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Editorial Team
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Asked: 2026-05-18T09:41:28+00:00

EDIT : I have altered the NSPredicate as recommended so that my fetch code

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EDIT:
I have altered the NSPredicate as recommended so that my fetch code look like so. Having printed to the UITextView like this, when I press load it spits out the following: 

<NSManagedObject: 0x1c7cf0>(entity: DatedText; id: 0x1420c0 <x - coredata://B52D4F88-0210-4AE2-9DA6-C05ED64FE389/DatedText/p12> ; data: <fault>)

So either its not getting any data data because it hasn’t been saved/loaded correctly or I am trying to get the loaded result into a UITextView the incorrect way. Any ideas?

NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
    NSEntityDescription *testEntity = [NSEntityDescription entityForName:@"DatedText" inManagedObjectContext:self.managedObjectContext];
    [fetch setEntity:testEntity]; 
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"dateSaved == %@", datePicker.date];
    [fetch setPredicate:pred];

    NSError *fetchError = nil;
    NSArray *fetchedObjs = [self.managedObjectContext executeFetchRequest:fetch error:&fetchError];
    if (fetchError != nil) {
        NSLog(@" fetchError=%@,details=%@",fetchError,fetchError.userInfo);
        return nil;
    }
    NSString *object = [NSString stringWithFormat:@"%@",[fetchedObjs objectAtIndex:0]];
    noteTextView.text = object;

I have been having all sorts of problems working out how to use Core Data, so I have gone back to basics, new window based ipad project using core data.

I have added a view and some code which doesn’t work, hehe. Im basically trying to save some text to a date, then when going back to that date, the text which was previously saved will be shown again.

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1 Answer

  1. Editorial Team

    I checked your project and aside from having to synthesize the CoreData properties, I also just noticed you were trying to assign an NSArray to your fetch predicate, but it actually expects an NSPredicate object. You should use this instead:

    NSPredicate *pred = [NSPredicate predicateWithFormat:@"(dateSaved == %@)", datePicker.date];
[fetch setPredicate:pred];

    If you want to set more than 1 predicate you should do that on your predicate string i.e.

    NSPredicate *pred = [NSPredicate predicateWithFormat:@"(dateSaved == %@) AND (dateSaved <= %@", datePicker.date, [NSDate date]];

    Cheers,
    Rog

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