IGListBindingSectionControllerDataSource

Objective-C

@protocol IGListBindingSectionControllerDataSource <NSObject>

Swift

protocol ListBindingSectionControllerDataSource : NSObjectProtocol

A protocol that returns data to power cells in an IGListBindingSectionController.


                    
                    
                    -sectionController:viewModelsForObject:

Create an array of view models given a top-level object.

Declaration

Objective-C

- (nonnull NSArray<id<IGListDiffable>> *)
      sectionController:
          (nonnull IGListBindingSectionController *)sectionController
    viewModelsForObject:(nonnull id)object;

Parameters

`sectionController`	The section controller requesting view models.
`object`	The top-level object that powers the section controller.

Return Value

A new array of view models.


                    
                    
                    -sectionController:cellForViewModel:atIndex:

Return a dequeued cell for a given view model.

Note

The section controller will call -bindViewModel: with the provided view model after the cell is dequeued. You should handle cell configuration using this method. However, you can do additional configuration at this stage as well.

Declaration

Objective-C

- (nonnull UICollectionViewCell<IGListBindable> *)
    sectionController:
        (nonnull IGListBindingSectionController *)sectionController
     cellForViewModel:(nonnull id)viewModel
              atIndex:(NSInteger)index;

Parameters

`sectionController`	The section controller requesting a cell.
`viewModel`	The view model for the cell.
`index`	The index of the view model.

Return Value

A dequeued cell.


                    
                    
                    -sectionController:sizeForViewModel:atIndex:

Return a cell size for a given view model.

Declaration

Objective-C

- (CGSize)sectionController:
              (nonnull IGListBindingSectionController *)sectionController
           sizeForViewModel:(nonnull id)viewModel
                    atIndex:(NSInteger)index;

Swift

func sectionController(_ sectionController: IGListBindingSectionController, sizeForViewModel viewModel: Any, at index: Int) -> CGSize

Parameters

`sectionController`	The section controller requesting a size.
`viewModel`	The view model for the cell.
`index`	The index of the view model.

Return Value

A size for the view model.