A presentation given at CocoaHeads Boston on a framework for encapsulating, combining, and transforming data from various sources (Core Data, WebService, etc.) and easily displaying it in UITableViews and UICollectionViews on iOS.

1. RZCollectionList
Transforming and Displaying Data in TableViews and
CollectionViews
Joe Goullaud
joe@raizlabs.com
ADN/Twitter: @jgoullaud

2. Overview
• What does it do?
• How does it help?
• How do you use it?
• ... and of course, Demo!

3. What is RZCollectionList?
A framework for encapsulating, combining, and
transforming data from various sources and
displaying it in Collection-based Views on iOS.

4. RZCollectionList
RZCollectionList
Source Lists Transform Lists
RZArrayCollectionList RZSortedCollectionList
RZFetchedCollectionList RZFilteredCollectionList
RZCompositeCollectionList
Combination Lists

5. RZCollectionListObserver
collectionList:(id<RZCollectionList>)collectionList
didChangeObject:(id)object
atIndexPath:(NSIndexPath*)indexPath
forChangeType:(RZCollectionListChangeType)type
newIndexPath:(NSIndexPath*)newIndexPath
collectionList:(id<RZCollectionList>)collectionList
didChangeSection:(id<RZCollectionListSectionInfo>)sectionInfo
atIndex:(NSUInteger)sectionIndex
forChangeType:(RZCollectionListChangeType)type
collectionListWillChangeContent:(id<RZCollectionList>)collectionList
collectionListDidChangeContent:(id<RZCollectionList>)collectionList

6. RZCollectionList
Data Sources
RZCollectionListTableViewDataSource
RZCollectionListCollectionViewDataSource
• Observe collection lists
• Automatically update views

7. Using RZCollectionList
NSFetchedResultsController
RZFetchedCollectionList UITableView
RZCollectionListTableViewDataSource

8. 3 OBJs and 1 IMP
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"ListItem"
sortDescriptorKey:@"itemName"
ascending:YES];
RZFetchedCollectionList *fetchedList = [[RZFetchedCollectionList alloc]
initWithFetchRequest:request
managedObjectContext:moc
sectionNameKeyPath:@"subtitle"
cacheName:nil];
RZCollectionListTableViewDataSource *listDataSource =
[[RZCollectionListTableViewDataSource alloc] initWithTableView:tableView
collectionList:fetchedList
delegate:self];
...
- (UITableViewCell*)tableView:(UITableView *)tableView
cellForObject:(id)object
atIndexPath:(NSIndexPath *)indexPath
{
...
}

9. Transforming Lists
RZArrayCollectionList
RZCollectionListTableViewDataSource

10. Transforming Lists
RZArrayCollectionList
RZFilteredCollectionList
RZCollectionListTableViewDataSource

11. Combining Lists
RZArrayCollectionList RZFetchedCollectionList
RZCompositeCollectionList
RZCollectionListTableViewDataSource

12. DEMO

13. RZCollectionList Links
GitHub Project:
http://github.com/Raizlabs/RZCollectionList
Bugs and Feature Requests:
http://github.com/Raizlabs/RZCollectionList/issues
More iOS Frameworks & Components:
http://raizlabs.github.com