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feat: add pull to refresh

This commit is contained in:
sunxiaojian 2021-02-02 19:04:24 +08:00
parent 3e1d2bcc16
commit 29439c9746
5 changed files with 205 additions and 34 deletions
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4
Mastodon.xcodeproj/project.pbxproj
View File

@ -16,6 +16,7 @@
2D42FF7E25C82218004A627A /* ActionToolBarContainer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D42FF7D25C82218004A627A /* ActionToolBarContainer.swift */; };
2D42FF8525C8224F004A627A /* HitTestExpandedButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D42FF8425C8224F004A627A /* HitTestExpandedButton.swift */; };
2D42FF8F25C8228A004A627A /* UIButton.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D42FF8E25C8228A004A627A /* UIButton.swift */; };
2D45E5BF25C9549700A6D639 /* PublicTimelineViewModel+State.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D45E5BE25C9549700A6D639 /* PublicTimelineViewModel+State.swift */; };
2D46975E25C2A54100CF4AA9 /* NSLayoutConstraint.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D46975D25C2A54100CF4AA9 /* NSLayoutConstraint.swift */; };
2D46976425C2A71500CF4AA9 /* UIIamge.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D46976325C2A71500CF4AA9 /* UIIamge.swift */; };
2D61335825C188A000CAE157 /* APIService+Persist+Timeline.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2D61335725C188A000CAE157 /* APIService+Persist+Timeline.swift */; };
@ -153,6 +154,7 @@
2D42FF7D25C82218004A627A /* ActionToolBarContainer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ActionToolBarContainer.swift; sourceTree = "<group>"; };
2D42FF8425C8224F004A627A /* HitTestExpandedButton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HitTestExpandedButton.swift; sourceTree = "<group>"; };
2D42FF8E25C8228A004A627A /* UIButton.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIButton.swift; sourceTree = "<group>"; };
2D45E5BE25C9549700A6D639 /* PublicTimelineViewModel+State.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "PublicTimelineViewModel+State.swift"; sourceTree = "<group>"; };
2D46975D25C2A54100CF4AA9 /* NSLayoutConstraint.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NSLayoutConstraint.swift; sourceTree = "<group>"; };
2D46976325C2A71500CF4AA9 /* UIIamge.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UIIamge.swift; sourceTree = "<group>"; };
2D61335725C188A000CAE157 /* APIService+Persist+Timeline.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "APIService+Persist+Timeline.swift"; sourceTree = "<group>"; };
@ -357,6 +359,7 @@
2D76317C25C14DF400929FB9 /* PublicTimelineViewController+StatusProvider.swift */,
2D76316A25C14D4C00929FB9 /* PublicTimelineViewModel.swift */,
2D76318225C14E8F00929FB9 /* PublicTimelineViewModel+Diffable.swift */,
2D45E5BE25C9549700A6D639 /* PublicTimelineViewModel+State.swift */,
);
path = PublicTimeline;
sourceTree = "<group>";
@ -1047,6 +1050,7 @@
2DF123A725C3B0210020F248 /* ActiveLabel.swift in Sources */,
2D76316B25C14D4C00929FB9 /* PublicTimelineViewModel.swift in Sources */,
2D46975E25C2A54100CF4AA9 /* NSLayoutConstraint.swift in Sources */,
2D45E5BF25C9549700A6D639 /* PublicTimelineViewModel+State.swift in Sources */,
2D46976425C2A71500CF4AA9 /* UIIamge.swift in Sources */,
DB8AF55D25C138B7002E6C99 /* UIViewController.swift in Sources */,
2D42FF7E25C82218004A627A /* ActionToolBarContainer.swift in Sources */,

50
Mastodon/Scene/PublicTimeline/PublicTimelineViewController.swift
View File

@ -5,22 +5,22 @@
// Created by sxiaojian on 2021/1/27.
//
import os.log
import UIKit
import AVKit
import Combine
import CoreDataStack
import GameplayKit
import os.log
import UIKit
final class PublicTimelineViewController: UIViewController, NeedsDependency, TimelinePostTableViewCellDelegate {
weak var context: AppContext! { willSet { precondition(!isViewLoaded) } }
weak var coordinator: SceneCoordinator! { willSet { precondition(!isViewLoaded) } }
var disposeBag = Set<AnyCancellable>()
var viewModel: PublicTimelineViewModel!
let refreshControl = UIRefreshControl()
lazy var tableView: UITableView = {
let tableView = UITableView()
tableView.register(TimelinePostTableViewCell.self, forCellReuseIdentifier: String(describing: TimelinePostTableViewCell.self))
@ -30,16 +30,30 @@ final class PublicTimelineViewController: UIViewController, NeedsDependency, Tim
}()
deinit {
os_log("%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
os_log("%{public}s[%{public}ld], %{public}s", (#file as NSString).lastPathComponent, #line, #function)
}
}
extension PublicTimelineViewController {
override func viewDidLoad() {
super.viewDidLoad()
tableView.refreshControl = refreshControl
refreshControl.addTarget(self, action: #selector(PublicTimelineViewController.refreshControlValueChanged(_:)), for: .valueChanged)
// bind refresh control
viewModel.isFetchingLatestTimeline
.receive(on: DispatchQueue.main)
.sink { [weak self] isFetching in
guard let self = self else { return }
if !isFetching {
UIView.animate(withDuration: 0.5) { [weak self] in
guard let self = self else { return }
self.refreshControl.endRefreshing()
}
}
}
.store(in: &disposeBag)
tableView.translatesAutoresizingMaskIntoConstraints = false
tableView.backgroundColor = Asset.Colors.tootDark.color
view.addSubview(tableView)
@ -60,6 +74,7 @@ extension PublicTimelineViewController {
timelinePostTableViewCellDelegate: self
)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
viewModel.fetchLatest()
@ -67,7 +82,7 @@ extension PublicTimelineViewController {
.sink { completion in
switch completion {
case .failure(let error):
os_log("%{public}s[%{public}ld], %{public}s: fetch user timeline latest response error: %s", ((#file as NSString).lastPathComponent), #line, #function, error.localizedDescription)
os_log("%{public}s[%{public}ld], %{public}s: fetch user timeline latest response error: %s", (#file as NSString).lastPathComponent, #line, #function, error.localizedDescription)
case .finished:
break
}
@ -77,12 +92,22 @@ extension PublicTimelineViewController {
}
.store(in: &viewModel.disposeBag)
}
}
// MARK: - Selector
extension PublicTimelineViewController {
@objc private func refreshControlValueChanged(_ sender: UIRefreshControl) {
guard viewModel.stateMachine.enter(PublicTimelineViewModel.State.Loading.self) else {
sender.endRefreshing()
return
}
}
}
// MARK: - UITableViewDelegate
extension PublicTimelineViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
guard let diffableDataSource = viewModel.diffableDataSource else { return 100 }
guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return 100 }
@ -94,12 +119,9 @@ extension PublicTimelineViewController: UITableViewDelegate {
return ceil(frame.height)
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {}
func tableView(_ tableView: UITableView, didEndDisplaying cell: UITableViewCell, forRowAt indexPath: IndexPath) {
guard let diffableDataSource = viewModel.diffableDataSource else { return }
guard let item = diffableDataSource.itemIdentifier(for: indexPath) else { return }

18
Mastodon/Scene/PublicTimeline/PublicTimelineViewModel+Diffable.swift
View File

@ -5,10 +5,10 @@
// Created by sxiaojian on 2021/1/27.
//
import os.log
import UIKit
import CoreData
import CoreDataStack
import os.log
import UIKit
extension PublicTimelineViewModel {
func setupDiffableDataSource(
@ -20,26 +20,27 @@ extension PublicTimelineViewModel {
.autoconnect()
.share()
.eraseToAnyPublisher()
diffableDataSource = TimelineSection.tableViewDiffableDataSource(
for: tableView,
dependency: dependency,
managedObjectContext: fetchedResultsController.managedObjectContext,
timestampUpdatePublisher: timestampUpdatePublisher,
timelinePostTableViewCellDelegate: timelinePostTableViewCellDelegate)
timelinePostTableViewCellDelegate: timelinePostTableViewCellDelegate
)
items.value = []
}
}
// MARK: - NSFetchedResultsControllerDelegate
extension PublicTimelineViewModel: NSFetchedResultsControllerDelegate {
func controller(_ controller: NSFetchedResultsController<NSFetchRequestResult>, didChangeContentWith snapshot: NSDiffableDataSourceSnapshotReference) {
os_log("%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
os_log("%{public}s[%{public}ld], %{public}s", (#file as NSString).lastPathComponent, #line, #function)
let indexes = tootIDs.value
let toots = fetchedResultsController.fetchedObjects ?? []
guard toots.count == indexes.count else { return }
let items: [Item] = toots
.compactMap { toot -> (Int, Toot)? in
guard toot.deletedAt == nil else { return nil }
@ -49,5 +50,4 @@ extension PublicTimelineViewModel: NSFetchedResultsControllerDelegate {
.map { Item.toot(objectID: $0.1.objectID) }
self.items.value = items
}
}

132
Mastodon/Scene/PublicTimeline/PublicTimelineViewModel+State.swift Normal file
View File

@ -0,0 +1,132 @@
//
// PublicTimelineViewModel+State.swift
// Mastodon
//
// Created by sxiaojian on 2021/2/2.
//
import Foundation
import GameplayKit
import MastodonSDK
import os.log
extension PublicTimelineViewModel {
class State: GKState {
weak var viewModel: PublicTimelineViewModel?
init(viewModel: PublicTimelineViewModel) {
self.viewModel = viewModel
}
override func didEnter(from previousState: GKState?) {
os_log("%{public}s[%{public}ld], %{public}s: enter %s, previous: %s", (#file as NSString).lastPathComponent, #line, #function, self.debugDescription, previousState.debugDescription)
}
}
}
extension PublicTimelineViewModel.State {
class Initial: PublicTimelineViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Loading.Type:
return true
default:
return false
}
}
}
class Loading: PublicTimelineViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Fail.Type:
return true
case is Idle.Type:
return true
default:
return false
}
}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
viewModel.fetchLatest()
.receive(on: DispatchQueue.main)
.sink { completion in
switch completion {
case .failure(let error):
os_log("%{public}s[%{public}ld], %{public}s: fetch user timeline latest response error: %s", (#file as NSString).lastPathComponent, #line, #function, error.localizedDescription)
stateMachine.enter(Fail.self)
case .finished:
break
}
} receiveValue: { response in
viewModel.isFetchingLatestTimeline.value = false
let tootsIDs = response.value.map { $0.id }
viewModel.tootIDs.value = tootsIDs
stateMachine.enter(Idle.self)
}
.store(in: &viewModel.disposeBag)
}
}
class Fail: PublicTimelineViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Loading.Type, is LoadingMore.Type:
return true
default:
return false
}
}
}
class Idle: PublicTimelineViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Loading.Type, is LoadingMore.Type:
return true
default:
return false
}
}
}
class LoadingMore: PublicTimelineViewModel.State {
override func isValidNextState(_ stateClass: AnyClass) -> Bool {
switch stateClass {
case is Fail.Type:
return true
case is Idle.Type:
return true
default:
return false
}
}
override func didEnter(from previousState: GKState?) {
super.didEnter(from: previousState)
guard let viewModel = viewModel, let stateMachine = stateMachine else { return }
viewModel.loadMore()
.sink { completion in
switch completion {
case .failure(let error):
stateMachine.enter(Fail.self)
os_log("%{public}s[%{public}ld], %{public}s: load more fail: %s", (#file as NSString).lastPathComponent, #line, #function, error.localizedDescription)
case .finished:
break
}
} receiveValue: { response in
viewModel.isFetchingLatestTimeline.value = false
let tootsIDs = response.value.map { $0.id }
viewModel.tootIDs.value = tootsIDs
stateMachine.enter(Idle.self)
}
.store(in: &viewModel.disposeBag)
}
}
}

35
Mastodon/Scene/PublicTimeline/PublicTimelineViewModel.swift
View File

@ -5,28 +5,39 @@
// Created by sxiaojian on 2021/1/27.
//
import os.log
import UIKit
import GameplayKit
import AlamofireImage
import Combine
import CoreData
import CoreDataStack
import GameplayKit
import MastodonSDK
import AlamofireImage
import os.log
import UIKit
class PublicTimelineViewModel: NSObject {
var disposeBag = Set<AnyCancellable>()
// input
let context: AppContext
let fetchedResultsController: NSFetchedResultsController<Toot>
let isFetchingLatestTimeline = CurrentValueSubject<Bool, Never>(false)
weak var tableView: UITableView?
// output
var diffableDataSource: UITableViewDiffableDataSource<TimelineSection, Item>?
lazy var stateMachine: GKStateMachine = {
let stateMachine = GKStateMachine(states: [
State.Initial(viewModel: self),
State.Loading(viewModel: self),
State.Fail(viewModel: self),
State.Idle(viewModel: self),
State.LoadingMore(viewModel: self),
])
stateMachine.enter(State.Initial.self)
return stateMachine
}()
let tootIDs = CurrentValueSubject<[String], Never>([])
let items = CurrentValueSubject<[Item], Never>([])
var cellFrameCache = NSCache<NSNumber, NSValue>()
@ -49,7 +60,7 @@ class PublicTimelineViewModel: NSObject {
}()
super.init()
self.fetchedResultsController.delegate = self
fetchedResultsController.delegate = self
items
.receive(on: DispatchQueue.main)
@ -57,7 +68,7 @@ class PublicTimelineViewModel: NSObject {
.sink { [weak self] items in
guard let self = self else { return }
guard let diffableDataSource = self.diffableDataSource else { return }
os_log("%{public}s[%{public}ld], %{public}s: items did change", ((#file as NSString).lastPathComponent), #line, #function)
os_log("%{public}s[%{public}ld], %{public}s: items did change", (#file as NSString).lastPathComponent, #line, #function)
var snapshot = NSDiffableDataSourceSnapshot<TimelineSection, Item>()
snapshot.appendSections([.main])
@ -82,14 +93,16 @@ class PublicTimelineViewModel: NSObject {
}
deinit {
os_log("%{public}s[%{public}ld], %{public}s", ((#file as NSString).lastPathComponent), #line, #function)
os_log("%{public}s[%{public}ld], %{public}s", (#file as NSString).lastPathComponent, #line, #function)
}
}
extension PublicTimelineViewModel {
func fetchLatest() -> AnyPublisher<Mastodon.Response.Content<[Mastodon.Entity.Toot]>, Error> {
return context.apiService.publicTimeline(count: 20, domain: "mstdn.jp")
}
func loadMore() -> AnyPublisher<Mastodon.Response.Content<[Mastodon.Entity.Toot]>, Error> {
return context.apiService.publicTimeline(count: 20, domain: "mstdn.jp")
}
}