mirror of
https://github.com/Instagram/IGListKit
synced 2026-04-29 01:17:16 +00:00
b5bc6802ed
Summary: Changes if to guard; Uses forEach instead of for loop. - [x] All tests pass. Demo project builds and runs. - [ ] I added tests, an experiment, or detailed why my change isn't tested. - [x] I have reviewed the [contributing guide](https://github.com/Instagram/IGListKit/blob/master/CONTRIBUTING.md) Changes if to guard; Uses forEach instead of for loop. Closes https://github.com/Instagram/IGListKit/pull/178 Differential Revision: D4153631 Pulled By: rnystrom fbshipit-source-id: 077a64f7c92a8d8acdb3626047b602b12a9ebe17
103 lines
3.3 KiB
Swift
103 lines
3.3 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 Person: IGListDiffable {
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let pk: Int
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let name: String
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init(pk: Int, name: String) {
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self.pk = pk
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self.name = name
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}
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func diffIdentifier() -> NSObjectProtocol {
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return pk as NSNumber
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}
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func isEqual(_ object: IGListDiffable?) -> Bool {
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guard let object = object as? Person else { return false }
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return self.name == object.name
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}
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}
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final class DiffTableViewController: UITableViewController {
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let oldPeople = [
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Person(pk: 1, name: "Kevin"),
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Person(pk: 2, name: "Mike"),
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Person(pk: 3, name: "Ann"),
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Person(pk: 4, name: "Jane"),
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Person(pk: 5, name: "Philip"),
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Person(pk: 6, name: "Mona"),
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Person(pk: 7, name: "Tami"),
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Person(pk: 8, name: "Jesse"),
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Person(pk: 9, name: "Jaed")
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]
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let newPeople = [
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Person(pk: 2, name: "Mike"),
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Person(pk: 10, name: "Marne"),
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Person(pk: 5, name: "Philip"),
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Person(pk: 1, name: "Kevin"),
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Person(pk: 3, name: "Ryan"),
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Person(pk: 8, name: "Jesse"),
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Person(pk: 7, name: "Tami"),
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Person(pk: 4, name: "Jane"),
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Person(pk: 9, name: "Chen")
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]
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lazy var people: [Person] = {
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return self.oldPeople
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}()
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var usingOldPeople = true
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override func viewDidLoad() {
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super.viewDidLoad()
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navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .play,
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target: self,
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action: #selector(DiffTableViewController.onDiff))
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tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
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}
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func onDiff() {
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let from = people
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let to = usingOldPeople ? newPeople : oldPeople
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usingOldPeople = !usingOldPeople
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people = to
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let result = IGListDiffPaths(0, 0, from, to, .equality).forBatchUpdates()
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tableView.beginUpdates()
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tableView.deleteRows(at: result.deletes, with: .fade)
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tableView.insertRows(at: result.inserts, with: .fade)
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result.moves.forEach { tableView.moveRow(at: $0.from, to: $0.to) }
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tableView.endUpdates()
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}
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// MARK: UITableViewDataSource
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override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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return people.count
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}
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override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
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let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
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cell.textLabel?.text = people[indexPath.row].name
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return cell
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}
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}
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