mirror of
https://github.com/Instagram/IGListKit
synced 2026-05-10 11:00:46 +00:00
02f28fc994
Summary: Replaces #642, #681 Issue ref: #394 Changes from last PR: - Deleted the shared SwiftLint folder, incl. all files (On the plus side, did this in the quest to get this PR in https://github.com/realm/SwiftLint/pull/1513) - Changed the build script such that it runs the user's `HomeBrew` installation of SwiftLint instead of the local copy Integrates SwiftLint into DangerBot. You may want to append a ?w=1 to the end of the files-changed url to exclude whitespace-only changes. - [ ] All tests pass. Demo project builds and runs. - [ ] I added tests, an experiment, or detailed why my change isn't tested. - [ ] I added an entry to the `CHANGELOG.md` for any breaking changes, enhancements, or bug fixes. - [ ] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/.github/CONTRIBUTING.md) Closes https://github.com/Instagram/IGListKit/pull/741 Differential Revision: D5068134 Pulled By: jessesquires fbshipit-source-id: 68d6a57e0072672e38eeb94908d00f26bbd68fbc
87 lines
3 KiB
Swift
87 lines
3 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 LoadMoreViewController: UIViewController, ListAdapterDataSource, UIScrollViewDelegate {
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lazy var adapter: ListAdapter = {
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return ListAdapter(updater: ListAdapterUpdater(), viewController: self)
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}()
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let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())
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lazy var items = Array(0...20)
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var loading = false
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let spinToken = "spinner"
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override func viewDidLoad() {
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super.viewDidLoad()
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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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adapter.scrollViewDelegate = 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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// MARK: ListAdapterDataSource
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func objects(for listAdapter: ListAdapter) -> [ListDiffable] {
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var objects = items as [ListDiffable]
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if loading {
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objects.append(spinToken as ListDiffable)
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}
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return objects
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}
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func listAdapter(_ listAdapter: ListAdapter, sectionControllerFor object: Any) -> ListSectionController {
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if let obj = object as? String, obj == spinToken {
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return spinnerSectionController()
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} else {
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return LabelSectionController()
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}
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}
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func emptyView(for listAdapter: ListAdapter) -> UIView? { return nil }
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// MARK: UIScrollViewDelegate
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func scrollViewWillEndDragging(_ scrollView: UIScrollView,
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withVelocity velocity: CGPoint,
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targetContentOffset: UnsafeMutablePointer<CGPoint>) {
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let distance = scrollView.contentSize.height - (targetContentOffset.pointee.y + scrollView.bounds.height)
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if !loading && distance < 200 {
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loading = true
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adapter.performUpdates(animated: true, completion: nil)
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DispatchQueue.global(qos: .default).async {
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// fake background loading task
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sleep(2)
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DispatchQueue.main.async {
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self.loading = false
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let itemCount = self.items.count
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self.items.append(contentsOf: Array(itemCount..<itemCount + 5))
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self.adapter.performUpdates(animated: true, completion: nil)
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}
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}
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}
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}
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}
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