NSFetchedResultsController + Searchbar

Cheers,

I'm new to iOS development and tried to extend the master detail example of xcode with a searchbar. I already modeled a new entity which has several text fields and one of them is "name". I also created some hundreds of them and they are rendered just fine.

The searchbar is working just fine and I'm able to receive the entered text.

In a filter method triggered by searching I create this:

        let predicate = NSPredicate(format: "name = %@", searchText);
        self.fetchedResultsController.fetchRequest.predicate = predicate
        
        do {
            try self.fetchedResultsController.performFetch()
            tableView.reloadData()
            print("success")
        } catch {
            print("failed")
        }

Afterwards I also reload my table. But the problem is, that the inside fetchedResultsController.fetchedObjects are not affected by my defined predicate. Probably I got the lifecycle wrong or need to clear something first. I did a massive research and couldn't figure out what is going on.

I also tried to set the predicate within the creation of the fetchedResultsController, but also didn't affect anything there. :-(

I also missunderstand the coredata / nsfetchedresultscontroller concept and would be glad to receive any insights and / or hints!

Regards,

Misha