29 lines
841 B
Swift
29 lines
841 B
Swift
//
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// Copyright 2021-2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only
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// Please see LICENSE in the repository root for full details.
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//
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import Foundation
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/**
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Used to avoid retain cycles by creating a proxy that holds a weak reference to the original object.
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One example of that would be using CADisplayLink, which strongly retains its target, when manually invalidating it is unfeasable.
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*/
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class WeakTarget: NSObject {
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private(set) weak var target: AnyObject?
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let selector: Selector
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static let triggerSelector = #selector(WeakTarget.handleTick(parameter:))
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init(_ target: AnyObject, selector: Selector) {
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self.target = target
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self.selector = selector
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}
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@objc private func handleTick(parameter: Any) {
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_ = self.target?.perform(self.selector, with: parameter)
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}
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}
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