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  • Does UIActivityIndicator require manual threading on iPhone

    - by Akusete
    I am running creating an iPhone application which performs a costly operation and I wanted to create an activityIndicator to let the user know the application has not frozen. The operation is performed entirely in one event call... so there is no chance for the UI framework to receive control to actually display and animate this indicator. The sample apps which use the UIActivityIndicator (or any other similar animation) start and stop the animation in different events, triggered separately at different stages of the program. Do I need to manually create a separate thread to run my operation in, or is there already default support for this kind of behavior?

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  • Strategy to keep track of stored files in the documents directory?

    - by mystify
    In my app, the user can save his input to disk. This is done with NSKeyedArchiver. Currently I simply name my files with a timestamp. But of course, the user may want to load one of them back in to keep on editing them. What would be the most reliable / safe strategy to keep track of those files? I need to present the user a list of those files, so that he can choose one to open. Currently I think of making an archived NSMutableArray which simply stores the file names, but I feel that this strategy is not really good. We all know when we save files sometimes something goes wrong, and this seems very likely to get currupted easily, or not? How would you do it?

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  • How to call a method of a specific class from another class (created in this specific class) ?

    - by choise
    I created a TTModelViewController. in the createModel Method i created a TTURLRequestModel. after Loading content in the TTURLRequestModel i want to call a method in my TTModelViewController. TTModelViewController - (void) createModel { requestModel = [[singlePostModel alloc] initWithId:@"54"]; } - (void)didLoadModel:(BOOL)firstTime { NSLog(@"loaded"); } TTURLRequestModel (singlePostModel) - (void)requestDidFinishLoad:(TTURLRequest*)request { //doing something [super requestDidFinishLoad:request]; } first i thought "didLoadModel" gets called after requestDidFinishLoad was called, but its before. So, how can i call a method in my TTModelViewController after request is finished loading? is there a method that already does that and i only have to overwrite this? or something else? thanks // if knowbody knows how to do this with three20, anybody can tell me how to do this in general?

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  • Objective-C Framework PSMTabBarControl does not work

    - by ahmet2106
    Hello everybody In my App I'm trying to get PSMTabBarControl working, but all I do - nothing... I have copied the framework File in my Frameworks folder of my App, then included it. In my InterfaceBuilder (1.3.2) I was able to drag and drop the PSMTabBarControl to my Window and link it with the NSTabView (PSM - tabView - NSTabView && NSTabView - delegate - PSM), but after i tried a Demo (apple+r) I cant see the Tabs... Tried all I can - but dont know why.. Am I doing sth. wrong? Which other Framework or Source I can use to create Tabs like Firefox oder Safari? Thank you!

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  • how can we count the time interval of the animation in cocos2d ?

    - by srikanth rongali
    Hi, I am doing my program in cocos2d. I am using NSDate to get the current time of the start of animation. And I know my animation takes 3 seconds. So I can get the time at completion of animation by using NSInterval and using the previous time and animation time. But, if If the animation time interval is not fixed how can I calculate the time interval of the animation and time at the completion of the animation ? I am animating a sprite. Please help how can I make it. Thank You.

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  • NSURLErrorDomain error -3001

    - by David Schiefer
    Hi, I'm trying to download a file from the internet, but I get the error -3001 back. I've been searching through google but the error doesn't appear on any website, so i have no idea what it means. Can anyone tell me what the error code "NSURLErrorDomain error -3001" means? Thanks

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  • How to programatically set cell.textLabel.text from a different view?

    - by Andy
    I've got a view controller, call it VC1, that's a table view. When I tap a cell in the table view, I am presented with a new view controller, call it VC2, which is a short list of choices. After making a choice, I want to dismiss VC2 and set the cell.textLabel.text property of the VC1 cell I originally tapped to the value I selected in VC2. Conceptually speaking, what is the proper way to do this? I've tried a handful of different approaches, but all of them seem wonky at best, and only one of them actually worked - although it was the most cumbersome of all, passing references to both view controllers and table view cells and all kinds of things. It just feels like I'm making a mountain out of what is probably a mole hill. This is such a common paradigm that I find it hard to believe there's not a simple method for doing it. Thanks in advance for any input you can offer.

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  • Passing values from UIButton to an UIActionSheet

    - by Michael
    I'm trying to send an ActionSheet a variable from a button. I can't use the tag property because its being used for something else. I've declared myIndexRow as an instance variable and have: NSInteger myIndexRow = indexPath.row; [deleteButton addTarget:self action:@selector(showDeleteSheet:) forControlEvents:UIControlEventTouchUpInside]; deleteButton.myIndexRow = myIndexRow; but I'm getting the 'Request for member 'myRow' is something not a structure or union' There is something obvious I am missing here.

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  • problem with NSInputStream on real iPhone

    - by ThamThang
    Hi guys, I have a problem with NSInputStream. Here is my code: case NSStreamEventHasBytesAvailable: printf("BYTE AVAILABLE\n"); int len = 0; NSMutableData *data = [[NSMutableData alloc] init]; uint8_t buffer[32768]; if(stream == iStream) { printf("Receiving...\n"); len = [iStream read:buffer maxLength:32768]; [data appendBytes:buffer length:len]; } [iStream close]; I try to read small data and it works perfectly on simulator and real iPhone. If I try to read large data (more than 4kB or maybe 5kB), the real iPhone just can read 2736 bytes and stop. Why is it? Help me plz! Merci d'avance!

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  • NSNotification postNotificationName in AppDelegate but NSNotificationCenter in ViewController?

    - by James Testa
    I can't get the selector method, receiveChatText, in the NSNotificationCenter to execute and I am wondering if the problem is because the NSNotification postNotificationName is in AppDelegate.m but NSNotificationCenter is in ViewController.m? I.E. can the postNotificationName know that the NSNotificationCenter is in another viewController file or is that something I need to tell it? In a viewController.m I have -(id)init { self = [super init]; if(self){ [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveChatText:) name:ChatMessageReceived object:nil]; return self; } - (void)receiveChatText:(NSNotification *)note { NSLog(@"received chat text"); } and in the top level AppDelegate.m file I have the following: -(void) didReceiveMessage { [[NSNotificationCenter defaultCenter] postNotificationName:ChatMessageReceived object:nil userInfo:nil]; } Any ideas what could stop receiveChatText from being executed when didReceiveMessage is called?

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  • Problem while looping on a NSDictionary

    - by Tom
    Hi! The end of my loop causes a EXC_BAD_ACCESS. Here's my dictionary (AppDelegate.data): 1 = ( 3, "Test 1", False, "" ); 2 = ( 4, "Test 2", False, "" ); And here is my loop: for (id theKey in AppDelegate.data) { if (theKey = nil) { NSLog(@"HOLY COW"); } else { NSLog(@"Key: %@ ?", theKey); } } It never says holy cow, and it says the right key but at the end it crashes... Do you have any idea why? It should only loop on 1 and two and then exit the loop... I know that there's always a "nil" object at the end that's why I did a condition with it but it doesn't look like it works at all.. Thanks!

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  • Popuplating an NSPopupButton with the contents of two NSArrayControllers

    - by ndg
    I'm looking to populate an NSPopupButton with the contents of two NSArrayControllers. The NSArrayControllers are both bound to my Core Data Managed Object Context and represent separate entities (in this example: Person and Department). Within my NSPopupButton, I would like a list of departments, and the people that work under them. Like so: Department 1 Person 1 Person 2 Department 2 Person 3 Person 4 All departments would need to be disabled by default, meaning that users should only be able to select people listed within the dropdown. I'm lost as to how I would go about doing something like this. The concept of manually populating an NSPopupButton seems fairly trivial, but I'm a bit shaky as to best to populate the element with Core Data objects. Essentially, I'm just looking for someone to point me in the right direction. I imagine there's a right way to do this, and a number of very wrong ways.

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  • Using drawAtPoint with my CIImage not doing anything on screen

    - by Adam
    Stuck again. :( I have the following code crammed into a procedure invoked when I click on a button on my application main window. I'm just trying to tweak a CIIMage and then display the results. At this point I'm not even worried about exactly where / how to display it. I'm just trying to slam it up on the window to make sure my Transform worked. This code seems to work down through the drawAtPoint message. But I never see anything on the screen. What's wrong? Thanks. Also, as far as displaying it in a particular location on the window ... is the best technique to put a frame of some sort on the window, then get the coordinates of that frame and "draw into" that rectangle? Or use a specific control from IB? Or what? Thanks again. // earlier I initialize a NSImage from JPG file on disk. // then create NSBitmapImageRep from the NSImage. This all works fine. // then ... CIImage * inputCIimage = [[CIImage alloc] initWithBitmapImageRep:inputBitmap]; if (inputCIimage == Nil) NSLog(@"could not create CI Image"); else { NSLog (@"CI Image created. working on transform"); CIFilter *transform = [CIFilter filterWithName:@"CIAffineTransform"]; [transform setDefaults]; [transform setValue:inputCIimage forKey:@"inputImage"]; NSAffineTransform *affineTransform = [NSAffineTransform transform]; [affineTransform rotateByDegrees:3]; [transform setValue:affineTransform forKey:@"inputTransform"]; CIImage * myResult = [transform valueForKey:@"outputImage"]; if (myResult == Nil) NSLog(@"Transformation failed"); else { NSLog(@"Created transformation successfully ... now render it"); [myResult drawAtPoint: NSMakePoint ( 0,0 ) fromRect: NSMakeRect ( 0,0,128,128 ) operation: NSCompositeSourceOver fraction: 1.0]; //100% opaque [inputCIimage release]; } }

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  • Write to XCode build transcript.

    - by eaigner
    Is there any way to write to the XCode build transcript? What i want to do, is throw a warning if a device is not attached to the computer instead of an assertion failure in my unit test cases (some cases rely on an attached ipod). I thought of something like the standard compiler warnings (only with custom message). Thanks.

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  • How can I conditionally color files and folders in the OS X Finder?

    - by Girish Kolari
    I want to color badge files and folders based on the some condition in finder, what is the approach to achieve this in Mac OS X 10.6 I have checked this question: This only talk about the context menu in finder http://stackoverflow.com/questions/1651075/finder-plugin-in-snow-leopard I have even checked: http://scplugin.tigris.org/ even they don't do color badging in 10.6 which is pending task. Thanks in advance for your all help

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  • Problem adding UIBarButtonItems to a ToolBar

    - by Olivier de Jonge
    I have a UINavigationController with a UITableViewController in it. I want to show a ToolBar on the bottom with UIBarButtonItem's. The ToolBar is showing up, but the buttons won't appear. Anyone knows why? - (void)viewDidLoad { [super viewDidLoad]; [[self navigationItem] setTitle:@"Selections List"]; [[self navigationItem] setRightBarButtonItem:[[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addProjectSearch:)] autorelease]]; [[self navigationItem] setLeftBarButtonItem:[self editButtonItem]]; [[super tableView] setDataSource: self]; [[super tableView] setDelegate: self]; //Toolbar UIBarButtonItem * logoutButton = [[[UIBarButtonItem alloc] initWithTitle:@"Log out" style:UIBarButtonItemStylePlain target:self action:@selector(logOut:)]autorelease]; NSMutableArray * arr = [NSMutableArray arrayWithObjects:logoutButton, nil]; [[self navigationController] setToolbarHidden: NO animated:YES]; [[self navigationController] setToolbarItems:arr animated:YES]; }

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  • XCode - Run Focussed Test

    - by Akshay
    In XCode - Is there a way of running just one test(one test case or preferably one test method). What I do today is to run the 'Test' task which runs all tests and takes up a lot of time. Thanks

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  • Persisting a single UISearchBar instance across 4 separate UITableViews

    - by Jacob Relkin
    Hi fellas, I'm in the midst of an iPhone app that needs to have 4 separate UITableView objects sharing access to one UISearchBar in the first section and first row of the aforementioned UITableView objects. I have tried to offset the UITableView's frame by 44 pixels, then adding the search bar as a subview of my UIViewController's view. That works, but I cannot use the table index to scroll up to the search bar, since it is not a cell in the tableview. I need to have the search bar in the table view itself. My goal is to have the same UISearchBar in the first section of multiple tableviews. Thanks so much.

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  • NSAutoreleasePool carrying across methods?

    - by Tim
    I'm building an iPhone application where I detach some threads to do long-running work in the background so as not to hang the UI. I understand that threads need NSAutoreleasePool instances for memory management. What I'm not sure about is if the threaded method calls another method - does that method also need an NSAutoreleasePool? Example code: - (void)primaryMethod { [self performSelectorInBackground:@selector(threadedMethod) withObject:nil]; } - (void)threadedMethod { NSAutoreleasePool *aPool = [[NSAutoreleasePool alloc] init]; // Some code here [self anotherMethod]; // Maybe more code here [aPool drain]; } - (void)anotherMethod { // More code here } The reason I ask is I'm receiving errors that objects are being autoreleased with no pool in place, and are "just leaking." I've seen other questions where people didn't have autorelease pools in place at all, and I understand why an autorelease pool is needed. I'm specifically interested in finding out whether an autorelease pool created in (in this example) threadedMethod applies to objects created in anotherMethod.

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  • Updating Label on previously loaded view?

    - by fuzzygoat
    I am working on a simple app tab-bar based application that has two views. The first is the main application and the second is a simple instruction screen. What I am trying to do is create a update a label on that second screen as things change in the main app. Because the second screen is only simple with one label and some text I am not unloading it once its loaded. After the first viewDidLoad I can update the label just fine, but after that is there a way to catch successive view switches from the tab-bar menu so I can update the label? many thanks gary

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