30726decd9
Splits `dequeueReusableCell(_:for:isRegistered:)` into two different methods, overloaded on the presence of the `indexPath` parameter, allowing the `indexPath` variant to return a non-optional value. Also removes the `isRegistered` parameter, which was never passed by callers and thus always defaulted to `true`.
45 lines
1.7 KiB
Swift
45 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 SignalServiceKit
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public protocol ReusableTableViewCell {
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static var reuseIdentifier: String { get }
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}
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extension UITableView {
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/// A typed wrapper around `dequeueReusableCell(withIdentifier:)`.
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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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/// - Returns:
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/// A typed `UITableViewCell` subclass, or `nil` if the type's `reuseIdentifier` is not registered.
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public func dequeueReusableCell<T: ReusableTableViewCell & UITableViewCell>(_: T.Type) -> T? {
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let untypedCell = dequeueReusableCell(withIdentifier: T.reuseIdentifier)
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guard let typedCell = untypedCell as? T else {
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owsFailDebug("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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/// A typed wrapper around `register(_:forCellReuseIdentifier:)` for cell
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/// subclasses that conform to the `ReusableTableViewCell` protocol.
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public func register<T: ReusableTableViewCell & UITableViewCell>(_: T.Type) {
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register(T.self, forCellReuseIdentifier: T.reuseIdentifier)
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}
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/// A typed wrapper around `dequeueReusableCell(withIdentifier:for:)`.
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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 index path for where the cell will be shown.
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/// - Returns:
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/// A typed `UITableViewCell` subclass.
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public func dequeueReusableCell<T: ReusableTableViewCell & UITableViewCell>(_: T.Type, for indexPath: IndexPath) -> T {
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dequeueReusableCell(withIdentifier: T.reuseIdentifier, for: indexPath) as! T
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}
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}
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