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J'ai récemment reçu un exemple de code d'un ami, mais il m'a dit qu'une ligne devait être changée pour que ça marche pour moi. Voici le code:Avec quoi dois-je remplacer ce 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]];
}
}
Je dois remplacer cette ligne:
[self visibilityForFile:[fileList objectAtIndex:rowIndex]] == NO
Avec un code différent, ce que je suis en train d'essayer de le faire est, comme je l'ai une table chaque ligne de la table a une case à cocher, quand une case à cocher dans une rangée est cochée la couleur du texte de cette ligne va changer. Je pense que le code doit vérifier pour voir si la case à cocher dans la rangée est vérifiée, j'ai juste besoin du code pour cela.
Mise à jour
C'est le délégué pour l'application (données de base).
tête de fichier (.h):
#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
fichier .M
/**
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
Le code de votre délégué d'application semble n'avoir aucun code de gestion de table. Si vous n'avez pas écrit le code pour remplir la table, vous devez d'abord écrire cela, puis vous inquiéter de la façon de griser le texte. –
C'est les données de base, je pensais que cela aurait déjà fait cela. – Joshua