Retrive Core Data objects with case-insensitive comparison
Jun 1, 2012
ios
I’m currently building an iOS app that uses core data for data persistency. It works great, but as I started retrieving entities by name, I noticed that they arrived in a strange order:
- Object 1
- Object 3
- object 2
There is probably some case-sensitive sorting issue showing its ugly face, right. This is the code I used to sort the data:
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES];
The solution was to add selector to the sort, like this:
NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES selector:@selector(caseInsensitiveCompare:)];
And voilá - the list will now look like this:
- Object 1
- object 2
- Object 3
This also works for local-specific characters, like Swedish å, ä and ö.