9439cc5191
- Move recipient picker code to the correct file. - Add a helper to fetch typed reusable table view cells. - Only set shouldUseAsyncSelection in the one place that uses it. - Remove some code that was duplicated between sync/async selection. - Fix some strong references in the async preparation flow. - Allow network errors when preparing recipients -- these may do network fetches, and those can fail for non-interesting reasons. - Move FindByPhoneNumberDelegate to Swift & make some code private.
47 lines
1.7 KiB
Swift
47 lines
1.7 KiB
Swift
//
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// Copyright 2022 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import UIKit
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public protocol ReusableTableViewCell {
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static var reuseIdentifier: String { get }
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}
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public extension UITableView {
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/// A typed wrapper around `dequeueReusableCell`.
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///
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/// - Parameters:
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/// - type: The `UITableViewCell` subclass that should be dequeued.
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/// - indexPath: An optional index path for where the cell will be shown.
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/// - isRegistered:
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/// If true, indicates that the class was registered using
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/// `-[UITableView registerClass:forCellReuseIdentifier:]`; in this
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/// case, the table view will create a new instance if one isn't
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/// available to dequeue. If false, indicates that the class wasn't
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/// registered; in this case, the table view will return `nil` if a
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/// cell isn't available to dequeue.
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/// - Returns:
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/// A typed `UITableViewCell` subclass. If `isRegistered` is true (and
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/// the class is properly registered), this won't return `nil`.
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func dequeueReusableCell<T: ReusableTableViewCell & UITableViewCell>(
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_ type: T.Type,
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for indexPath: IndexPath? = nil,
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isRegistered: Bool = true
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) -> T? {
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let untypedCell: UITableViewCell?
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if let indexPath {
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untypedCell = dequeueReusableCell(withIdentifier: type.reuseIdentifier, for: indexPath)
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} else {
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untypedCell = dequeueReusableCell(withIdentifier: type.reuseIdentifier)
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}
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guard let typedCell = untypedCell as? T else {
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owsAssertDebug(!isRegistered, "Registered cells should exist and have the correct type.")
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return nil
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}
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return typedCell
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}
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}
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