NSPredicate between two dates returns 0 results - ios

Question

I am trying to retrieve some results based on the "begin" (NSDate) field. However, it always returns 0 results.
And I can't figure out what I am doing wrong. I am guessing it has something to do with the NSDate type but I have double checked and everything seems correct.
I have checked this answer, and this one also. But to no avail…
Any help would be greatly appreciated.
Here is the definition in the model file :
#property (nonatomic, retain) NSDate * begin;
And here is the code from which I call the fetch Request.
-(void)getCalendarListForDatesFrom:(NSDate *)startDate
To:(NSDate *)endDate
inViews:(NSArray *)daysArray
{
// Reset dates to Midnight
NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
NSUInteger preservedComponents = (NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit);
startDate = [calendar dateFromComponents:[calendar components:preservedComponents
fromDate:startDate ]
];
endDate = [calendar dateFromComponents:[calendar components:preservedComponents
fromDate:endDate ]
];
NSLog(#"Get Events for dates %# to %#", startDate, endDate);
_isRetrievingData = YES;
NSManagedObjectContext *MOC;
NSPredicate *predicate;
NSError *error = nil;
NSString *entityName = #"CalendarEvent";
//AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
//BOOL doIHaveConnexion = [appDelegate getConnexion];
MOC = self.managedObjectContext;
NSEntityDescription *entity = [NSEntityDescription entityForName:entityName
inManagedObjectContext:MOC ];
// Fetch Request
NSFetchRequest *fetchRequest;
fetchRequest = [[NSFetchRequest alloc] init];
if (!fetchRequest)
{
fetchRequest = [[NSFetchRequest alloc] init];
}
[fetchRequest setEntity:entity];
// Filter
NSLog(#"Filter results between dates %# and %#", startDate, endDate);
predicate = [NSPredicate predicateWithFormat:#"(%K >= %#) AND (%K <= %#)", #"begin", startDate, #"begin", endDate];
//predicate = [NSPredicate predicateWithFormat:#"(%K > %#)", #"begin", [NSDate date]];
NSLog(#"PREDICATE = %#", predicate);
NSLog(#"Set Predicate");
[fetchRequest setPredicate:predicate];
NSLog(#"Set Sort Descriptor");
NSSortDescriptor *beginDateDescriptor = [[NSSortDescriptor alloc] initWithKey:#"begin"
ascending:YES
selector:#selector(localizedCaseInsensitiveCompare:)
];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:beginDateDescriptor, nil];
NSLog(#"Fetch");
[fetchRequest setSortDescriptors:sortDescriptors];
NSLog(#"Init Fetch");
// Initialize Fetched Results Controller
if (!self.fetchedResultsController)
{
self.fetchedResultsController = [[NSFetchedResultsController alloc]
initWithFetchRequest:fetchRequest
managedObjectContext:MOC
sectionNameKeyPath:nil
cacheName:nil ];
}
NSLog(#"Perform Fetch");
// Perform Fetch
[self.fetchedResultsController performFetch:&error];
NSArray *calEvents = [MOC executeFetchRequest:fetchRequest error:&error];
currentCalEvents = [calEvents mutableCopy];
if (error)
{
NSLog(#"Unable to execute fetch request.");
NSLog(#"%#, %#", error, error.localizedDescription);
}
else
{
NSLog(#"TOTAL CALENDAR EVENTS %lu",(unsigned long)[calEvents count]);
NSLog(#"currentCalEvents = %#", currentCalEvents);
[self addCalendarEventsToDays: daysArray];
}
fetchRequest = nil;
}
Here are the logs from the console :
Filter results between dates 2015-01-02 23:00:00 +0000 and 2015-01-07 23:00:00 +0000
PREDICATE = begin >= CAST(441932400.000000, "NSDate") AND begin <= CAST(442364400.000000, "NSDate")
Set Predicate
Set Sort Descriptor
Fetch
Init Fetch
Perform Fetch
TOTAL CALENDAR EVENTS 0