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  • iphone app hangs in AppDelegate (?)

    - by d_CFO
    No nib/IB, so I've inserted "myAppDelegate" in main and deleted the reference to main.xib in info.plist. Debug continues nicely through all five tab controllers; they seem to have gotten properly loaded into the nav controller. In fact, control passes out of the last "}" in applicationDidFinishLaunching. But there was no (visible) response back at [window addSubview:[tabBarController view]]; and [window makeKeyAndVisible]; statements, much less to the loadView within the first tab (program execution never gets there). The last line is, UIApplication _performInitializationWithURL:sourceBundleID:]. I missed a step? I executed a step improperly?

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  • iphone dev - how to catch exception 'NSRangeException'

    - by Brian
    In my app I try to scroll a UITableView to the top once after I updated the content of the table. However, under some circumstance, my table is EMPTY. So I got the following exception: Terminating app due to uncaught exception 'NSRangeException', reason: '-[UITableView scrollToRowAtIndexPath:atScrollPosition:animated:]: row (0) beyond bounds (0) for section (0).' how can I catch this exception? I tried NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0]; if (indexPath != nil) { [EventTable scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES]; } but it doesn't catch the exception because indexPath is not nil.

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  • UINavigationController not working under ARC in iPhone

    - by user1811427
    I have creared a new project "Empty Application" template in Xcode 4.3, it is having only two classes AppDelegate.h & .m I cheaked with ARC to use automatic reference count while creating the app. I added two new files "RootViewController" & "NewProjectViewControllers". I implemented code to set navigation controller as follows in AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // Override point for customization after application launch. rootViewController = [[MainViewController alloc] init]; UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:rootViewController]; [self.window addSubview:navigation.view]; self.window.backgroundColor = [UIColor whiteColor]; [self.window makeKeyAndVisible]; return YES; } and in hte home view (Root view controller) implemented as follows - (void)viewDidLoad { [super viewDidLoad]; self.title = @"Projects"; UINavigationBar *navigationBar = [self.navigationController navigationBar]; [navigationBar setTintColor: [UIColor colorWithRed:10/255.0f green:21/255.0f blue:51/255.0f alpha:1.0f]]; //To set the customised bar item UIButton *rightBarBtn = [UIButton buttonWithType:UIButtonTypeCustom]; [rightBarBtn setBackgroundImage:[UIImage imageNamed:@"plus_new.png"] forState:UIControlStateNormal]; rightBarBtn.frame=CGRectMake(0.0, 100.0, 30.0, 30.0); [rightBarBtn addTarget:self action:@selector(addProject) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem* rightBarItem = [[UIBarButtonItem alloc] initWithCustomView:rightBarBtn]; self.navigationItem.rightBarButtonItem = rightBarItem; // Do any additional setup after loading the view from its nib. } - (void) addProject { NewProjViewController *editProject = [[NewProjViewController alloc] init]; [self.navigationController pushViewController:editProject animated:YES]; NSLog(@"xxxxxxxxxxxxxxx"); } But since i used ARC the navigation may dealoc immediately and it doesn't work, All the actions in method works except push to the next view if i do same thing with out ARC it works fine How to resolve this issue..? Thanks in advance

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  • reloading a table view with an Iphone app

    - by ajaywillis
    I am using a table view controller that makes a call to a web service and then parses the XML and display it in the table view. The problem is that the first time that I load it the XML apparently is not finished parsing before the view is shown. How can I reload the view after the XML is done parsing?

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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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  • How to control overlapping Alpha fades on iPhone...

    - by ReduxDJ
    I have two animation methods, basically the just repeat... How do I prevent them from overlapping and flickering, is there a convenient way to do this? Thanks, -(void) doPowerChangeAnimUp { powerIconChange .alpha = 0; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDidStopSelector:@selector(animationDidStop:)]; [UIView setAnimationDelegate:self] ; [UIView setAnimationDuration:2]; [powerIconChange setAlpha:1]; [UIView commitAnimations]; } -(void)animationDidStop:(NSString *)animationID { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDelegate:self] ; [UIView setAnimationDidStopSelector:@selector(doPowerChangeAnimUp)]; [UIView setAnimationDuration:2]; [powerIconChange setAlpha:0]; [UIView commitAnimations]; }

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  • How to use TabBar in a iPhone Navigation template

    - by iPhoneDev
    My app contain 20 to 25 views. Only one view required TabBar. User need to navigate 7 to 8 views, then only TabBar view will appear. So considering this I have started with Navigation Based template. But when I am creating TabBar view with Tabbar Controller, navigation is not working properly (it might be because its NavigationBased tamplate). Please help me, I am highly confused :(

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  • iPhone app launch times and Core Data migration

    - by sehugg
    I have a Core Data application which I plan to update with a new schema. The lightweight migration seems to work, but it takes time proportional to the amount of data in the database. This occurs in the didFinishLaunchingWithOptions phase of the app. I want to avoid <app> failed to launch in time problems, so I assume I cannot keep the migration in the didFinishLaunchingWithOptions method. I assume the best method would involve performing the migration in a background thread. I assume also that I'd need to defer loading of the main ViewController until the loading completes to avoid using the managedObjectContext until initialization completes. Does this make sense, and is there example code (maybe in Apple sample projects) of this sort of initialization?

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  • How to put Google adsense in iPhone application?

    - by oksk
    Hi all. I have a question about adsense. I want to put Google adsense in my application to be developed. But after testing my code, It wasn't shown. this is my code self.webView.userInteractionEnabled = NO; NSMutableString *manageableHTML = [[[NSMutableString alloc] init] autorelease]; [manageableHTML appendFormat:@"<html><head></head>"]; [manageableHTML appendFormat:@"<body>"]; [manageableHTML appendFormat:@"<script type=\"text/javascript\"><!--"]; [manageableHTML appendFormat:@"window.googleAfmcRequest = {"]; [manageableHTML appendFormat:@"client: 'ca-mb-pub-7564235160823935',"]; [manageableHTML appendFormat:@"ad_type: 'text_image',"]; [manageableHTML appendFormat:@"output: 'html',"]; [manageableHTML appendFormat:@"channel: '2052458338',"]; [manageableHTML appendFormat:@"format: '320x50_mb',"]; [manageableHTML appendFormat:@"oe: 'utf8',"]; [manageableHTML appendFormat:@"color_border: '336699',"]; [manageableHTML appendFormat:@"color_bg: 'FFFFFF',"]; [manageableHTML appendFormat:@"color_link: '0000FF',"]; [manageableHTML appendFormat:@"color_text: '000000',"]; [manageableHTML appendFormat:@"color_url: '008000',"]; [manageableHTML appendFormat:@"};"]; [manageableHTML appendFormat:@"//--></script>"]; [manageableHTML appendFormat:@"<script type=\"text/javascript\" "]; [manageableHTML appendFormat:@"src=\"http://pagead2.googlesyndication.com/pagead/show_afmc_ads.js\"></script>"]; [manageableHTML appendFormat:@"</body></html>"]; [self.webView loadHTMLString:manageableHTML baseURL:nil]; [self.view addSubview:self.webView]; Bofore testing, this javascript code are well operated in my google blog. I found that this code work at only mobile device. and I checked it through safari of my ipod touch. (It works well.) But Checking in the application, I don't see adsense. what is something wrong?

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  • iPhone: How to Determine Average Light/Dark of an Area of an UIImage

    - by TechZen
    I need to place labels with a transparent background over a variable-content UIImage. Readability will vary significantly depending on the relationship between the color of the label's text and the color/luminosity of the area of the image displayed under the label. Since the image will be constantly changing, the color of the label's text needs to change in sync. I have found several techniques for determining the color, perceived luminosity etc of a single pixel. However, I need to rather quickly (while a view loads) determine the rough perceived color/luminosity of an area of the UIImage under the frame of the UILabel. I presume I will also need to measure the alpha because the same color/luminosity looks different at different alpha values. Is there a way to calculate such a value for an area? Will I be reduced to simply summing pixels? If it comes to that, is there an algorithm to accomplish this? I've thought of two possible approaches: Perform some "folding" operations i.e. combining pixels from one half of the area to the other half. Then repeat until I get a single value. Would this be practical? How would you logically combine pixels to average their perceived color/luminosity? Sample a statistically significant number of pixels in the area and then combine them (somehow) to get a rough measure. I think this problem comes up a lot these days with people being so found of customizing backgrounds. Seems like something that would be worth my time to bang out a category or class to handle this and then share it around.

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  • iPhone switching views without first view being reset

    - by user298261
    Heya! I'm making a role-playing game, and I want to have a Map View and a Battle Screen. With the possibility of other screens as well. I thought the best way to achieve this was to use multiple NIB files. When I prototyped this by have one view that creates content, switches to the next view, and then back, the content on the original view was reset. How do I make it so that the first view doesn't reset the data each time it's loaded? Thanks!

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  • Implementing Tagging using Core Data on the iPhone

    - by Jonathan Penn
    I have an application that uses CoreData and I'm trying to figure out the best way to implement tagging and filtering by tag. For my purposes, if I was doing this in raw SQLite I would only need three tables, tags, item_tags and of course my items table. Then filtering would be as simple as joining between the three tables where only items are related to the given tags. Quite straightforward. But, is there a way to do this in CoreData and utilizing NSFetchedResultsController? It doesn't seem that NSPredicate give you the ability to filter through joins. NSPredicate's aren't full SQL anyway so I'm probably barking up the wrong tree there. I'm trying to avoid reimplementing my app using SQLite without CoreData since I'm enjoying the performance CoreData gives me in other areas. Yes, I did consider (and built a test implementation) diving into the raw SQLite that CoreData generates, but that's not future proof and I want to avoid that, too. Has anyone else tried to tackle tagging/filtering with CoreData in a UITableView with NSFetchedResultsController

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  • iPhone Development - calling external JSON API (will Apple reject?)

    - by RPM1984
    Ok guys, so im new to iPhone development, so apologies if this is a silly question, but before i actually create my app i want to know if this is possible, and if Apple will reject this. (Note this is all theoretical) So i'd have a API (.NET) that runs on a cloud server somewhere and can return HTML/JSON/XML. I'll have a website that can access this API and allow customers to do some stuff (but this is not important for this question). I would then like my iPhone app to make a call to this API which would return JSON data. So my iPhone app might make a call to http://myapp/Foos which would return a JSON string of Foo objects. The iPhone app would then parse this JSON and do some funky stuff with it. So, that's the background, now the questions: Is this possible? (that is, call an external cloud API over HTTP, parse JSON response?) What are the chances of Apple rejecting this application (because it would be calling a non-Apple API) Are there any limitations (security, libraries, etc) on the iPhone/Objective-C/Cocoa that might hinder this solution? On this website, they seem to be doing exactly what im asking. Thoughts, suggestions, links would be greatly appreciated...

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  • iPhone Core Data - Access deep attributes with to many relationships

    - by ncohen
    Hi everyone, Let say I have an entity user which has a one to many relationship with the entity menu which has a one to many relationship with the entity meal which has a many to one relationship with the entity recipe which has a one to many relationship with the entity element. What I would like to do is to select the elements which belong to a particular user (username = myUsername) and particular menu*s* (minDate < menu.date < maxDate). Does anyone have an idea how to get them? Thanks

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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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  • Basic drawing with Quartz 2D on iPhone

    - by wwrob
    My goal is to make a program that will draw points whenever the screen is touched. This is what I have so far: The header file: #import <UIKit/UIKit.h> @interface ElSimView : UIView { CGPoint firstTouch; CGPoint lastTouch; UIColor *pointColor; CGRect *points; int npoints; } @property CGPoint firstTouch; @property CGPoint lastTouch; @property (nonatomic, retain) UIColor *pointColor; @property CGRect *points; @property int npoints; @end The implementation file: //@synths etc. - (id)initWithFrame:(CGRect)frame { return self; } - (id)initWithCoder:(NSCoder *)coder { if(self = [super initWithCoder:coder]) { self.npoints = 0; } return self; } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; firstTouch = [touch locationInView:self]; lastTouch = [touch locationInView:self]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; lastTouch = [touch locationInView:self]; points = (CGRect *)malloc(sizeof(CGRect) * ++npoints); points[npoints-1] = CGRectMake(lastTouch.x-15, lastTouch.y-15,30,30); [self setNeedsDisplay]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch = [touches anyObject]; lastTouch = [touch locationInView:self]; [self setNeedsDisplay]; } - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 2.0); CGContextSetStrokeColorWithColor(context, [UIColor blackColor].CGColor); CGContextSetFillColorWithColor(context, pointColor.CGColor); for(int i=0; i<npoints; i++) CGContextAddEllipseInRect(context, points[i]); CGContextDrawPath(context, kCGPathFillStroke); } - (void)dealloc { free(points); [super dealloc]; } @end When I load this and click some points, it draws the first points normally, then then next points are drawn along with random ellipses (not even circles). Also I have another question: When is exactly drawRect executed?

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  • Problem With Views Inside of TabBars (iPhone)

    - by Chris
    I have a UITableView that I am placing inside a TabView. I am trying to put a "spinner" and a label in the center of the TableView. When I view I try to view it inside the TabBar, I do not see the spinner or label. When I view this nib by itself, I see the spinner and TabBar. There seems to be something about views / tabbars that I am not getting...

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  • upload video to youtube via iphone application ----ServiceForbiddenException

    - by user577670
    Hey,I use GData try to upload my video to youtube, but meet these error: serviceBase:<GDataServiceGoogleYouTube: 0x2435f0> objectFetcher:<GDataHTTPUploadFetcher: 0x26dca0> failedWithStatus:403 data:<errors xmlns='http://schemas.google.com/g/2005'> <error> <domain>GData</domain> <code>ServiceForbiddenException</code> <internalReason>Currently authenticated user does not have write access to desrender&apos;s videos.</internalReason> </error> </errors> * is my youtube account. Following is the code: - (GDataServiceGoogleYouTube *)youTubeService { static GDataServiceGoogleYouTube* service = nil; if (!service) { service = [[GDataServiceGoogleYouTube alloc] init]; [service setShouldCacheDatedData:YES]; [service setServiceShouldFollowNextLinks:YES]; [service setIsServiceRetryEnabled:YES]; } // update the username/password each time the service is requested NSString *username = [mUsernameField text]; NSString *password = [mPasswordField text]; if ([username length] > 0 && [password length] > 0) { [service setUserCredentialsWithUsername:username password:password]; } else { // fetch unauthenticated [service setUserCredentialsWithUsername:nil password:nil]; } NSString *devKey = [mDeveloperKeyField text]; [service setYouTubeDeveloperKey:devKey]; return service; } - (IBAction)uploadPressed:(id)sender { NSString *devKey = [mDeveloperKeyField text]; GDataServiceGoogleYouTube *service = [self youTubeService]; [service setYouTubeDeveloperKey:devKey]; NSString *username = [mUsernameField text]; NSString *clientID = [mClientIDField text]; NSURL *url = [GDataServiceGoogleYouTube youTubeUploadURLForUserID:username clientID:clientID]; // load the file data NSString *path = [[NSBundle mainBundle] pathForResource:@"YouTubeTest" ofType:@"m4v"]; NSData *data = [NSData dataWithContentsOfFile:path]; NSString *filename = [path lastPathComponent]; // gather all the metadata needed for the mediaGroup NSString *titleStr = [mTitleField text]; GDataMediaTitle *title = [GDataMediaTitle textConstructWithString:titleStr]; NSString *categoryStr = [mCategoryField text]; GDataMediaCategory *category = [GDataMediaCategory mediaCategoryWithString:categoryStr]; [category setScheme:kGDataSchemeYouTubeCategory]; NSString *descStr = [mDescriptionField text]; GDataMediaDescription *desc = [GDataMediaDescription textConstructWithString:descStr]; NSString *keywordsStr = [mKeywordsField text]; GDataMediaKeywords *keywords = [GDataMediaKeywords keywordsWithString:keywordsStr]; BOOL isPrivate = mIsPrivate; GDataYouTubeMediaGroup *mediaGroup = [GDataYouTubeMediaGroup mediaGroup]; [mediaGroup setMediaTitle:title]; [mediaGroup setMediaDescription:desc]; [mediaGroup addMediaCategory:category]; [mediaGroup setMediaKeywords:keywords]; [mediaGroup setIsPrivate:isPrivate]; NSString *mimeType = [GDataUtilities MIMETypeForFileAtPath:path defaultMIMEType:@"video/mp4"]; // create the upload entry with the mediaGroup and the file data GDataEntryYouTubeUpload *entry; entry = [GDataEntryYouTubeUpload uploadEntryWithMediaGroup:mediaGroup data:data MIMEType:mimeType slug:filename]; SEL progressSel = @selector(ticket:hasDeliveredByteCount:ofTotalByteCount:); [service setServiceUploadProgressSelector:progressSel]; GDataServiceTicket *ticket; ticket = [service fetchEntryByInsertingEntry:entry forFeedURL:url delegate:self didFinishSelector:@selector(uploadTicket:finishedWithEntry:error:)]; [self setUploadTicket:ticket]; } It almost same as GData's YouTubeSample.. Someone help me!!!!

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