Core Data: Create a simple NSFetchRequest

SomeImplementation.m

NSManagedObjectContext *managedObjectContext = ...;
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
[fetchRequest setEntity:[NSEntityDescription entityForName:@"Entity" inManagedObjectContext:managedObjectContext]];

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"..."];
[fetchRequest setPredicate:predicate];

NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"key" ascending:YES];
[fetchRequest setSortDescriptors:@[sortDescriptor]];