Question

I’ve been trying to filter this array (which is full of NSDictionaries) using NSPredicate…

I have a very small amount of code that just isn’t working…

The following code should change label.text to AmyBurnett34, but it doesn’t…

NSPredicate *pred = [NSPredicate predicateWithFormat:@"id = %@", [[mightyPlistDict objectForKey:@"pushesArr"] objectAtIndex:indexPath.row]];

    NSLog(@"%@",pred);

    label.text = [[[twitterInfo filteredArrayUsingPredicate:pred] lastObject] objectForKey:@"screen_name"];
    NSLog(@"%@",twitterInfo);

And here is what gets NSLoged…

2012-08-05 11:39:45.929 VideoPush[1711:707] id == "101323790"
2012-08-05 11:39:45.931 VideoPush[1711:707] (
        {
        id = 101323790;
        "screen_name" = AmyBurnett34;
    },
        {
        id = 25073877;
        "screen_name" = realDonaldTrump;
    },
        {
        id = 159462573;
        "screen_name" = ecomagination;
    },
        {
        id = 285234969;
        "screen_name" = "UCB_Properties";
    },
        {
        id = 14315150;
        "screen_name" = MichaelHyatt;
    }
)

Just for the heads up if you also NSLog this… the array is empty…

NSLog(%@,[twitterInfo filteredArrayUsingPredicate:pred]);

Answer 1

The problem is that your predicate is using comparing with a string and your content is using a number. Try this:

NSNumber *idNumber = [NSNumber numberWithLongLong:[[[mightyPlistDict objectForKey:@"pushesArr"] objectAtIndex:indexPath.row] longLongValue]];
NSPredicate *pred = [NSPredicate predicateWithFormat:@"id = %@", idNumber];