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  • Recording custom overlay on iPhone

    - by Marc
    Hi all, I'm interested in recording a video with a custom overlay which would end up in the video itself. They could be UIImage or even better, an OpenGL viewport, is there even such possibility right now on any iPhone devices/SDK ? Thanks

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  • Should we point to an NSManagedObject entity with weak instead of strong pointer?

    - by Jim Thio
    I think because NSManagedObject is managed by the managedObject context the pointer should be weak. Yet it often goes back to 0 in my cases. for (CategoryNearby * CN in sorted) { //[arrayOfItems addObject:[NSString stringWithFormat:@"%@ - %d",CN.name,[CN.order intValue]]]; NearbyShortcutTVC * tvc=[[NearbyShortcutTVC alloc]init]; tvc.categoryNearby =CN; // tvc.titleString=[NSString stringWithFormat:@"%@",CN.name]; // tvc.displayed=CN.displayed; [arrayOfItemsLocal addObject:tvc]; //CN PO(tvc); PO(tvc.categoryNearby); while (false); } self.arrayOfItems = arrayOfItemsLocal; PO(self.categoriesNearbyInArrayOfItems); [self.tableViewa reloadData]; ... Yet somewhere down the line: tvc.categoryNearby becomes nil. I do not know how or when or where it become nil. How do I debug this? Or should the reference be strong instead? This is the interface of NearbyShortcutTVC by the way @interface NearbyShortcutTVC : BGBaseTableViewCell{ } @property (weak, nonatomic) CategoryNearby * categoryNearby; @end To make sure that we're talking about the same object I print all the memory addresses of the NSArray They're both the exact same object. But somehow the categoryNearby property of the object is magically set to null somewhere. self.categoriesNearbyInArrayOfItems: ( 0x883bfe0, 0x8b6d420, 0x8b6f9f0, 0x8b71de0, 0xb073f90, 0xb061a10, 0xb06a880, 0x8b74940, 0x8b77110, 0x8b794e0, 0x8b7bf40, 0x8b7cef0, 0x8b7f4b0, 0x8b81a30, 0x88622d0, 0x8864e60, 0xb05c9a0 ) self.categoriesNearbyInArrayOfItems: ( 0x883bfe0, 0x8b6d420, 0x8b6f9f0, 0x8b71de0, 0xb073f90, 0xb061a10, 0xb06a880, 0x8b74940, 0x8b77110, 0x8b794e0, 0x8b7bf40, 0x8b7cef0, 0x8b7f4b0, 0x8b81a30, 0x88622d0, 0x8864e60, 0xb05c9a0 )

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  • [iPhone app] Detecting which key has been pressed in UITextField

    - by Dough
    Hi, I have an UITextField object in my view and want to launch a method when user press backspace button and textField is empty. First I have to do is to create a cursor storing text length, so when cursor changes from 1 to 0 there is nothing to do. The only way to launch the method is when text length is 0 - press backspace - remain to 0. How to catch the event of pressing the backspace key in my UITextField ? Thanks in advance !

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  • How to unit tests functions which return results asyncronously in XCode?

    - by DevDevDev
    I have something like - (void)getData:(SomeParameter*)param { // Remotely call out for data returned asynchronously // returns data via a delegate method } - (void)handleDataDelegateMethod:(NSData*)data { // Handle returned data } I want to write a unit test for this, how can I do something better than NSData* returnedData = nil; - (void)handleDataDelegateMethod:(NSData*)data { returnedData = data; } - (void)test { [obj getData:param]; while (!returnedData) { [NSThread sleep:1]; } // Make tests on returnedData }

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  • iPhone Tab Bar application crash

    - by Mark Szymanski
    I have an application that uses a tab bar and whenever it launches it crashes and gives me the following error and stack trace: 2010-04-22 16:15:03.390 iCrushCans[59858:207] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIWindow 0x3e051a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key rootViewController.' 2010-04-22 16:15:03.392 iCrushCans[59858:207] Stack: ( 29680731, 2425423113, 29839809, 305768, 304309, 2957847, 4641908, 29583663, 4636459, 4644727, 2805842, 2844630, 2833204, 2815615, 2842721, 37776729, 29465472, 29461576, 2809365, 2846639 ) Thanks in advance!

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  • Core Data and iTunes File Sharing - Move/hide the .sqlite file on app update?

    - by Eric
    I have an iPad app that uses Core Data for data storage. I would like to enable file sharing in iTunes and I don't really want the users to be able to delete or modify the .sqlite file. Can I move the file to a different, hidden directory? Alternatively, could the file be made read-only? I wouldn't mind users having access to the file as long as it couldn't be changed. I suspect there is a trivial solution that is escaping me at the moment.

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  • iPhone animated banner : which framework to use

    - by Julien
    Hi folks, I'm willing to create a little frame to display animated ads in my app. It could be simple little animations, or "3D" transition between ads, or combination of both. I'm not familiar with graphic frameworks, I just used CoreGraphics, which I think is not optimized for that. I thought of OpenGL, but maybe that's too much and takes too much ressources just for this little thing. What do you think ?

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  • reloading table

    - by edie
    Hi... I've have a table view that consist of item list that depends on the item that were purchased using in app purchasing. My question was how can I reload the tableView when the purchasing was completed/(or when new item was added on my list). The response of the storekit takes time to complete. Are there anyways to tell the app that the purchasing was completed and new item was added on my list so that I can reload my tableView. At this time I reloading my table view by adding [myTableView reloadData] in viewWillAppear method. But what if the user was already viewing the tableView, I can't reload the tableView because the viewWillAppear had passed. thanks...

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  • How do I make an About window the front-most window in a Cocoa application with no UI?

    - by mipadi
    I'm building a Cocoa application that runs as an item in the status bar. This application has an About window and an item to activate that about window, using the standard Cocoa mechanism for doing so (-[NSApplication orderFrontStandardAboutPanel:]). Naturally this is all hooked up automagically. It works great except for one thing: unlike most About windows, it shows up underneath all other windows, rather than on top. I believe this is because the application does not have a UI, so all its windows are automatically beneath other windows. Is there a way I can hook into the NSApplication mechanism for displaying the About window so I can send it to the front? I've poked around in the docs for NSApplication, but there's no way to get a reference to the About window that I can see so that I can make it appear on top.

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  • Save NSWindow Size on Resize & Close For User

    - by incarna
    I've noticed that all applications on OS X seem to save the size you set it at. The next time you open it it's typically in the same position and size. I'm making an app and I've noticed that after resizing, if I launch the application again it's just the size of what I've set in Xcode 4's IB and not the size that I resized it to on launch. Do I have to manually save the window size each time its changed? Or is there an easier way to do this through IB? (My window does have a minimum size set if that changes anything.)

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  • How should I handle header files in a bundle?

    - by ldiqual
    I want to develop a program that relies on plugins (here: loadable bundles) to work. Multiple plugins are asked to use the same AFNetworking ressource to make network requests. However, I don't know where to put AFNetworking and CustomPluginProtocol headers. Here is how my program structure looks like for now: MyApp.xcodeproj - AFNetworking - Header.h - Plugins - Plugin1.xcodeproj - PrincipalClass.m - Plugin2.xcodeproj - PrincipalClass.m - Classes - CustomPluginProtocol.h - MainClass.m Of course, every principalClass from PluginN complies to the CustomPluginProtocol. Do the headers have to be copied in each bundle ? Can I just include the main program AFNetworking headers from my plugins ? If so (and that's what I do for now), I don't have any completion. How can I get it ? Edit Ok, so maybe I wasn't clear in my question. I want my plugins to use sources from the main application, let's say CommonClass.m and CommonClass.h. Do the plugins need CommonClass.h in their bundle, and if not, how do I enable completion when I'm in the plugin scope ?

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  • Problem with parsing XML with iPhone app

    - by zp26
    Hi, I have a problem with a xml parsing. I have create a class for parsing. The xmlURL is correct (testing it from debug) but when i call the method parse the variable success become FALSE and a errorParsing is "NSXMLParserErrorDomain". Can you help me? My code is below. #import "xmlParser.h" #import"Posizione.h" @implementation xmlParser @synthesize arrayPosizioniXML; NSString *tempString; Posizione *posizioneRilevata; - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if([tempString isEqualToString:@"name"]) posizioneRilevata.nome = string; else if([tempString isEqualToString:@"x"]) posizioneRilevata.valueX = [string floatValue]; else if([tempString isEqualToString:@"y"]) posizioneRilevata.valueY = [string floatValue]; else if([tempString isEqualToString:@"z"]) posizioneRilevata.valueZ = [string floatValue]; else if([tempString isEqualToString:@"/posizione"]) [arrayPosizioniXML addObject:posizioneRilevata]; } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { //[textArea setText:[[NSString alloc] initWithFormat:@"%@\nFine elemento: %@",textArea.text,elementName]]; } - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { if ([elementName isEqualToString:@"name"]){ tempString = @"name"; NSLog(@"ok"); } else if([elementName isEqualToString:@"x"]){ tempString = @"x"; } else if([elementName isEqualToString:@"y"]) { tempString = @"y"; } else if([elementName isEqualToString:@"z"]) { tempString = @"z"; } else if([elementName isEqualToString:@"/posizione"]) { tempString = @"/posizione"; } } -(BOOL)avviaParsing{ //Bisogna convertire il file in una NSURL altrimenti non funziona NSLog(@"zp26 %@",path); NSURL *xmlURL = [NSURL fileURLWithPath:path]; // Creiamo il parser NSXMLParser *parser = [[ NSXMLParser alloc] initWithContentsOfURL:xmlURL]; // Il delegato del parser e' la classe stessa (self) [parser setDelegate:self]; //Effettuiamo il parser BOOL success = [parser parse]; //controlliamo come è andata l'operazione if(success == YES){ //parsing corretto return TRUE; } else { NSError *errorParsing = [[NSError alloc]init]; errorParsing = [parser parserError]; //c'è stato qualche errore... return FALSE; } // Rilasciamo l'oggetto NSXMLParser [parser release]; } -(id)init { self = [super init]; if (self != nil) { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoryPath = [paths objectAtIndex:0]; path = [documentsDirectoryPath stringByAppendingPathComponent:@"filePosizioni.xml"]; posizioneRilevata = [[Posizione alloc]init]; tempString = [[NSString alloc]init]; } return self; } @end @implementation AccelerometroViewController -(BOOL)caricamentoXML{ xmlParser *parser; parser = [[xmlParser alloc]init]; if([parser avviaParsing]){ [arrayPosizioni addObjectsFromArray:parser.arrayPosizioniXML]; return TRUE; } else return FALSE; } - (void)viewDidLoad { [super viewDidLoad]; if([self caricamentoXML]){ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Caricamento Posizioni da Xml" message:@"Posizione caricata con successo" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil]; [alert show]; [alert release]; } else{ UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Caricamento Posizioni da Xml" message:@"Posizione non caricate" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil]; [alert show]; [alert release]; } } @end

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  • How can I display the camera view in the main window in real time?

    - by Mongrel Warfare
    I'm trying to make an augmented reality application with a waypoint structure, like Yelp, and I'm wondering how to set up my main view so that it displays the camera view on the whole screen. I've heard of using the UIImagePickerController Class, but I'm unsure how to manipulate the code so that it doesn't actually take a picture, but just stays in the view mode. Any help would be appreciated, thanks!

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  • EXC_MEMORY_ACCESS when trying to delete from Core Data ($cash solution)

    - by llloydxmas
    I have an application that downloads an xml file, parses the file, and creates core data objects while doing so. In the parse code I have a function called 'emptydatacontext' that removes all items from Core Data before creating replacements items from the xml data. This method looks like this: -(void) emptyDataContext { NSFetchRequest * allCon = [[NSFetchRequest alloc] init]; [allCon setEntity:[NSEntityDescription entityForName:@"Condition" inManagedObjectContext:managedObjectContext]]; NSError * error = nil; NSArray * conditions = [managedObjectContext executeFetchRequest:allCon error:&error]; DebugLog(@"ERROR: %@",error); DebugLog(@"RETRIEVED: %@", conditions); [allCon release]; for (NSManagedObject * condition in conditions) { [managedObjectContext deleteObject:condition]; } // Update the data model effectivly removing the objects we removed above. //NSError *error; if (![managedObjectContext save:&error]) { DebugLog(@"%@", [error domain]); } } The first time this runs it deletes all objects and functions as it should - creating new objects from the xml file. I created a 'update' button that starts the exact same process of retrieving the file the proceeding with the parse & build. All is well until its time to delete the core data objects. This 'deleteObject' call creates a "EXC_BAD_ACCESS" error each time. This only happens on the second time through. Captured errors return null. If I log the 'conditions' array I get a list of NSManagedObjects on the first run. On the second this log request causes a crash exactly as the deleteObject call does. I have a feeling it is something very simple I'm missing or not doing correctly to cause this behavior. The data works great on my tableviews - its only when trying to update I get the crashes. I have spent days & days on this trying numerous alternative methods. Whats left of my hair is falling out. I'd be willing to ante up some cash for anyone willing to look at my code and see what I'm doing wrong. Just need to get past this hurdle. Thanks in advance for the help!

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  • Optimize a views drawing code

    - by xon1c
    Hi, in a simple drawing application I have a model which has a NSMutableArray curvedPaths holding all the lines the user has drawn. A line itself is also a NSMutableArray, containing the point objects. As I draw curved NSBezier paths, my point array has the following structure: linePoint, controlPoint, controlPoint, linePoint, controlPoint, controlPoint, etc... I thought having one array holding all the points plus control points would be more efficient than dealing with 2 or 3 different arrays. Obviously my view draws the paths it gets from the model, which leads to the actual question: Is there a way to optimize the following code (inside the view's drawRect method) in terms of speed? int lineCount = [[model curvedPaths] count]; // Go through paths for (int i=0; i < lineCount; i++) { // Get the Color NSColor *theColor = [model getColorOfPath:[[model curvedPaths] objectAtIndex:i]]; // Get the points NSArray *thePoints = [model getPointsOfPath:[[model curvedPaths] objectAtIndex:i]]; // Create a new path for performance reasons NSBezierPath *path = [[NSBezierPath alloc] init]; // Set the color [theColor set]; // Move to first point without drawing [path moveToPoint:[[thePoints objectAtIndex:0] myNSPoint]]; int pointCount = [thePoints count] - 3; // Go through points for (int j=0; j < pointCount; j+=3) { [path curveToPoint:[[thePoints objectAtIndex:j+3] myNSPoint] controlPoint1:[[thePoints objectAtIndex:j+1] myNSPoint] controlPoint2:[[thePoints objectAtIndex:j+2] myNSPoint]]; } // Draw the path [path stroke]; // Bye stuff [path release]; [theColor release]; } Thanks, xonic

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  • updating plist file on launch of application

    - by Josh Turnage
    Hi. I have an app that reads in a plist file from the resources folder. I have looked for about 5 hours for a solution to hosting my plist file on my freewebs acount and have the application update the plist file on launch. Can anyone help me please. I will post my code if you ask. I am just not sure what you need to see now.

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  • UIScrollView Custom View rotation problem

    - by Markus
    I have a ScrollView with a Custom View. Now i have the problem with the rotation, the view has after the rotation not the correct frame pos / size. How can i call the CustomView after rotation for a reposition and resize the frame and content?! - (void)setupPage { NSUInteger nimages = 0; CGFloat cx = 0; for (; ; nimages++) { if (nimages == list.count) { break; } CustomStepView *stepView = [[CustomStepView alloc] initWithFrame:CGRectZero]; stepView.tag = nimages; if([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown) { stepView.frame = CGRectMake(cx, 0.0 , 768.0f, 926.0f); cx += 768.0; } else { stepView.frame = CGRectMake(cx, 0.0 , 1024.0f, 670.0f); cx += 1024.0; } [scrollView addSubview:stepView]; [stepView release]; } self.pageControl.numberOfPages = nimages; }

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  • GameKit server disconnect makes session invalid

    - by Markus
    Hi everyone, I'm trying to build a 4 player multiplayer game using GameKit. I tried many things and I'm currently using client/server mode, meaning that I have 1 session in GKSessionModeServer and 3 other sessions connecting to this one in GKSessionModeClient. My goal is, that when a user leaves the game or gets disconnected for whatever reason, that the others can continue their game. So far this works if any of the Clients leave the game, but if the Sevrer leaves the game, send and receive calls are not reaching the other peers anymore. I tried the same with 4 peers in GKSessionModePeer with the same result (where the player who accepts connections cannot quit). Does anyone had better success in making this work? Any help is highly appreciated. Thanks!

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  • Save file in a different location in iPhone App

    - by zp26
    Hi, I have a problem. My proget create a xml file. In the iPhone this file was store in the NSDocumentDirectory. I wanna save this file in another directory like Desktop(where there are the apps) or another visible folder. Thanks. This is my code: -(void)saveInXML:(NSString*)name:(float)x:(float)y:(float)z{ //NSDocumentDirectory put the file in the app directory NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectoryPath = [paths objectAtIndex:0]; NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"filePosizioni.xml"]; NSFileHandle *myHandle; NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *titoloXML = [NSString stringWithFormat:@"File Xml delle posizioni del iPhone"]; NSString *inizioTag = [NSString stringWithFormat:@"\n\n\n<posizione>"]; NSString *tagName = [NSString stringWithFormat:@"\n <name>%@</name>", name]; NSString *tagX = [NSString stringWithFormat:@"\n <x>%f</x>", x]; NSString *tagY = [NSString stringWithFormat:@"\n <y>%f</y>", y]; NSString *tagZ = [NSString stringWithFormat:@"\n <z>%f</z>", z]; NSString *fineTag= [NSString stringWithFormat:@"\n</posizione>"]; NSData* dataTitoloXML = [titoloXML dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataInizioTag = [inizioTag dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataName = [tagName dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataX = [tagX dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataY = [tagY dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataZ = [tagZ dataUsingEncoding: NSASCIIStringEncoding]; NSData* dataFineTag = [fineTag dataUsingEncoding: NSASCIIStringEncoding]; if(![fileManager fileExistsAtPath:filePath]) [fileManager createFileAtPath:filePath contents:dataTitoloXML attributes:nil]; myHandle = [NSFileHandle fileHandleForUpdatingAtPath:filePath]; [myHandle seekToEndOfFile]; [myHandle writeData:dataInizioTag]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataName]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataX]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataY]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataZ]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; [myHandle writeData:dataFineTag]; NSLog(@"writeok"); [myHandle seekToEndOfFile]; NSLog(@"zp26 %@",filePath); }

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  • Converting RGB values to CMYK

    - by llk
    Hi all, I have RGB values that I need to convert into CMYK values. I'm using the iPhone SDK to try and do this. I have tried a couple of things, but cannot either get the values to be anything other than 0 or 1, or the K element is completely wrong (showing up as a negative number). Any help would be a life saver! Thanks in advance!

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  • Scroll view to bottom while keyboard is hiding

    - by Manu
    Hi! I'm using a scroll view to move my view and show certain text fields (that otherwise would be hidden) when the keyboard shows. I basically resize the scroll view to make room for the keyboard, and then scroll up the view smoothly with "scrollRectToVisible", which works perfectly. After that, I can scroll and edit the rest of the text fields without lowering the keyboard, which is what I intend. The problem comes when I want to hide the keyboard again. I have been able to lower the keyboard and scroll down the view to its original position without a problem, but I have been unable to make that transition smooth. At the moment I use the following: - (void)keyboardWillHide: (NSNotification *)notif { CGRect topRect = CGRectMake(0, 0, 1, 1); [scrollview scrollRectToVisible:topRect animated:YES]; scrollview.frame = CGRectMake(0, 0, scrollviewWidth, scrollviewHeight); } I create a CGRect at the top, which I then move into view with "scrollRectToVisible". That works fine and commences the scrolling right when the keyboard is hiding (I use "keyboardWillHide" and not "keyboardDidHide" because the scroll view frame is still missing its lower part). The problem comes when I resize the scroll view frame back to its original dimensions (which I need to do), because then the scrolling is interrupted and the view drops to the bottom suddenly (as there is nothing else to scroll). This causes a glitch, which is why I cannot complete the transition smoothly. Any ideas on how could I lower the keyboard while scrolling the view down smoothly? Should I be scrolling up a bigger view, instead of resizing it? That way I would not have to restore the scroll view frame dimensions when lowering the keyboard, or would I? Thanks very much in advance!

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  • How to find the only UILabel in a view and hide it?

    - by tarnfeld
    I am adding a UILabel as a subview to a UIView and sometime later I want to hide it. It is assigned to a variable but I don't think setting the variables property Hidden after it's been added to the view will work (well it doesn't seem to anyway). Is there a way to loop through the subviews in a view and then find the one that has a specific tag or is of type UILabel that I could then remove?

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