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• How to add uitoolbar to uitableviewcontroller?

  - by Jakub

  I have an UITableViewController which I would like to add UIToolbar to with one button. In the - (void)viewDidLoad; method of UITableViewController I have: - (void)viewDidLoad { [super viewDidLoad]; UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(pressButton1:)]; self.navigationItem.title = @"Some title"; self.navigationItem.leftBarButtonItem = button; } Unfortunately I don't see the toolbar when I run my app. Any hints? Should I do something more?

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• UITextView like iPhone Notes application

  - by Mark

  I am trying to recreate the Notes application. So far I got the following: textView = [[UITextView alloc] initWithFrame:CGRectMake(25.0, 30.0, 295.0, 214.0)]; textView.delegate = self; textView.backgroundColor = [UIColor clearColor]; textView.font = [UIFont fontWithName:@"MarkerFelt-Thin" size:19.0]; [self.view addSubview:textView]; The thing I dont know is how they were able to put the date on top like a header (it is within the UIScrollView that is obvious). Also under every text there is a line where did that came from. Does someone have an idea or a sample project I can take a look at?

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• Who should call viewDidLoad on progammatically loaded views?

  - by Remus Rusanu

  When I need to load a view programatically I do the following: MyController* myController = [[MyController alloc] init]; [[NSBundle mainBundle] loadNibNamed:@"myNib" owner:myController options:nil]; // use my controller here, eg. push it in the nav controller This works fine, but my controller's viewDidLoad is never called. So I resorted to manually calling it after the loadNibNamed call, but it doesn't seem correct. I was expecting the framework to call the viewDidLoad on my behalf. Is this the right way or I'm missing something?

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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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• UITableViewCell is transparent when not supposed to be

  - by David Liu

  My UITableViewCell is being transparent when it's not supposed to be. My table view has a background color and it shows through the table cell, even though they're supposed to be opaque. I'm not sure why this is. Relevant code: UITableViewCell *cell = [table dequeueReusableCellWithIdentifier:emptyIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:emptyIdentifier] autorelease]; } cell.textLabel.text = @"Empty"; cell.textLabel.textAlignment = UITextAlignmentCenter; cell.textLabel.backgroundColor = [UIColor whiteColor]; return cell;

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• Load NSAttributedString from File

  - by Wayfarer

  Is there a way to have some sort of rich text in a file, and load the file into an NSAttributedString? I looked into loading a .rtf file into an NSAttributed String: NSString *filePathFooter = [[NSBundle mainBundle] pathForResource:kFooterFileName ofType:@"rtf"]; NSError *error = nil; NSAttributedString *string = [[NSAttributedString alloc] initWithFileURL:[NSURL URLWithString:filePathFooter] options:nil documentAttributes:NULL error:&error]; But this leaves me with: Error Domain=NSCocoaErrorDomain Code=258 "The operation couldn’t be completed. (Cocoa error 258.)" Is there a way to do this?

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• Release a retain UIImage property loaded via imageNamed?

  - by user158103

  In my class object i've defined a (nonatomic, retain) property for UIImage. I assigned this property with an image loaded via [UIImage imageNamed:@"file.png"]; If at some point I want to reassign this property to another image, should I have to release the prior reference? I am confused because by the retain property I know i should release it. But because imageNamed is a convenience method (does not use alloc), im not sure what rule to apply here. Thanks for the insight!

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• My iPhone App doesn't work in iOS 4. Why?

  - by noflipes

  Hi everybody. I make a iPhone App that display some videos, I made it with Xcode 3.2.2 with iPhone SDK 3.1.3 and works fine. But a few days ago I downloaded the last version of the iPhone SDK for iOS 4, the proyect Build ok, no erros, no warnings, but when I run the aplication the video didn't work, the image didn't load but sound works. I don't understand it. Here is the code that I used. NSBundle *Bundle = [NSBundle mainBundle]; NSString *moviePath = [Bundle pathForResource:@"Prueba" ofType:@"mp4"]; NSURL *movieURL = [[NSURL fileURLWithPath:moviePath] retain]; MPMoviePlayerController *theMovie = [[MPMoviePlayerController alloc] initWithContentURL:movieURL]; theMovie.scalingMode = MPMovieScalingModeFill; [theMovie play]; Some idea? Best regards

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• NSWindowController and isWindowLoaded

  - by Jim

  Hi, I have an NSWindowController and I initialize it like this; + (MyWindowController *) sharedController { static MyWindowController *singleton = nil; if (!singleton) singleton = [[self alloc] initWithWindowNibName: @"myWindow"]; return singleton; } and I show windows like this; [[MyWindowController sharedController] showWindow: nil]; Now the problem is that I need information from some controls on that window. But I do not want to load the window if it's not yet loaded because then I can just go with the defaults. Should I use @property to access the singleton? or what is recommended here? (If @property, then please give me the readonly, nonatomic attributes too.)

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• NSThread running a class

  - by Thomas Joulin

  Hi, Every the example I find on the internet (including Apple doc) sets the target to self like this : [NSThread detachNewThreadSelector:@selector(threadedTask) toTarget:self withObject:nil]; Since i would like to do a more complex task in background (involving multiple methods), I thought of creating a class Task called like this : Task *task = [[Task alloc] init]; [NSThread detachNewThreadSelector:@selector(main) toTarget:task withObject:nil]; but I wonder, how will be handled the instance variables of my class Task ? in my method main can I safely call methods of my class Task using [self myMethod] and modifying members variables assuming I'm the only thread accessing it ? This way of handling threads seems weird to me, sorry if my question is stupid ^^ Thanks in advance

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• Why is this leaking memory? UIImage `cellForRowAtIndexPath:`

  - by Emil

  Hey. Instruments' Leaks tells me that this UIImage is leaking: UIImage *image = [[UIImage alloc] initWithContentsOfFile:[imagesPath stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@.png", [postsArrayID objectAtIndex:indexPath.row]]]]; // If image contains anything, set cellImage to image. If image is empty, try one more time or use noImage.png, set in IB if (image != nil){ // If image != nil, set cellImage to that image cell.cellImage.image = image; } image = nil; [image release]; (class cell (custom table view cell) also releases cellImage in dealloc method). I haven't got a clue of why it's leaking, but it certainly is. The images gets loaded multiple times in a cellForRowAtIndexPath:-method. The first three cells' image does not leak (130px high, all the space avaliable). Leaks gives me no other info than that a UIImage allocated here in the code leaks. Can you help me figure it out? Thanks :)

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• iOS4.2: TouchBegan does not draw more then one circle per sensed touch

  - by Christian

  Hi all, quick question (which might be a no-brainer for most here) :) My code below should draw a circle for every time touch that is recognised but although more than ones touches are sensed only one circle will drawn up at a time. Can anyone see any obvious issues? This method sits in the XYZViewControler.m class. TouchPoint.m is the class that defines the circle. Thanks a bundle for your help and redirects. Chris - (void) touchesBegan: (NSSet *) touches withEvent: (UIEvent *)event { NSSet * allTouches = [event allTouches]; // get all events for (UITouch * touch in touches) { TouchPoint * touchPoint = [[TouchPoint alloc] initWithFrame:CGRectMake(0, 0, circleWidth, circleWidth)]; touchPoint.center = [touch locationInView:[self view]]; touchPoint.color = [UIColor redColor]; touchPoint.backgroundColor = [UIColor whiteColor]; [[self view] addSubview: touchPoint]; [touchPoint release]; CFDictionarySetValue(touchMap, touch , touchPoint); } [[self view] setNeedsDisplay]; }

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• Youtube video embed in WebView and MoviePlayer control

  - by Tronic

  hi, i embed a youtube video into a webview. the problem is: when i pop the current view (which includes the webview) from navigation controller, the the movie itself stops, but the audio is continues running. when i push the view controller on the navigation controller again, i can play the movie newly, but the old audio is still there. my webview code ids_ = [NSArray arrayWithObjects:@"2b84g38Z_60",@"3URx0tM-rMc",@"HZpi-2HVhq0",@"Hhns0DRPI44",@"hRuoxRQ4Q3k",@"lkMXwNBGRA8",@"tXGc6wWIFJo",@"uzGdEn8aW-Q",@"ZAoEBdt8C5M",@"vn8EJqt2BvQ",@"7Z_qRbjG6Ck",@"JspRcxGUijs"@"lM2lcVOh5YU",@"2b84g38Z_60",nil]; int numIds_ = [ids_ count]; NSLog(@"%d", arc4random()%numIds_); NSString *youTubeVideoHTML = [[NSString alloc] initWithFormat:@"<html><head></head><body style=\"margin:0;background-color:#000;\"><iframe class=\"youtube-player\" type=\"text/html\" width=\"640\" height=\"365\" src=\"http://www.youtube.com/embed/%@\" frameborder=\"0\"></iframe></body></html>", [ids_ objectAtIndex:arc4random()%numIds_]]; NSLog(youTubeVideoHTML); [youtubeView loadHTMLString:youTubeVideoHTML baseURL:nil]; thanks in advance

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• How to present the same modalView after dismissing it once

  - by David Casillas

  I'm having some problem trying to present a modal view controller after it has been presented the first time, so I just start a little test method, it presents, dismisses and presents again the same controller modally. // This is just test Code. MYViewController *vc = [[MYViewController alloc] init]; [self presentModalViewController:vc animated:YES]; [self dismissModalViewControllerAnimated:YES]; [self presentModalViewController:vc animated:YES]; I get the error: 2011-11-15 09:50:42.678 Proyecto3[1260:11603] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Application tried to present modally an active controller <RootViewController: 0x6d9d090>.' The documentation does not add any clue here.

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• Retrieving NSDate from NSString

  - by Olivier de Jonge

  I have an iPhone app. that is receiving data with IRFC 3339 timestamp format (e.g. @"2010-01-29T11:30:00.000+01:00"), as in GData. I want to convert the data to an NSDate NSDateFormatter *inputFormatter = [[[NSDateFormatter alloc] init] autorelease]; [inputFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"]; [currentEntry setStartTime:[inputFormatter dateFromString: ][currentEntry startTimeString]]]; But I'm missing out how to convert the last part of the string @"2010-01-29T11:30:00.000+01:00": the time offset. Anyone knows what I have to add to this String to take the time offset in account too?

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• UINavigationController Push Crash in Distribution but not Release

  - by Alavoil

  I have a UINavigationController that I will be pushing a new view onto from selection of a UITableView row. I have tested this feature in "Release" configuration and it works perfectly, however when I build for "Distribution" it crashes when trying to push the new view onto the stack. - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { /* irrelevant code */ DetailsViewController *detailController = [[DetailsViewController alloc] initWithNibName:@"DetailsViewController" bundle:nil]; detailController.name = tmpName; detailController.time = tmpTime; [self.navigationController pushViewController:detailController animated:YES]; return nil; } An exception is thrown on the line where the controller is pushed onto the stack. I have verified that the detailController is not nil. Again, this only happens in my "Distribution" build of the code. Any ideas?

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• NSMutableArray EXC_BAD_EXCESS SIGBUS

  - by sujyanarayan

  Hi, I've the following code which causes crashes after sometime as i've set the below code in a timer:- CGImageRef cgImage = UIGetScreenImage(); [array addObject:(id)cgImage]; CGImageRelease(cgImage); Where initiallly i've declared "array" as: array = [[NSMutableArray alloc] init]; The timer goes well till 10 seconds as timer is of 1/10 seconds after 10 seconds it crashes. I think the application crashes because of EXC_BAD_EXCESS but dont know how to solve. Can Anybody help in solving the problem? Thanks in Adv.

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• Frame of viewForHeaderInSection is always the same size

  - by gabac

  - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section { if(section != 0) { UIView *view = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 100, 30)]; view.backgroundColor = [UIColor redColor]; return view; [view release]; } else { return tableView.tableHeaderView; } } This is my implementation of viewForHeaderInSection but whatever frame I make it's always showing me the same red frame. Do you see any problem with my code? Can't post the picture because of my rep but here is the link ;-) http://img638.imageshack.us/img638/3350/bildschirmfoto20100315uq.png

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• Presenting UIModalViews in Landscap mode

  - by Dominik

  Hello, I'm trying to present some UIModalFormSheets in a my iPad application. It's working without any problems, except one thing: When I have my iPad in landscape mode my modal form sheet is moving to the center of the screen and THEN rotates into the appropiate angle. All I want is to present the modal form sheet in the right angle according to the view mode (portrait or landscape), BEFORE it is displayed, so that the user doesn't see this rotation. I have tried all the modes for modalTransitionStyle and modalPresentationStyle, but nothing seems to prevent the modal form sheet from rotating after it is displayed. This is what I'm doing: NewFavouriteSheet *newFavouriteSheet = [[NewFavouriteSheet alloc] initWithNibName:@"NewFavouriteSheet" bundle:nil]; newFavouriteSheet.modalPresentationStyle = UIModalPresentationFormSheet; [self presentModalViewController:newFavouriteSheet animated:NO]; Does anyone has a suggestion on how to show the modal view in a correct way? Thanks for help. Dominik

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• Memory Management - Objective C NSString

  - by reising1

  I have an NSMutableDictionary called "output" and I am adding an NSString into it that is an integer. What is the proper way to do this? I can't figure it out. Everything I've tried ends up giving memory leaks. This is what I currently have: val is an int countryName is an NSString Here is how I declare "output": NSMutableDictionary *output = [[[NSMutableDictionary alloc] init] autorelease]; Here is the code that causes a memory leak: NSString *temp = [NSString stringWithFormat:@"%d",val]; [output setValue:temp forKey:countryName];

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• UIImageWriteToSavedPhotosAlbum Problem

  - by Momeks

  Hi , i try to save a photo from camera after take a photo with a button . here is my codes: -(IBAction)takePic { ipc = [[UIImagePickerController alloc]init]; ipc.delegate = self; ipc.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentModalViewController:ipc animated:YES]; } - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { img.image = [info objectForKey:UIImagePickerControllerOriginalImage]; [[picker parentViewController]dismissModalViewControllerAnimated:YES]; [picker release]; } but i dont know why doesnt save anything !

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• Table View Cell value from iphone

  - by Shibin Moideen

  Hi all, I just want to get the value of a cell in the table view when i tap on it.. can any one help me in this.? Thanks in Advance Shibin Moideen - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { appDelegate.courseName=[appDelegate.courses objectAtIndex:indexPath]; NSLog(@"%@",appDelegate.courseName); DetailCourseViewController *detailController = [[DetailCourseViewController alloc] initWithNibName:@"DetailCourseView" bundle:nil]; [self presentModalViewController:detailController animated:YES]; } is that done in this way. also i need to store that value in a string which i declared in the app delegate.

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• Can I create a UITableViewController that inherits from a custom subclass of UIViewController?

  - by prendio2

  I have common functionality that I need to access from all screens of my app: a right bar button item and associated action. So as not to repeat the code I would like to set this up in a custom UIViewController and have all my view controllers inherit from it. - (void)viewDidLoad { UIBarButtonItem *rightBarButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemPlay target:self action:@selector(lightsCamera)]; self.navigationItem.rightBarButtonItem = rightBarButton; } - (void)lightsCamera { … } However, I have a number of UITableViewControllers however and I would like to know if it is possible for them to inherit the functionality too?

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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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• How to remove segmentedcontroller from uinavigationcontroller after view pops?

  - by cannyboy

  I'm building a segmented control within my viewDidLoad method, like so: NSArray *tabitems = [NSArray arrayWithObjects:@"ONE", @"TWO", nil]; UISegmentedControl *tabs = [[UISegmentedControl alloc] initWithItems:tabitems]; tabs.segmentedControlStyle = UISegmentedControlStyleBar; tabs.frame = CGRectMake(185.0, 7.0, 130.0, 30.0); tabs.selectedSegmentIndex = 0; [self.navigationController.navigationBar addSubview:tabs]; [tabs release]; But when the user goes Back in the uinavigationcontroller hierarchy, the segmented controller stays on the navigation bar. How would I get rid of it? Or am I doing something fundamentally wrong?

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