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Quick Look Thumbnailing / QLThumbnailReply / init(contextSize:drawingBlock:)

init(contextSize:drawingBlock:)

Declaration

convenience init(contextSize: CGSize, drawingBlock: @escaping (CGContext) -> Bool)

Open on developer.apple.com

Quick Look ThumbnailingInitializer

iOS 11.0+iPadOS 11.0+Mac Catalyst 13.1+macOS 10.15+visionOS 1.0+

Built on 2026-06-12 · Snapshot snapshot-20260612-beta.1 (macOS 27.0) · Commit fba13e1 · by @g-cqd · based on Apple Developer Documentation