Hello! I have a producer and a consumer. Producer fills its internal queue with objects, consumer takes these objects one by one. I want to synchronize the cosumer with the producer, so that the consumer blocks when there are no objects ready, and I want to synchronize the producer with itself, so that it stops producing when the queue i...
Hi all, In my application I have taken certain table views, their data gets refreshed in background thread if a user makes and save changes. Problem is- when user is making some edit to a table row and its data gets refreshed in background, due to changes done by some other user, then the application crashes. Can anyone...
How can I replicate the Finder's "Open With" menu for a given file type? ...
I am creating an application and I get an EXC_BAD_ACCESS error. CODE @interface DNProjectsCategory : DNCategory { NSArray *projects; } @property(nonatomic, retain) NSArray *projects; @end And: @implementation DNProjectsCategory @synthesize projects; // MEM - (void)dealloc { [projects release]; [super dealloc]; } // INI...
Hi, I was trying to restrict the scope of a NSMetadataQuery item. I know there's the -setSearchScope method, but it lets me only decide in which directories the item will search. What if I need to exclude one or more directories from the scope? ...
I am currently trying to setup a NSFetchedResultsController that will order my table view based on the number of entities in a to-many relationship. I am not sure if this makes a difference when counting, but this is also an inverse relationship. I thought something like this would work just fine: NSEntityDescription *entity = [NSEntit...
I want an NSView that can be resized by dragging its the bottom right corner around, just like an NSWindow. I want to be able to embed this NSView into a parent NSView. Is there a component like this in Cocoa or any of its extensions? ...
I want NSLogto output a literal escape sequence, without treating it as a pattern. Take, for example NSLog(@"image%03d.jpg");, who's output I want to be the actual contents, image%03d.jpg instead of image000.jpg. I've tried various escape sequences like NSLog(@"image\\%03d.jpg");, NSLog(@"image\\%03\\d.jpg"); and NSLog(@"image%03\\d.jp...
Hi there, I'm trying to set attributes with Core Data but it won't work. Every time I call the mehtod setAveScore it throws the error [Stats setAveScore:]: unrecognized selector sent to instance 0x3364c0 Any idea what is going wrong? The call: Stats *sObj = [Stats alloc]; NSNumber *foo = [[NSNumber alloc ]initWithInt:1]; sObj.aveScor...
I am trying to draw a repeating background image in my NSView, I have this till now: // INIT - (id)initWithFrame:(NSRect)frame { if (self = [super initWithFrame:frame]) { self.backgroundImage = [NSImage imageNamed:@"progressBackground.pdf"]; } return self; } // DRAW - (void)drawRect:(NSRect)dirtyRect { // Draw the backgrou...
In my controller class, I initialize two instances of a model class (whose header is properly imported into controller class) with an NSButton. The model is really simple, just 4 members and one method - attack(). Making a silly text game! - (IBAction)startGame:(id)sender { Combatant *hero = [[Combatant alloc] init]; Combatant...
I have this code to load an NSView from a NIB and add it to another NSView: // INIT - (void)awakeFromNib { // Load nib DNListViewController *listViewController = [[DNListViewController alloc] initWithNibName:@"ListView" bundle:nil]; // Add view to window [listViewController.view setFrame:detailView.frame]; [detailView addSubv...
So from my understanding (one of) the biggest allures of Obj-C is the dynamic, message-passing runtime. How's this and other features overall beneficial to Cocoa development? Why was Obj-C used for Cocoa dev and not C++/C? Basically I'm trying to understand how such language features are actually beneficial in terms of when actually...
I have an NSArrayController that I'm using to provide data to an IKImageBrowserView. I want to support drag and drop from the IKImageBrowserView to other applications. Here's the relevant method from my code: - (NSUInteger) imageBrowser:(IKImageBrowserView *) aBrowser writeItemsAtIndexes:(NSIndexSet *) itemIndexes toPasteboard:(NSPasteb...
This seems like it should be easy yet I must be missing something. I have a document-based application. I have also built a new XIB that has a NSTableView and three buttons on it that I intend to display a list of previous files. I wish this XIB to be displayed instead of the document window when the application first starts. Once th...
This seems like it should be something that's easy to do, but I can't seem to find a source out there to tell me how to do it. I would like to load a texture from an image file into my shader. I'm trying to stick as close to the core profile as possible in OpenGL 3.3, although I understand a lot of things are still not implemented in O...
hey guys, I have a large image, and then i'm extracting a portion of the image out via: [mBaseImage lockFocus]; NSBitmapImageRep* bitmapImageRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect: NSMakeRect(startX,startY,width,height)]; [mBaseImage unlockFocus]; followed by: extractedImage = [[NSImage alloc] initWithSize:[bitmapIma...
My example date is 08.10.2010 (friday), so the startdate should be 04.10.2010 (monday). NSDate *today = [[NSDate alloc] init]; NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDateComponents *weekdayComponents = [gregorian components:NSWeekdayCalendarUnit fromDate:today]; NSDateComponents ...
NSString *dateString = @"20.10.2010"; NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease]; [dateFormatter setDateFormat:@"dd.MM.yyyy"]; [dateFormatter setLocale:[NSLocale currentLocale]]; NSLog(@"%@", [dateFormatter dateFromString:dateString]); My output is: 2010-10-19 22:00:00 GMT Why is one day lost? ...
Is it possible to generate an embedded Unix timestamp via a preprocessor macro? For instance: #define VERSION_EXPIRE __TIMESTAMP__ The reason for this is, that i have beta versions and i want to generate an expire timestamp on compile time (in a special Debug build configuration). Regards, Erik ...