ASRangeControllerDataSource Protocol Reference
| Conforms to | NSObject |
|---|---|
| Declared in | ASRangeController.h |
Overview
Data source for ASRangeController.
Allows the range controller to perform external queries on the range. Ex. range nodes, visible index paths, and viewport size.
– visibleNodeIndexPathsForRangeController:
required method
Sender.
- (NSArray<NSIndexPath*> *)visibleNodeIndexPathsForRangeController:(ASRangeController *)rangeControllerParameters
rangeController |
Sender. |
|---|
Return Value
an array of index paths corresponding to the nodes currently visible onscreen (i.e., the visible range).
Declared In
ASRangeController.h
– scrollDirectionForRangeController:
required method
Sender.
- (ASScrollDirection)scrollDirectionForRangeController:(ASRangeController *)rangeControllerParameters
rangeController |
Sender. |
|---|
Return Value
the current scroll direction of the view using this range controller.
Declared In
ASRangeController.h
– viewportSizeForRangeController:
required method
Sender.
- (CGSize)viewportSizeForRangeController:(ASRangeController *)rangeControllerParameters
rangeController |
Sender. |
|---|
Return Value
the receiver’s viewport size (i.e., the screen space occupied by the visible range).
Declared In
ASRangeController.h
– interfaceStateForRangeController:
required method
Sender.
- (ASInterfaceState)interfaceStateForRangeController:(ASRangeController *)rangeControllerParameters
rangeController |
Sender. |
|---|
Return Value
the ASInterfaceState of the node that this controller is powering. This allows nested range controllers to collaborate with one another, as an outer controller may set bits in .interfaceState such as Visible. If this controller is an orthogonally scrolling element, it waits until it is visible to preload outside the viewport.
Declared In
ASRangeController.h