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Improve ImageCache loading 

Keep track of the number of requests and only cancel the underlying
URLSessionTask if there are no concrete requsts remaining.

Closes #81
This commit is contained in:
Shadowfacts 2020-01-25 10:06:27 -05:00
parent 3220436893
commit d6ae51c02f
20 changed files with 188 additions and 99 deletions
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90
Tusker/Caching/ImageCache.swift
View File

@ -12,13 +12,13 @@ import Cache
class ImageCache {
static let avatars = ImageCache(name: "Avatars", memoryExpiry: .seconds(60 * 60), diskExpiry: .seconds(60 * 60 * 24))
static let headers = ImageCache(name: "Headers", memoryExpiry: .seconds(60 * 60), diskExpiry: .seconds(60 * 60 * 24))
static let headers = ImageCache(name: "Headers", memoryExpiry: .seconds(60 * 5), diskExpiry: .seconds(60 * 60))
static let attachments = ImageCache(name: "Attachments", memoryExpiry: .seconds(60 * 2))
static let emojis = ImageCache(name: "Emojis", memoryExpiry: .seconds(60 * 5), diskExpiry: .seconds(60 * 60))
let cache: Cache<Data>
var requests = [URL: Request]()
var requests = [URL: RequestGroup]()
init(name: String, memoryExpiry expiry: Expiry) {
let storage = MemoryStorage<Data>(config: MemoryConfig(expiry: expiry))
@ -36,20 +36,22 @@ class ImageCache {
self.cache = .hybrid(HybridStorage(memoryStorage: memory, diskStorage: disk))
}
func get(_ url: URL, completion: ((Data?) -> Void)?) {
func get(_ url: URL, completion: ((Data?) -> Void)?) -> Request? {
let key = url.absoluteString
if (try? cache.existsObject(forKey: key)) ?? false,
let data = try? cache.object(forKey: key) {
completion?(data)
return nil
} else {
if let completion = completion, let request = requests[url] {
request.callbacks.append(completion)
if let completion = completion, let group = requests[url] {
return group.addCallback(completion)
} else {
let request = Request(url: url, completion: completion)
requests[url] = request
request.run { (data) in
let group = RequestGroup(url: url)
let request = group.addCallback(completion)
group.run { (data) in
try? self.cache.setObject(data, forKey: key)
}
return request
}
}
}
@ -58,24 +60,23 @@ class ImageCache {
return try? cache.object(forKey: url.absoluteString)
}
func cancel(_ url: URL) {
requests[url]?.cancel()
func cancelWithoutCallback(_ url: URL) {
requests[url]?.cancelWithoutCallback()
}
class Request {
class RequestGroup {
let url: URL
var task: URLSessionDataTask?
var callbacks: [(Data?) -> Void]
private var task: URLSessionDataTask?
private var requests = [Request]()
init(url: URL, completion: ((Data?) -> Void)?) {
if let completion = completion {
self.callbacks = [completion]
} else {
self.callbacks = []
}
init(url: URL) {
self.url = url
}
deinit {
task?.cancel()
}
func run(cache: @escaping (Data) -> Void) {
task = URLSession.shared.dataTask(with: url, completionHandler: { (data, response, error) in
guard error == nil, let data = data else {
@ -88,13 +89,56 @@ class ImageCache {
task!.resume()
}
func cancel() {
task?.cancel()
complete(with: nil)
private func updatePriority() {
task?.priority = max(1.0, URLSessionTask.defaultPriority + 0.1 * Float(requests.filter { !$0.cancelled }.count))
}
func addCallback(_ completion: ((Data?) -> Void)?) -> Request {
let request = Request(callback: completion)
requests.append(request)
updatePriority()
return request
}
func cancelWithoutCallback() {
if let request = requests.first(where: { $0.callback == nil && !$0.cancelled }) {
request.cancel()
updatePriority()
}
}
fileprivate func requestCancelled() {
let remaining = requests.filter { !$0.cancelled }.count
if remaining <= 0 {
task?.cancel()
complete(with: nil)
} else {
updatePriority()
}
}
func complete(with data: Data?) {
callbacks.forEach { $0(data) }
requests.filter { !$0.cancelled }.forEach {
if let callback = $0.callback {
callback(data)
}
}
}
}
class Request {
weak var group: RequestGroup?
private(set) var callback: ((Data?) -> Void)?
private(set) var cancelled: Bool = false
init(callback: ((Data?) -> Void)?) {
self.callback = callback
}
func cancel() {
cancelled = true
callback = nil
group?.requestCancelled()
}
}

18
Tusker/Screens/Attachment/AttachmentViewController.swift
View File

@ -15,6 +15,8 @@ class AttachmentViewController: UIViewController {
var largeImageVC: LargeImageViewController?
var loadingVC: LoadingViewController?
var attachmentRequest: ImageCache.Request?
private var initialControlsVisible: Bool = true
var controlsVisible: Bool {
get {
@ -51,15 +53,25 @@ class AttachmentViewController: UIViewController {
} else {
loadingVC = LoadingViewController()
embedChild(loadingVC!)
ImageCache.attachments.get(attachment.url) { [weak self] (data) in
attachmentRequest = ImageCache.attachments.get(attachment.url) { [weak self] (data) in
guard let self = self else { return }
self.attachmentRequest = nil
DispatchQueue.main.async {
self?.loadingVC?.removeViewAndController()
self?.createLargeImage(data: data!)
self.loadingVC?.removeViewAndController()
self.createLargeImage(data: data!)
}
}
}
}
override func didMove(toParent parent: UIViewController?) {
super.didMove(toParent: parent)
if parent == nil {
attachmentRequest?.cancel()
}
}
func createLargeImage(data: Data) {
guard let image = UIImage(data: data) else { return }
largeImageVC = LargeImageViewController(image: image, description: attachment.description, sourceInfo: nil)

8
Tusker/Screens/Bookmarks/BookmarksTableViewController.swift
View File

@ -159,9 +159,9 @@ extension BookmarksTableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
for indexPath in indexPaths {
guard let status = mastodonController.cache.status(for: statuses[indexPath.row].id) else { continue }
ImageCache.avatars.get(status.account.avatar, completion: nil)
_ = ImageCache.avatars.get(status.account.avatar, completion: nil)
for attachment in status.attachments where attachment.kind == .image {
ImageCache.attachments.get(attachment.url, completion: nil)
_ = ImageCache.attachments.get(attachment.url, completion: nil)
}
}
}
@ -169,9 +169,9 @@ extension BookmarksTableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, cancelPrefetchingForRowsAt indexPaths: [IndexPath]) {
for indexPath in indexPaths {
guard let status = mastodonController.cache.status(for: statuses[indexPath.row].id) else { continue }
ImageCache.avatars.cancel(status.account.avatar)
ImageCache.avatars.cancelWithoutCallback(status.account.avatar)
for attachment in status.attachments where attachment.kind == .image {
ImageCache.attachments.cancel(attachment.url)
ImageCache.attachments.cancelWithoutCallback(attachment.url)
}
}
}

8
Tusker/Screens/Conversation/ConversationTableViewController.swift
View File

@ -170,9 +170,9 @@ extension ConversationTableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
for indexPath in indexPaths {
guard let status = mastodonController.cache.status(for: statuses[indexPath.row].id) else { continue }
ImageCache.avatars.get(status.account.avatar, completion: nil)
_ = ImageCache.avatars.get(status.account.avatar, completion: nil)
for attachment in status.attachments {
ImageCache.attachments.get(attachment.url, completion: nil)
_ = ImageCache.attachments.get(attachment.url, completion: nil)
}
}
}
@ -180,9 +180,9 @@ extension ConversationTableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, cancelPrefetchingForRowsAt indexPaths: [IndexPath]) {
for indexPath in indexPaths {
guard let status = mastodonController.cache.status(for: statuses[indexPath.row].id) else { continue }
ImageCache.avatars.cancel(status.account.avatar)
ImageCache.avatars.cancelWithoutCallback(status.account.avatar)
for attachment in status.attachments {
ImageCache.attachments.cancel(attachment.url)
ImageCache.attachments.cancelWithoutCallback(attachment.url)
}
}
}

4
Tusker/Screens/Notifications/NotificationsTableViewController.swift
View File

@ -240,7 +240,7 @@ extension NotificationsTableViewController: UITableViewDataSourcePrefetching {
for indexPath in indexPaths {
for notificationID in groups[indexPath.row].notificationIDs {
guard let notification = mastodonController.cache.notification(for: notificationID) else { continue }
ImageCache.avatars.get(notification.account.avatar, completion: nil)
_ = ImageCache.avatars.get(notification.account.avatar, completion: nil)
}
}
}
@ -249,7 +249,7 @@ extension NotificationsTableViewController: UITableViewDataSourcePrefetching {
for indexPath in indexPaths {
for notificationID in groups[indexPath.row].notificationIDs {
guard let notification = mastodonController.cache.notification(for: notificationID) else { continue }
ImageCache.avatars.cancel(notification.account.avatar)
ImageCache.avatars.cancelWithoutCallback(notification.account.avatar)
}
}
}

4
Tusker/Screens/Profile/MyProfileTableViewController.swift
View File

@ -21,8 +21,8 @@ class MyProfileTableViewController: ProfileTableViewController {
mastodonController.getOwnAccount { (account) in
self.accountID = account.id
ImageCache.avatars.get(account.avatar, completion: { (data) in
guard let data = data, let image = UIImage(data: data) else { return }
_ = ImageCache.avatars.get(account.avatar, completion: { [weak self] (data) in
guard let self = self, let data = data, let image = UIImage(data: data) else { return }
DispatchQueue.main.async {
let size = CGSize(width: 30, height: 30)
let tabBarImage = UIGraphicsImageRenderer(size: size).image { (_) in

8
Tusker/Screens/Profile/ProfileTableViewController.swift
View File

@ -294,9 +294,9 @@ extension ProfileTableViewController: UITableViewDataSourcePrefetching {
for indexPath in indexPaths where indexPath.section > 1 {
let statusID = timelineSegments[indexPath.section - 2][indexPath.row].id
guard let status = mastodonController.cache.status(for: statusID) else { continue }
ImageCache.avatars.get(status.account.avatar, completion: nil)
_ = ImageCache.avatars.get(status.account.avatar, completion: nil)
for attachment in status.attachments {
ImageCache.attachments.get(attachment.url, completion: nil)
_ = ImageCache.attachments.get(attachment.url, completion: nil)
}
}
}
@ -305,9 +305,9 @@ extension ProfileTableViewController: UITableViewDataSourcePrefetching {
for indexPath in indexPaths where indexPath.section > 1 {
let statusID = timelineSegments[indexPath.section - 2][indexPath.row].id
guard let status = mastodonController.cache.status(for: statusID) else { continue }
ImageCache.avatars.cancel(status.account.avatar)
ImageCache.avatars.cancelWithoutCallback(status.account.avatar)
for attachment in status.attachments {
ImageCache.attachments.cancel(attachment.url)
ImageCache.attachments.cancelWithoutCallback(attachment.url)
}
}
}

8
Tusker/Screens/Timeline/TimelineTableViewController.swift
View File

@ -165,9 +165,9 @@ extension TimelineTableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, prefetchRowsAt indexPaths: [IndexPath]) {
for indexPath in indexPaths {
guard let status = mastodonController.cache.status(for: statusID(for: indexPath)) else { continue }
ImageCache.avatars.get(status.account.avatar, completion: nil)
_ = ImageCache.avatars.get(status.account.avatar, completion: nil)
for attachment in status.attachments {
ImageCache.attachments.get(attachment.url, completion: nil)
_ = ImageCache.attachments.get(attachment.url, completion: nil)
}
}
}
@ -175,9 +175,9 @@ extension TimelineTableViewController: UITableViewDataSourcePrefetching {
func tableView(_ tableView: UITableView, cancelPrefetchingForRowsAt indexPaths: [IndexPath]) {
for indexPath in indexPaths {
guard let status = mastodonController.cache.status(for: statusID(for: indexPath)) else { continue }
ImageCache.avatars.cancel(status.account.avatar)
ImageCache.avatars.cancelWithoutCallback(status.account.avatar)
for attachment in status.attachments {
ImageCache.attachments.cancel(attachment.url)
ImageCache.attachments.cancelWithoutCallback(attachment.url)
}
}
}

14
Tusker/Views/Account Cell/AccountTableViewCell.swift
View File

@ -19,7 +19,7 @@ class AccountTableViewCell: UITableViewCell {
var accountID: String!
var avatarURL: URL?
var avatarRequest: ImageCache.Request?
override func awakeFromNib() {
super.awakeFromNib()
@ -44,9 +44,9 @@ class AccountTableViewCell: UITableViewCell {
fatalError("Missing cached account \(accountID)")
}
self.avatarURL = account.avatar
ImageCache.avatars.get(account.avatar) { (data) in
guard let data = data, self.avatarURL == account.avatar else { return }
avatarRequest = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, let data = data, self.accountID == accountID else { return }
self.avatarRequest = nil
DispatchQueue.main.async {
self.avatarImageView.image = UIImage(data: data)
}
@ -57,6 +57,12 @@ class AccountTableViewCell: UITableViewCell {
updateUIForPrefrences()
}
override func prepareForReuse() {
super.prepareForReuse()
avatarRequest?.cancel()
}
}
extension AccountTableViewCell: SelectableTableViewCell {

11
Tusker/Views/Account Detail/LargeAccountDetailView.swift
View File

@ -15,6 +15,8 @@ class LargeAccountDetailView: UIView {
var displayNameLabel = UILabel()
var usernameLabel = UILabel()
var avatarRequest: ImageCache.Request?
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
@ -49,6 +51,10 @@ class LargeAccountDetailView: UIView {
NotificationCenter.default.addObserver(self, selector: #selector(updateUIForPreferences), name: .preferencesChanged, object: nil)
}
deinit {
avatarRequest?.cancel()
}
override func layoutSubviews() {
super.layoutSubviews()
@ -63,8 +69,9 @@ class LargeAccountDetailView: UIView {
displayNameLabel.text = account.realDisplayName
usernameLabel.text = "@\(account.acct)"
ImageCache.avatars.get(account.avatar) { (data) in
guard let data = data else { return }
avatarRequest = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, let data = data else { return }
self.avatarRequest = nil
DispatchQueue.main.async {
self.avatarImageView.image = UIImage(data: data)
}

13
Tusker/Views/Attachments/AttachmentView.swift
View File

@ -24,6 +24,8 @@ class AttachmentView: UIImageView, GIFAnimatable {
var attachment: Attachment!
var index: Int!
private var attachmentRequest: ImageCache.Request?
var gifData: Data?
public lazy var animator: Animator? = Animator(withDelegate: self)
@ -37,6 +39,10 @@ class AttachmentView: UIImageView, GIFAnimatable {
loadAttachment()
}
deinit {
attachmentRequest?.cancel()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
@ -71,8 +77,9 @@ class AttachmentView: UIImageView, GIFAnimatable {
}
func loadImage() {
ImageCache.attachments.get(attachment.url) { [weak self] (data) in
attachmentRequest = ImageCache.attachments.get(attachment.url) { [weak self] (data) in
guard let self = self, let data = data else { return }
self.attachmentRequest = nil
DispatchQueue.main.async {
if self.attachment.url.pathExtension == "gif" {
self.animate(withGIFData: data)
@ -87,12 +94,14 @@ class AttachmentView: UIImageView, GIFAnimatable {
}
func loadVideo() {
let attachmentURL = self.attachment.url
DispatchQueue.global(qos: .userInitiated).async {
let asset = AVURLAsset(url: self.attachment.url)
let asset = AVURLAsset(url: attachmentURL)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
guard let image = try? generator.copyCGImage(at: CMTime(seconds: 0, preferredTimescale: 1), actualTime: nil) else { return }
DispatchQueue.main.async {
guard self.attachment.url == attachmentURL else { return }
self.image = UIImage(cgImage: image)
}
}

10
Tusker/Views/Compose Status Reply/ComposeStatusReplyView.swift
View File

@ -18,10 +18,16 @@ class ComposeStatusReplyView: UIView {
@IBOutlet weak var usernameLabel: UILabel!
@IBOutlet weak var statusContentTextView: StatusContentTextView!
var avatarRequest: ImageCache.Request?
static func create() -> ComposeStatusReplyView {
return UINib(nibName: "ComposeStatusReplyView", bundle: nil).instantiate(withOwner: nil, options: nil).first as! ComposeStatusReplyView
}
deinit {
avatarRequest?.cancel()
}
override func awakeFromNib() {
super.awakeFromNib()
@ -39,8 +45,8 @@ class ComposeStatusReplyView: UIView {
statusContentTextView.overrideMastodonController = mastodonController
statusContentTextView.statusID = status.id
ImageCache.avatars.get(status.account.avatar) { (data) in
guard let data = data else { return }
avatarRequest = ImageCache.avatars.get(status.account.avatar) { [weak self] (data) in
guard let self = self, let data = data else { return }
DispatchQueue.main.async {
self.avatarImageView.image = UIImage(data: data)
}

2
Tusker/Views/ContentTextView.swift
View File

@ -49,7 +49,7 @@ class ContentTextView: LinkTextView {
for emoji in emojis {
group.enter()
ImageCache.emojis.get(emoji.url) { (data) in
_ = ImageCache.emojis.get(emoji.url) { (data) in
defer { group.leave() }
guard let data = data, let image = UIImage(data: data) else {
return

14
Tusker/Views/Instance Cell/InstanceTableViewCell.swift
View File

@ -20,6 +20,7 @@ class InstanceTableViewCell: UITableViewCell {
var selectorInstance: InstanceSelector.Instance?
var thumbnailURL: URL?
var thumbnailRequest: ImageCache.Request?
override func awakeFromNib() {
super.awakeFromNib()
@ -59,12 +60,21 @@ class InstanceTableViewCell: UITableViewCell {
private func updateThumbnail(url: URL) {
thumbnailImageView.image = nil
thumbnailURL = url
ImageCache.attachments.get(url) { (data) in
guard self.thumbnailURL == url, let data = data, let image = UIImage(data: data) else { return }
thumbnailRequest = ImageCache.attachments.get(url) { [weak self] (data) in
guard let self = self, self.thumbnailURL == url, let data = data, let image = UIImage(data: data) else { return }
self.thumbnailRequest = nil
DispatchQueue.main.async {
self.thumbnailImageView.image = image
}
}
}
override func prepareForReuse() {
super.prepareForReuse()
thumbnailRequest?.cancel()
instance = nil
selectorInstance = nil
}
}

12
Tusker/Views/Notifications/ActionNotificationGroupTableViewCell.swift
View File

@ -24,7 +24,7 @@ class ActionNotificationGroupTableViewCell: UITableViewCell {
var group: NotificationGroup!
var statusID: String!
var authorAvatarURL: URL?
var avatarRequests = [String: ImageCache.Request]()
var updateTimestampWorkItem: DispatchWorkItem?
deinit {
@ -75,9 +75,10 @@ class ActionNotificationGroupTableViewCell: UITableViewCell {
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.layer.masksToBounds = true
imageView.layer.cornerRadius = Preferences.shared.avatarStyle.cornerRadiusFraction * 30
ImageCache.avatars.get(account.avatar) { (data) in
guard let data = data, self.group.id == group.id else { return }
avatarRequests[account.id] = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, let data = data, self.group.id == group.id else { return }
DispatchQueue.main.async {
self.avatarRequests.removeValue(forKey: account.id)
imageView.image = UIImage(data: data)
}
}
@ -149,10 +150,7 @@ class ActionNotificationGroupTableViewCell: UITableViewCell {
override func prepareForReuse() {
super.prepareForReuse()
if let authorAvatarURL = authorAvatarURL {
ImageCache.avatars.cancel(authorAvatarURL)
}
avatarRequests.values.forEach { $0.cancel() }
updateTimestampWorkItem?.cancel()
updateTimestampWorkItem = nil
}

7
Tusker/Views/Notifications/FollowNotificationGroupTableViewCell.swift
View File

@ -20,6 +20,7 @@ class FollowNotificationGroupTableViewCell: UITableViewCell {
var group: NotificationGroup!
var avatarRequests = [String: ImageCache.Request]()
var updateTimestampWorkItem: DispatchWorkItem?
deinit {
@ -55,9 +56,10 @@ class FollowNotificationGroupTableViewCell: UITableViewCell {
imageView.translatesAutoresizingMaskIntoConstraints = false
imageView.layer.masksToBounds = true
imageView.layer.cornerRadius = Preferences.shared.avatarStyle.cornerRadiusFraction * 30
ImageCache.avatars.get(account.avatar) { (data) in
guard let data = data, self.group.id == group.id else { return }
avatarRequests[account.id] = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, let data = data, self.group.id == group.id else { return }
DispatchQueue.main.async {
self.avatarRequests.removeValue(forKey: account.id)
imageView.image = UIImage(data: data)
}
}
@ -114,6 +116,7 @@ class FollowNotificationGroupTableViewCell: UITableViewCell {
override func prepareForReuse() {
super.prepareForReuse()
avatarRequests.values.forEach { $0.cancel() }
updateTimestampWorkItem?.cancel()
updateTimestampWorkItem = nil
}

7
Tusker/Views/Notifications/FollowRequestNotificationTableViewCell.swift
View File

@ -25,6 +25,7 @@ class FollowRequestNotificationTableViewCell: UITableViewCell {
var notification: Pachyderm.Notification?
var account: Account!
var avatarRequest: ImageCache.Request?
var updateTimestampWorkItem: DispatchWorkItem?
deinit {
@ -53,8 +54,9 @@ class FollowRequestNotificationTableViewCell: UITableViewCell {
func updateUI(account: Account) {
self.account = account
actionLabel.text = "Request to follow from \(account.realDisplayName)"
ImageCache.avatars.get(account.avatar) { (data) in
guard self.account == account, let data = data, let image = UIImage(data: data) else { return }
avatarRequest = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, self.account == account, let data = data, let image = UIImage(data: data) else { return }
self.avatarRequest = nil
DispatchQueue.main.async {
self.avatarImageView.image = image
}
@ -88,6 +90,7 @@ class FollowRequestNotificationTableViewCell: UITableViewCell {
override func prepareForReuse() {
super.prepareForReuse()
avatarRequest?.cancel()
updateTimestampWorkItem?.cancel()
updateTimestampWorkItem = nil
}

26
Tusker/Views/Profile Header/ProfileHeaderTableViewCell.swift
View File

@ -32,8 +32,8 @@ class ProfileHeaderTableViewCell: UITableViewCell {
var accountID: String!
var avatarURL: URL?
var headerURL: URL?
var avatarRequest: ImageCache.Request?
var headerRequest: ImageCache.Request?
override func awakeFromNib() {
avatarContainerView.layer.masksToBounds = true
@ -63,19 +63,19 @@ class ProfileHeaderTableViewCell: UITableViewCell {
usernameLabel.text = "@\(account.acct)"
avatarImageView.image = nil
avatarURL = account.avatar
ImageCache.avatars.get(account.avatar) { (data) in
guard let data = data else { return }
avatarRequest = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, let data = data, self.accountID == accountID else { return }
self.avatarRequest = nil
DispatchQueue.main.async {
self.avatarImageView.image = UIImage(data: data)
self.avatarURL = nil
}
}
ImageCache.headers.get(account.header) { (data) in
guard let data = data else { return }
headerImageView.image = nil
headerRequest = ImageCache.headers.get(account.header) { [weak self] (data) in
guard let self = self, let data = data, self.accountID == accountID else { return }
self.headerRequest = nil
DispatchQueue.main.async {
self.headerImageView.image = UIImage(data: data)
self.headerURL = nil
}
}
@ -131,12 +131,8 @@ class ProfileHeaderTableViewCell: UITableViewCell {
}
override func prepareForReuse() {
if let url = avatarURL {
ImageCache.avatars.cancel(url)
}
if let url = headerURL {
ImageCache.headers.cancel(url)
}
avatarRequest?.cancel()
headerRequest?.cancel()
}
@objc func morePressed() {

13
Tusker/Views/Status/BaseStatusTableViewCell.swift
View File

@ -64,8 +64,7 @@ class BaseStatusTableViewCell: UITableViewCell {
}
var showStatusAutomatically = false
var avatarURL: URL?
var attachmentDataTasks: [URLSessionDataTask] = []
private var avatarRequest: ImageCache.Request?
private var statusUpdater: Cancellable?
private var accountUpdater: Cancellable?
@ -180,12 +179,10 @@ class BaseStatusTableViewCell: UITableViewCell {
func updateUI(account: Account) {
usernameLabel.text = "@\(account.acct)"
avatarImageView.image = nil
avatarURL = account.avatar
ImageCache.avatars.get(account.avatar) { (data) in
guard let data = data, self.avatarURL == account.avatar else { return }
avatarRequest = ImageCache.avatars.get(account.avatar) { [weak self] (data) in
guard let self = self, let data = data, self.accountID == account.id else { return }
DispatchQueue.main.async {
self.avatarImageView.image = UIImage(data: data)
self.avatarURL = nil
}
}
}
@ -200,9 +197,7 @@ class BaseStatusTableViewCell: UITableViewCell {
override func prepareForReuse() {
super.prepareForReuse()
if let avatarURL = avatarURL {
ImageCache.avatars.cancel(avatarURL)
}
avatarRequest?.cancel()
attachmentsView.attachmentViews.allObjects.forEach { $0.removeFromSuperview() }
showStatusAutomatically = false
}

2
Tusker/Views/Status/TimelineStatusTableViewCell.swift
View File

@ -95,7 +95,7 @@ class TimelineStatusTableViewCell: BaseStatusTableViewCell {
}
func updateTimestamp() {
guard let status = mastodonController.cache.status(for: statusID) else { fatalError("Missing cached status \(statusID!)") }
guard let mastodonController = mastodonController, let status = mastodonController.cache.status(for: statusID) else { fatalError("Missing cached status \(statusID!)") }
timestampLabel.text = status.createdAt.timeAgoString()
timestampLabel.accessibilityLabel = TimelineStatusTableViewCell.relativeDateFormatter.localizedString(for: status.createdAt, relativeTo: Date())