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fix: user timeline duplicate snapshot update issue

This commit is contained in:
CMK 2021-06-24 10:27:41 +08:00
parent ab19323bcd
commit 0366c83666
1 changed files with 8 additions and 8 deletions
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16
Mastodon/Scene/Profile/Timeline/UserTimelineViewModel.swift
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@ -62,10 +62,10 @@ final class UserTimelineViewModel {
.store(in: &disposeBag)
Publishers.CombineLatest4(
statusFetchedResultsController.objectIDs.eraseToAnyPublisher(),
isBlocking.eraseToAnyPublisher(),
isBlockedBy.eraseToAnyPublisher(),
isSuspended.eraseToAnyPublisher()
statusFetchedResultsController.objectIDs.removeDuplicates(),
isBlocking,
isBlockedBy,
isSuspended
)
.receive(on: DispatchQueue.main)
.debounce(for: .milliseconds(300), scheduler: DispatchQueue.main)
@ -76,12 +76,12 @@ final class UserTimelineViewModel {
var items: [Item] = []
var snapshot = NSDiffableDataSourceSnapshot<StatusSection, Item>()
snapshot.appendSections([.main])
defer {
// not animate when empty items fix loader first appear layout issue
diffableDataSource.apply(snapshot, animatingDifferences: !items.isEmpty)
}
guard !isBlocking else {
snapshot.appendItems([Item.emptyStateHeader(attribute: Item.EmptyStateHeaderAttribute(reason: .blocking))], toSection: .main)
return
@ -97,14 +97,14 @@ final class UserTimelineViewModel {
snapshot.appendItems([Item.emptyStateHeader(attribute: Item.EmptyStateHeaderAttribute(reason: .suspended(name: name)))], toSection: .main)
return
}
var oldSnapshotAttributeDict: [NSManagedObjectID : Item.StatusAttribute] = [:]
let oldSnapshot = diffableDataSource.snapshot()
for item in oldSnapshot.itemIdentifiers {
guard case let .status(objectID, attribute) = item else { continue }
oldSnapshotAttributeDict[objectID] = attribute
}
for objectID in objectIDs {
let attribute = oldSnapshotAttributeDict[objectID] ?? Item.StatusAttribute()
items.append(.status(objectID: objectID, attribute: attribute))