mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-18 23:08:21 +00:00
6bdcac81d8
Summary: Adding a new layout-invalidation API, telling the layout object to query and rebuild the layout for all items in the section controller. This works with `UICollectionViewFlowLayout` and should work with other custom layouts (including our own). Issue fixed: #360, #459 - [x] All tests pass. Demo project builds and runs. - [x] I added tests, an experiment, or detailed why my change isn't tested. - [x] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes. Closes https://github.com/Instagram/IGListKit/pull/499 Reviewed By: jessesquires Differential Revision: D4590274 Pulled By: rnystrom fbshipit-source-id: f87235be4e6c024bf979b831a8938be68895e011
55 lines
1.9 KiB
Swift
55 lines
1.9 KiB
Swift
/**
|
|
Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
|
|
|
|
The examples provided by Facebook are for non-commercial testing and evaluation
|
|
purposes only. Facebook reserves all rights not expressly granted.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
import UIKit
|
|
import IGListKit
|
|
|
|
final class ExpandableSectionController: IGListSectionController, IGListSectionType {
|
|
|
|
var expanded = false
|
|
var object: String?
|
|
|
|
func numberOfItems() -> Int {
|
|
return 1
|
|
}
|
|
|
|
func sizeForItem(at index: Int) -> CGSize {
|
|
let width = collectionContext!.containerSize.width
|
|
let height = expanded ? LabelCell.textHeight(object ?? "", width: width) : LabelCell.singleLineHeight
|
|
return CGSize(width: width, height: height)
|
|
}
|
|
|
|
func cellForItem(at index: Int) -> UICollectionViewCell {
|
|
let cell = collectionContext!.dequeueReusableCell(of: LabelCell.self, for: self, at: index) as! LabelCell
|
|
cell.label.text = object
|
|
return cell
|
|
}
|
|
|
|
func didUpdate(to object: Any) {
|
|
self.object = object as? String
|
|
}
|
|
|
|
func didSelectItem(at index: Int) {
|
|
expanded = !expanded
|
|
UIView.animate(withDuration: 0.5,
|
|
delay: 0,
|
|
usingSpringWithDamping: 0.4,
|
|
initialSpringVelocity: 0.6,
|
|
options: [],
|
|
animations: {
|
|
self.collectionContext?.invalidateLayout(for: self)
|
|
})
|
|
}
|
|
|
|
}
|