; sqlite3_bind_text(compiledStatement, 2, [valuevar UTF8String], -1, SQLITE_TRANSIENT);

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• How do I get selected background color from SecondView to pass to FirstView?

  - by rob

  I am going insane! This is a simple app with two Views. FirstView is a text field with info button to flip to SecondView. In SecondView I have 6 buttons for background color choice. When button is pushed the color of background changes perfectly but cannot make it also change background color for FirstView. Any help would be GREAT! Thanks! I am using Objective C class working on a iPhone app. Sorry new at this. The SecondView acts almost like a settings page in the fact that when a button is pushed the background color changes to the button color. I need it so when I push the "back" button to go back to FirstView the background color has also changed to that color choice. Been thru sooooooooo many tutorials and codes that now I am totally lost......... Thanks again!

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• using core data with web services

  - by Jayshree

  Hi. i am a noob in xcode. I am developing an iphone app where i need to send and receive data from a web service. And i need to store them temporarily in my app. i dont want to use sqlite. so i was wondering if i should use core data for this purpose. I read some articles but i still dont have a clear picture of how to do it, coz i have used core data only with sqlite. I want to do the following things : Will receive table data from a web service. Have to perform certain calculations on those fields. Will send the data back in xml format to the server. How do i convert the xml data into int, date or any other data type? and how do i store it in managed data objects? Can anyone please help me with this??? thnx for your time.

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• Binding data to scroll view

  - by Rahul Varma

  Hi, I am new to iphone dev. I have a Label and a scroll view. I am trying to get data from url and bind it to label and a scroll view. I am able to bind the data to label by using... UrlValues *asana=[[data yoga]objectAtIndex:i]; self.AsanaName.text = [asana asanatitle]; Similarly i want to bind some other data in the url to a scroll view. The data i want to bind is 4 or 5 sentences. So, can anyone help me how to do it... Any sample code will be really helpful... Thanks

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• How to access the price of a product in SKPayment?

  - by favo

  I am having an In-App-Purchase for an iPhone app. I want to display the price in the users local currency in a UILabel. For this I need the price & currency in a variable. How can I get the price including the currency using SKPayment? (If SKPayment is correct for this use.) I'm instantiating the product using: SKPayment *payment = [SKPayment paymentWithProductIdentifier:@"Identifier"]; Thank you all in advance for your feedback!

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• Using Vim on the ipad... Any tips?

  - by pax1728

  I'm itching to program on my ipad. With the iSSH app I was able to log on to my university's server and even open an X server window. Unfortunately, the experience within iSSH is still rather clumsy. When using vim, the bottom line is hidden by the keyboard. Does anyone have any experience with SSH connections and the ipad or iphone? Are there better applications to use? I would prefer not to jailbreak my ipad.

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• iPad book / cartoon contents plus Marvel like cartoons

  - by anthony

  Hi, I want to create and sell book / cartoons by individual episodes. What's the best way to to this? iBook from the apple store tends to sell by entire volume / book... I see an App from Marvel sells its contents by individual episodes, but I don't want to create / maintain shopping carts and stuff. (I am assuming iPad / iPhone users are downloading each cartoon episodes by their Marvel servers) I want to utilize Apple iBook / iTune store... Second questions: Is Marvel-like cartoons all jpg pictures showing frame by frame? Thanks in advance!!!

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• iPhoneOS SDK - Remove Corner Rounding from views (iPad problem)

  - by norskben

  Hi Guys This might be a little bit picky, but in the iPad SplitViewController setup, there are 2 views. Each of the views has a very small black corner rounding. (This is probably the same with iPhone apps too). This rounding is visible in the image below. What I would like to do is remove the black rounding, so the UI doesnt get these two little bumps along the bottom. Has anyone done this, or know how to? -Its surely possible. Hopefully some one has seen this before. Thanks Image Link Mirror

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• Xcode: Using a custom framework

  - by Robert

  The error I'm getting: in /Users/robert/Documents/funWithFrameworks/build/Debug-iphonesimulator/funWithFrameworks.framework/funWithFrameworks, can't link with a main executable Cliff notes: trying to include framework doesn't want to link More detail: I'm developing for a mobile device... hint, hint using Xcode and I'm trying to make my own custom framework which I can include from another application. So far, I've done the following: Create a new project; an iPhone OS window based app. Go to target info- under packaging, change the wrapper extension from app to framework Go to Action-new build phase - copy headers. Change roles of headers to 'public' From my application, I add the framework to the frameworks group.

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• NSDateFormatter, am I doing something wrong or is this a bug?

  - by rustyshelf

  I'm trying to print out the date in a certain format: NSDate *today = [[NSDate alloc] init]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyyMMddHHmmss"]; NSString *dateStr = [dateFormatter stringFromDate:today]; If the iPhone is set to 24 hour time, this works fine, if on the other hand the user has set it to 24 hour time, then back to AM/PM (it works fine until you toggle this setting) then it appends the AM/PM on the end even though I didn't ask for it: 20080927030337 PM Am I doing something wrong or is this a bug with firmware 2.1? Edit 1: Made description clearer Edit 2 workaround: It turns out this is a bug, to fix it I set the AM and PM characters to "": [dateFormatter setAMSymbol:@""]; [dateFormatter setPMSymbol:@""];

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