mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-10 11:00:46 +00:00
59242c5b7e
Summary: Closes https://github.com/Instagram/IGListKit/pull/173 Differential Revision: D4143811 Pulled By: rnystrom fbshipit-source-id: 879ba9fa858648677fd2e3750bcf1815ac37ef18
91 lines
3.1 KiB
Swift
91 lines
3.1 KiB
Swift
/**
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Copyright (c) 2016-present, Facebook, Inc. All rights reserved.
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The examples provided by Facebook are for non-commercial testing and evaluation
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purposes only. Facebook reserves all rights not expressly granted.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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import UIKit
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import IGListKit
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final class EmptyViewController: UIViewController, IGListAdapterDataSource, RemoveSectionControllerDelegate {
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lazy var adapter: IGListAdapter = {
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return IGListAdapter(updater: IGListAdapterUpdater(), viewController: self, workingRangeSize: 0)
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}()
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let collectionView = IGListCollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
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let emptyLabel: UILabel = {
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let label = UILabel()
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label.numberOfLines = 0
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label.textAlignment = .center
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label.text = "No more data!"
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label.backgroundColor = .clear
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return label
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}()
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var tally = 4
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var data = [
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1,
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2,
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3,
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4
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]
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override func viewDidLoad() {
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super.viewDidLoad()
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navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add,
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target: self,
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action: #selector(EmptyViewController.onAdd))
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collectionView.backgroundColor = UIColor(white: 0.9, alpha: 1)
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view.addSubview(collectionView)
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adapter.collectionView = collectionView
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adapter.dataSource = self
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}
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override func viewDidLayoutSubviews() {
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super.viewDidLayoutSubviews()
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collectionView.frame = view.bounds
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}
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func onAdd() {
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data.append(tally + 1)
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tally += 1
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adapter.performUpdates(animated: true, completion: nil)
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}
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//MARK: IGListAdapterDataSource
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func objects(for listAdapter: IGListAdapter) -> [IGListDiffable] {
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return data as [IGListDiffable]
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}
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func listAdapter(_ listAdapter: IGListAdapter, sectionControllerFor object: Any) -> IGListSectionController {
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let sectionController = RemoveSectionController()
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sectionController.delegate = self
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return sectionController
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}
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func emptyView(for listAdapter: IGListAdapter) -> UIView? {
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return emptyLabel
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}
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//MARK: RemoveSectionControllerDelegate
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func removeSectionControllerWantsRemoved(_ sectionController: RemoveSectionController) {
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let section = adapter.section(for: sectionController)
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guard let object = adapter.object(atSection: section) as? Int, let index = data.index(of: object) else { return }
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data.remove(at: index)
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adapter.performUpdates(animated: true, completion: nil)
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}
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}
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