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  • Methods in super that will be subclassed anyway (Cocoa)

    - by Michael Matheus
    Sorry if this is a repost but I couldn't quite search for it because I can't explain it in a few words. I have a super class with lots of methods but they will always (not all of them) be subclassed. From the super I need to access (read only) those methods. I could either leave the methods in super empty or I could just not type them in super but call them anyway like so [self myMethod] and it will call my subclassed method even if it doesn't exist in super. This works but Xcode gives me an error though. 'superclass' may not respond to '-subclassmethod' What should I do?

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  • Cocoa Touch - setting text of header of UITableView

    - by Mark
    Hey all, I'm trying to set the title of the header of my entire UITableView, but am having no success. For example, on this webpage: http://www.iphonesdkarticles.com/2009/01/uitableview-sectioned-table-view.html I am trying to replicate creating the "Countries" header programmatically. I have a UITableView that works and displays data. When I insert the following line: self.navigationItem.title = @"Countries"; In my viewDidLoad method, nothing happens. Thoughts?

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  • Tool for debugging KVO/Bindings in Cocoa

    - by Raphael Sebbe
    Is there any tool to log current observers of a given object, in the spirit of what "gdb info gc-roots" does? I found "gdb info gc-references" could do that (sort of) as a by-product of its original purpose, but that won't work with non garbage collected apps. Thanks!

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  • Simulating a button press without performClick: (cocoa osx/cocotron)

    - by Michael Minerva
    I need to be able to display popup menu when I press an openGL object. I was able to accomplish this by triggering the performClick: of an inviible NSPopupButton and also by triggering the performClickWithFrame:inView: of an NSPopupButtonCell. Both of these methods were successful on OSX but I also need to target the PC and unfortunately performClickWithFrame:inView: is unimplemented in cocotron and performClick does not cause the menu to be displayed when executed on an NSPopupButton (on cocotron). Now there must be someway for this to work because the NSPopupButton does sucesfully display the NSPopupButtonCell when it is clicked but I know it does not accomplish by calling performClick:. Can I access these lower levels methods used by the NSPopupButton to display my menu or force the invisible NSPopupButton to display its menu? If so can anyone link me to some info about this?

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  • cocoa - IF failing for double?

    - by Mike
    I have a set of NSTimeIntervals like this: NSArray *mySet = [NSArray arrayWithObjects: [NSNumber numberWithDouble: time1], // [NSNumber numberWithDouble: time2], [NSNumber numberWithDouble: time3], nil]; // suppose that at this time // time1 = 0.00000 // time2 = 18.3200 // time3 = 21.6500 at some point in my code I want to test if currentTime is greater or equal to one of the times on the array, so I do // currentTime = 18.32 right now for (int i=0; i<[mySet count]; i++) { if (currentTime >= [[mySet objectAtIndex:i] doubleValue]) { NSLog(@"%d...", i); } } The output should be "1...2..." but the output is just "1..." when i = 1, it is comparing 18.32 to 18.32 and failing to recognize that the value is equal or greater than the other? WTF??? How can that be? thanks for any help.

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  • MBProgressHUD for Mac? - Cocoa

    - by Kevin
    Hey there everyone, So I'm used to the iPhone API, and I used MBProgressHUD a lot in my iPhone applications, but since I started developing apps for the Mac I noticed that I can't use MBProgressHUD. Is there an alternative that will do the same job as the MBProgressHUD? I notice that apple has it in their OS as well. If anyone could help me find an alternative for MBProgressHUD, I would greatly appreciate it!! Thanks, Kevin

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  • Cocoa-Touch Fun. Name the Alphanumerically Longest Method Name?

    - by dugla
    So, as I get comfortable with Cocoa/Cocoa-Touch I, like others can't help but notice the rather verbose method names. What is the absolutely longest method in Cocoa-Touch that you have come across? To kick things off, I submit that perennial favorite from UITableViewController - tableView:accessoryButtonTappedForRowWithIndexPath: Cheers, Doug

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  • Cocoa Core Data - Efficient Related Entities Counts

    - by Gary
    I am working on my first iPhone application and I've hit a wall. I'm trying to develop a 'statistics' page for a three entity relationship. My entities are the following: Department - Name, Address, Building, etc. People - Name, Gender (BOOL), Phone, etc If I have fetched a specific department how do I filter those results and only return people that are Male (Gender == 0)? If I do NSLog(@"%d", [department.people count]); I get the correct number of people in that department so I know I'm in the neighborhood. I know I could re-fetch and modify the predicate each time but with 20+ stats in my app that seems inefficient. Thanks for any advice!

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  • Cocoa Drag and Drop, reading back the data

    - by kodai
    Ok, I have a NSOutlineView set up, and I want it to capture PDF's if a pdf is dragged into the NSOutlineView. My first question, I have the following code: [outlineView registerForDraggedTypes:[NSArray arrayWithObjects:NSStringPboardType, NSFilenamesPboardType, nil]]; In all the apple Docs and examples I've seen I've also seen something like MySupportedType being an object registered for dragging. What does this mean? Do I change the code to be: [outlineView registerForDraggedTypes:[NSArray arrayWithObjects:@"pdf", NSStringPboardType, NSFilenamesPboardType, nil]]; Currently I have it set up to recognize drag and drop, and I can even make it spit out the URL of the dragged file once the drag is accepted, however, this leads me to my second question. I want to keep a copy of those PDF's app side. I suppose, and correct me if I'm wrong, that the best way to do this is to grab the data off the clipboard, save it in some persistant store, and that's that. (as apposed to using some sort of copy command and literally copying the file to the app director.) That being said, I'm not sure how to do that. I've the code: - (BOOL)outlineView:(NSOutlineView *)ov acceptDrop:(id <NSDraggingInfo>)info item:(id)item childIndex:(NSInteger)childIndex { NSPasteboard *pboard = [info draggingPasteboard]; NSURL *fileURL; if ( [[pboard types] containsObject:NSURLPboardType] ) { fileURL = [NSURL URLFromPasteboard:pboard]; // Perform operation using the file’s URL } NSData *data = [pboard dataForType:@"NSPasteboardTypePDF"]; But this never actually gets any data. Like I said before, it does get the URL, just not the data. Does anyone have any advise on how to get this going? Thanks so much!

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  • Can I access the Cocoa Accessibility API from with Java on OSX?

    - by sanity
    I need to write an app which can observe and manipulate the positions of windows on screen, and I've been told that this requires using Cocoa's Accessibility API. Unfortunately I'm a Java programmer, and Objective C scares me ;) Is it possible to access this Cocoa API from within Java? I know that back when Apple cared about Java it maintained a "bridge" to cocoa, but I'm not sure if this does what I need. Oh, and my IDE is Eclipse, in case that is relevant.

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  • Cocoa & Cocoa Touch. How do I create an NSData object from a plain ole pointer?

    - by dugla
    I have malloc'd a whole mess of data in an NSOperation instance. I have a pointer: data = malloc(humungous_amounts_of_god_knows_what); uint8_t* data; How do I package this up as an NSData instance and return it to the main thread? I am assuming that after conversion to an NSData instance I can simply call: free(data); Yes? Also, back on the main thread how do I retrieve the pointer? Thanks, Doug

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  • how to terminate cocoa app in applicationWillFinishLaunching delegate

    - by AmitSri
    I have to show the custom license Agreement dialog to the user before they start using my application.So, i have added new window in my mainMenu.xib and showing that window modally using [NSApp runModalForWindow:licenseWindow]; in applicationWillFinishLaunching: delegate by making my main window hidden using visible at Launch to unchecked. License window has two buttons Agree and Disagree. I need to show the mainwindow if user clicks on Agree button and terminate the app if they choose Disagree. I try to call [NSApp terminate]; in applicationWillFinishLaunching: but it didn't do anything. Please let me know how i can terminate the app in applicationWillFinishLaunching: Thanks

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  • Changing a view after modalViewController is dismissed (Cocoa Touch)

    - by Calvin L
    I have a viewController that presents a modalViewController when a UINavigationBarItem is touched. After the user is done with the modal view, the modalViewController is dismissed. At this point I want to change/remove the NavigationBarItem -- how would I accomplish this? I was thinking of using viewWillAppear: but I only want the change to happen when the modalViewController is dismissed.

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  • Cocoa touch - prepopulate facebook connect publish to feed

    - by teepusink
    Hi, I'm using the iPhone facebook connect package. How do I prepopulate the "publish to feed" example or take out the message field? Something like this one http://www.burnthebox.us/mobile/iPhone/products/disconnect/instructions/images/DisConnect_FB_Publish_Story.png (The default in the example has an input text field) Also what would it take to skin the popup look? Thanks, Tee

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  • In Cocoa, how to create an unobstructive service?

    - by TP
    Hi, I have created a service that will transfer selected text to my application. However, every time I make a transfer using the keyboard shortcut, my application become the focus. I have to manually focus back to the original application. How do I make it unobstructive?

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  • [Cocoa] Core Animation with an NSView and subviews

    - by ndg
    I've subclassed NSView to create a 'container' view (which I've called TRTransitionView) which is being used to house two subviews. At the click of a button, I want to transition one subview out of the parent view and transition the other in, using the Core Animation transition type: kCATransitionPush. For the most part, I have this working as you'd expect (here's a basic test project I threw together). The issue I'm seeing relates to resizing my window and then toggling between my two views. After resizing a window, my subviews will appear at seemingly random locations within my TRTransitionView. Additionally, it appears as if the TRTransitionView hasn't stretched correctly and is clipping the contents of its subviews. Ideally, I would like subviews anchored to the top-left of their parent view at all times, and to also grow to expand the size of the parent view. The second issue relates to an NSTableView I've placed in my first subview. When my window is resized, and my TRTransitionView resizes to match its new dimensions, my TableView seems to resize its content quite awkwardly (the entire table seems to jolt around) and the newly expanded space that the table now occupies seems to 'flash' (as if in the process of being animated). Extremely difficult to describe, but is there any way to stop this? Here's my TRTransitionView class: -(void) awakeFromNib { [self setWantsLayer:YES]; [self addSubview:[self currentView]]; transition = [CATransition animation]; [transition setType:kCATransitionPush]; [transition setSubtype:kCATransitionFromLeft]; [self setAnimations: [NSDictionary dictionaryWithObject:transition forKey:@"subviews"]]; } - (void)setCurrentView:(NSView*)newView { if (!currentView) { currentView = newView; return; } [[self animator] replaceSubview:currentView with:newView]; currentView = newView; } -(IBAction) switchToViewOne:(id)sender { [transition setSubtype:kCATransitionFromLeft]; [self setCurrentView:viewOne]; } -(IBAction) switchToViewTwo:(id)sender { [transition setSubtype:kCATransitionFromRight]; [self setCurrentView:viewTwo]; }

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  • Cocoa -- getting a simple NSImageView to work

    - by William Jockusch
    I am confused about why this code does not display any image: In the app delegate: - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { NSRect rect = window.frame; rect.origin.x = 0; rect.origin.y = 0; BlueImageView *blueImageView = [[BlueImageView alloc]initWithFrame:rect]; window.contentView = blueImageView; // also tried [window.contentView addSubview: blueImageView]; } BlueImageView.h: @interface BlueImageView : NSImageView { } @end BlueImageView.m: @implementation BlueImageView - (id)initWithFrame:(NSRect)frame { self = [super initWithFrame:frame]; if (self) { [self setImage: [NSImage imageNamed:@"imagefile.png"]]; NSAssert(self.image, @""); NSLog (@"Initialized"); } return self; } - (void)drawRect:(NSRect)dirtyRect { } @end The file imagefile.png exists. The NSAssert is not causing an exception. The NSLog is firing. But no image shows up in the window.

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  • Cocoa : Scale Image dragged into an ImageWell

    - by Holli
    I am working on application to keep a comic book collection in order. The user should be able to drag an image of the cover artwork into the program via an ImageWell. Since it is not possible to drag the image out of the application again I don't need to save the picture in it's original size. An image at the size of the ImageWell would be just fine. The question is how do I rescale the image with my application? To make things even more complicated the ImageWell is bound with Core Data. So I need to rescale the image before Core Data will save the picture in its original size.

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  • Cocoa - NSFileManager removeItemAtPath Not Working

    - by Kevin
    Hey there everyone, I am trying to delete a file, but somehow nsfilemanager will not allow me to do so. I do use the file in one line of code, but once that action has been ran, I want the file deleted. I have logged the error code and message and I get error code: 4 and the message: "text.txt" could not be removed Is there a way to fix this error "cleanly" (without any hacks) so that apple will accept this app onto their Mac App Store? EDIT: This is what I am using: [[NSFileManager defaultManager] removeItemAtPath:filePath error:NULL]; Thanks, kevin

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  • Cocoa multiple threads, locks don't work

    - by Igor
    I have a threadMethod which shows in console robotMotorsStatus every 0.5 sec. But when I try to change robotMotorsStatus in changeRobotStatus method I receive an exception. Where I need to put locks in that program. #import "AppController.h" @implementation AppController extern char *robotMotorsStatus; - (IBAction)runThread:(id)sender { [self performSelectorInBackground:@selector(threadMethod) withObject:nil]; } - (void)threadMethod { char string_to_send[]="QFF001100\r"; //String prepared to the port sending (first inintialization) string_to_send[7] = robotMotorsStatus[0]; string_to_send[8] = robotMotorsStatus[1]; while(1){ [theLock lock]; usleep(500000); NSLog (@"Robot status %s", robotMotorsStatus); [theLock unlock]; } } - (IBAction)changeRobotStatus:(id)sender { robotMotorsStatus[0]='1'; }

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  • Cocoa class not displaying data in NSWindow

    - by Matt S.
    I have one class that controls one window, and another class that controls a different window in the same xib, however, the second window never displays what it should. In the first class I alloc and init the second class, then pass some information to it. In the second class it displays that data in the table view. Yes, in the .xib I have all the connections set up correctly, I've quadruple checked. Also the code is correct, same with the connections, I've quadruple checked.

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