Вопрос по iphone, sorting, xcode – Как отсортировать основные данные извлеченные свойства

20

Error: User Rate Limit ExceededError: User Rate Limit Exceeded

The fetch request associated with the [fetched] property can have a sort ordering, and thus the fetched property may be ordered.

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded Dan

Ваш Ответ

8   ответов
35

/**
 Returns the managed object model for the application.
 If the model doesn't already exist, it is created by merging all of the models found in the application bundle.
 */
- (NSManagedObjectModel *)managedObjectModel {

    if (managedObjectModel != nil) {
        return managedObjectModel;
    }
    managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain];    

    // Find the fetched properties, and make them sorted...
    for (NSEntityDescription *entity in [managedObjectModel entities]) {
        for (NSPropertyDescription *property in [entity properties]) {
            if ([property isKindOfClass:[NSFetchedPropertyDescription class]]) {
                NSFetchedPropertyDescription *fetchedProperty = (NSFetchedPropertyDescription *)property;
                NSFetchRequest *fetchRequest = [fetchedProperty fetchRequest];

                // Only sort by name if the destination entity actually has a "name" field
                if ([[[[fetchRequest entity] propertiesByName] allKeys] containsObject:@"name"]) {
                    NSSortDescriptor *sortByName = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES];
                    [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sortByName]];
                    [sortByName release];
                }
            }
        }
    }

    return managedObjectModel;
}
Error: User Rate Limit Exceeded
0

Error: User Rate Limit ExceededNSManagedObjectError: User Rate Limit Exceeded

+ (void)initialize
{
    if (self != [EntityManagedObjectSubClass class]) return;
    NSManagedObjectModel *managedObjectModel = [NSManagedObjectModel mergedModelFromBundles:nil];
    NSEntityDescription *entityDescription = [managedObjectModel entitiesByName][@"entityName"];
    NSFetchedPropertyDescription *fetchedPropertyDescription = [entityDescription propertiesByName][@"fetchedPropertyName"];
    NSFetchRequest *fetchRequest = [fetchedPropertyDescription fetchRequest];
    NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"sortDescriptorKey" ascending:YES];
    [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sortDescriptor]];
}

Error: User Rate Limit ExceededEntityManagedObjectSubClass, entityName, fetchedPropertyNameError: User Rate Limit ExceededsortDescriptorKeyError: User Rate Limit Exceeded

0

// retrieve the fetched property's fetch request    
let fetchedPropertyRequest = (modelName.entitiesByName["entityName"]!.propertiesByName["fetchedPropertyName"] as! NSFetchedPropertyDescription).fetchRequest

// set up the sort descriptors
let sortDescriptors = [NSSortDescriptor(key: "keyName", ascending: true)]

// add the sort descriptors to the fetch request
fetchedPropertyRequest!.sortDescriptors = sortDescriptors

// retrieve the fetched property's fetch request
let theEntityDescription: NSEntityDescription = modelName.entitiesByName["entityName"]!
let theFetchedPropertyDescription = theEntityDescription.propertiesByName["fetchedPropertyName"]! as! NSFetchedPropertyDescription
let theFetchedPropertyRequest = theFetchedPropertyDescription.fetchRequest

// set up the sort descriptors
let sortDescriptor1 = NSSortDescriptor(key: "keyName", ascending: true)
let theSortDescriptors = [sortDescriptor1]

// add the sort descriptors to the fetch request
theFetchedPropertyRequest!.sortDescriptors = theSortDescriptors

Note: for this example, I force-unwrapped values. Make sure that you account for optional values in your actual code!

5

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded

+ (void)initialize
{
    if(self == [Tier class])
    {
        NSFetchedPropertyDescription *displayLessonPropertyDescription = [[[Tier entityDescription] propertiesByName] objectForKey:@"displayLesson"];
        NSFetchRequest *fetchRequest = [displayLessonPropertyDescription fetchRequest];

        NSSortDescriptor *sortByName = [[NSSortDescriptor alloc] initWithKey:@"displayOrder" ascending:YES];
       [fetchRequest setSortDescriptors:[NSArray arrayWithObject:sortByName]];
        [sortByName release];
    }
}
Error: User Rate Limit Exceeded
Error: User Rate Limit Exceeded
Error: User Rate Limit Exceeded
-1

@property NSString *stringIsaNumber; // in the data model
@property NSNumber *number;

@dynamic stringIsaNumber; 
- (NSNumber *) number ;
{ return [self.stringIsaNumber numberFromString]; }
- (void) setNumber:(NSNumber *)value;
{ self.stringIsaNumber = [NSString stringWithFormat:@"%5i",value) }

13

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded

NSFetchRequest* request = [[NSFetchRequest alloc] init];
NSEntityDescription* entity = [NSEntityDescription entityForName:@"whatYouAreLookingFor"
    inManagedObjectContext:self.managedObjectContext];
[request setEntity:entity];

// here's where you specify the sort
NSSortDescriptor* sortDescriptor = [[NSSortDescriptor alloc]
                                initWithKey:@"name" ascending:YES];
NSArray* sortDescriptors = [[[NSArray alloc] initWithObjects: sortDescriptor, nil] autorelease];
[request setSortDescriptors:sortDescriptors];
[sortDescriptor release];

fetchedResultsController = [[NSFetchedResultsController alloc]
               initWithFetchRequest:request
               managedObjectContext:self.managedObjectContext
                 sectionNameKeyPath:nil
                          cacheName:@"myCache"];
Error: User Rate Limit Exceeded
Error: User Rate Limit Exceeded
5

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceededstackoverflow.com/questions/5638364/…
Error: User Rate Limit Exceeded Daniel Dickison
0

Error: User Rate Limit Exceeded

Error: User Rate Limit Exceeded

Похожие вопросы