Dev Tools · 2h ago
How to Cancel DispatchWorkItem in GCD: Cooperative Cancellation Explained
DispatchWorkItem cancellation in GCD is cooperative, not preemptive. Calling cancel() before dispatch prevents execution entirely. If called during execution, the block must check isCancelled to stop itself.
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A clear, practical guide for iOS developers, but the cooperative cancellation pattern is well-known; the article's value is in the concise code examples.
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