StackOverflow2013

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POWhat should I replace this code with?
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copied!<p>I recently got an example of some code from a friend but he told me one line needs to be changed to make it work for me. Here's the code:</p> <pre><code>- (void)tableView:(NSTableView *)aTableView willDisplayCell:(id)aCell forTableColumn: (NSTableColumn *)aTableColumn row:(int)rowIndex { if ([aCell respondsToSelector:@selector(setTextColor:)]) { if ([self visibilityForFile:[fileList objectAtIndex:rowIndex]] == NO) [aCell setTextColor:[NSColor lightGrayColor]]; else [aCell setTextColor:[NSColor blackColor]]; } } </code></pre> <p>I need to replace this line:</p> <pre><code>[self visibilityForFile:[fileList objectAtIndex:rowIndex]] == NO </code></pre> <p>With some different code, what I am actually trying to do is, as I've got a table every row in the table has a checkbox, when a checkbox in a row is checked the text color of that row will change. I think the code needs to check to see if the checkbox in the row is checked, I just need the code for that. </p> <p><strong>Update</strong></p> <p>This is the Delegate for The App (Core Data).</p> <p>Header File (.h):</p> <pre><code>#import <Cocoa/Cocoa.h> @interface Spark_AppDelegate : NSObject { IBOutlet NSWindow *window; IBOutlet NSMenu *theMenu; NSPersistentStoreCoordinator *persistentStoreCoordinator; NSManagedObjectModel *managedObjectModel; NSManagedObjectContext *managedObjectContext; } - (NSPersistentStoreCoordinator *)persistentStoreCoordinator; - (NSManagedObjectModel *)managedObjectModel; - (NSManagedObjectContext *)managedObjectContext; - (IBAction)saveAction:sender; @end </code></pre> <p>.M file</p> <pre><code>/** Returns the support folder for the application, used to store the Core Data store file. This code uses a folder named "Spark" for the content, either in the NSApplicationSupportDirectory location or (if the former cannot be found), the system's temporary directory. */ - (NSString *)applicationSupportFolder { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES); NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory(); return [basePath stringByAppendingPathComponent:@"Spark"]; } /** Creates, retains, and returns the managed object model for the application by merging all of the models found in the application bundle. */ - (NSManagedObjectModel *)managedObjectModel { if (managedObjectModel != nil) { return managedObjectModel; } managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain]; return managedObjectModel; } /** Returns the persistent store coordinator for the application. This implementation will create and return a coordinator, having added the store for the application to it. (The folder for the store is created, if necessary.) */ - (NSPersistentStoreCoordinator *) persistentStoreCoordinator { if (persistentStoreCoordinator != nil) { return persistentStoreCoordinator; } NSFileManager *fileManager; NSString *applicationSupportFolder = nil; NSURL *url; NSError *error; fileManager = [NSFileManager defaultManager]; applicationSupportFolder = [self applicationSupportFolder]; if ( ![fileManager fileExistsAtPath:applicationSupportFolder isDirectory:NULL] ) { [fileManager createDirectoryAtPath:applicationSupportFolder attributes:nil]; } url = [NSURL fileURLWithPath: [applicationSupportFolder stringByAppendingPathComponent: @"Spark.xml"]]; persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]]; if (![persistentStoreCoordinator addPersistentStoreWithType:NSXMLStoreType configuration:nil URL:url options:nil error:&error]){ [[NSApplication sharedApplication] presentError:error]; } return persistentStoreCoordinator; } /** Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) */ - (NSManagedObjectContext *) managedObjectContext { if (managedObjectContext != nil) { return managedObjectContext; } NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator]; if (coordinator != nil) { managedObjectContext = [[NSManagedObjectContext alloc] init]; [managedObjectContext setPersistentStoreCoordinator: coordinator]; } return managedObjectContext; } /** Returns the NSUndoManager for the application. In this case, the manager returned is that of the managed object context for the application. */ - (NSUndoManager *)windowWillReturnUndoManager:(NSWindow *)window { return [[self managedObjectContext] undoManager]; } /** Performs the save action for the application, which is to send the save: message to the application's managed object context. Any encountered errors are presented to the user. */ - (IBAction) saveAction:(id)sender { NSError *error = nil; if (![[self managedObjectContext] save:&error]) { [[NSApplication sharedApplication] presentError:error]; } } /** Implementation of the applicationShouldTerminate: method, used here to handle the saving of changes in the application managed object context before the application terminates. */ - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender { NSError *error; int reply = NSTerminateNow; if (managedObjectContext != nil) { if ([managedObjectContext commitEditing]) { if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) { // This error handling simply presents error information in a panel with an // "Ok" button, which does not include any attempt at error recovery (meaning, // attempting to fix the error.) As a result, this implementation will // present the information to the user and then follow up with a panel asking // if the user wishes to "Quit Anyway", without saving the changes. // Typically, this process should be altered to include application-specific // recovery steps. BOOL errorResult = [[NSApplication sharedApplication] presentError:error]; if (errorResult == YES) { reply = NSTerminateCancel; } else { int alertReturn = NSRunAlertPanel(nil, @"There Are Un-Saved Changes. Quit anyway?" , @"Quit anyway", @"Cancel", nil); if (alertReturn == NSAlertAlternateReturn) { reply = NSTerminateCancel; } } } } else { reply = NSTerminateCancel; } } return reply; } /** Implementation of dealloc, to release the retained variables. */ - (void) dealloc { [managedObjectContext release], managedObjectContext = nil; [persistentStoreCoordinator release], persistentStoreCoordinator = nil; [managedObjectModel release], managedObjectModel = nil; [super dealloc]; } @end </code></pre>

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