UITableViewCell traverses through all its descendant views and adjusts their background color accordingly either to [UIColor clearColor], although potentially it could use the same color as the selection highlight itself. After selection, the same trick is performed again in reverse, putting all the backgrounds back as they used to be. But in our case, we don't want to have the background color disappearing so we reset it after highlighting or selection is done.
Initial attempt to get display traits working with ASEnvironment.
To get proper ASDisplayTraits support, you must use an ASViewController. The ASViewController implements UITraitCollection-related methods (`traitCollectionDidChange:`, `willTransitionToTraitCollection:withTransitionCoordinator:`, viewWillTransitionToSize:withTransitionCoordinator`) to update the internal ASDisplayTraits and propagate them to subnodes.
ASTableNode and ASCollectionNode don't actually have their cells as subnodes, so a little bit of trickery is involved (on `setEnvironment:` the table/collection node gets its data controllers completedNodes and propagates the new traits. see `ASDisplayTraitsCollectionTableSetEnvironmentState`). The data controller also passes the current display traits when creating new cells.
ASViewController also supports the ability to return a custom set of display traits. So if you have a modal dialog that should always be told it is in a compact size class, you can set the override block before displaying the VC.
A new example, called Display Traits, has been added. It shows how display traits can be used in a ASViewController with a normal ASDisplayNode as its root, as well as in ASViewControllers hosting table nodes and collection nodes. There is also an example of overriding the default display traits of a VC.
Please provide feedback!
- overrode the -(void)fetchData method in PhotoCellNode.m to download the photo’s comments. This method gets called with the PhotoCellNode enters ASInterfaceStateFetchData, which is set by the rangeController.
- UIKIT COMPARISON: I left the comment bulk download (for all photos in a page load) in the PhotoFeedViewController side for UIKit because when implemented in the PhotoTableViewCell, each cell jumped around as it changed size when it came on screen.
- minor appearance updates
- updated color scheme
- fixed status bar style to darkBackgroundColor
- cleaned up layoutSpecThatFits: in PhotoCellNode
