Previews or thumbnail images for macOS 10.14 or earlier

Overview

The Quick Look framework provides functionality to create a miniature representation, or thumbnail, of a file and its contents for display in apps that target macOS 10.14 and earlier.

If your app targets macOS 10.15 and later, use the Quick Look Thumbnailing framework to create thumbnails. Similarly, use a Quick Look preview extension to display previews of files instead of Quick Look generators. To learn more, watch What’s New in File Management and Quick Look.

Topics

Creating thumbnails

• QLThumbnailImageCreate(_:_:_:_:)
• QLThumbnailCreate(_:_:_:_:)
• QLThumbnailDispatchAsync(_:_:_:)
• QLThumbnailCancel(_:)
• QLThumbnailCopyDocumentURL(_:)
• QLThumbnailCopyImage(_:)
• QLThumbnailCopyOptions(_:)
• QLThumbnailGetContentRect(_:)
• QLThumbnailGetMaximumSize(_:)
• QLThumbnailGetTypeID()
• QLThumbnailIsCancelled(_:)

Handling thumbnail requests

• QLThumbnailRequestCopyContentUTI(_:)
• QLThumbnailRequestCopyOptions(_:)
• QLThumbnailRequestCopyURL(_:)
• QLThumbnailRequestCreateContext(_:_:_:_:)
• QLThumbnailRequestFlushContext(_:_:)
• QLThumbnailRequestGetDocumentObject(_:)
• QLThumbnailRequestGetGeneratorBundle(_:)
• QLThumbnailRequestGetMaximumSize(_:)
• QLThumbnailRequestGetTypeID()
• QLThumbnailRequestIsCancelled(_:)
• QLThumbnailRequestSetDocumentObject(_:_:_:)
• QLThumbnailRequestSetImage(_:_:_:)
• QLThumbnailRequestSetImageAtURL(_:_:_:)
• QLThumbnailRequestSetImageWithData(_:_:_:)
• QLThumbnailRequestSetThumbnailWithDataRepresentation(_:_:_:_:_:)
• QLThumbnailRequestSetThumbnailWithURLRepresentation(_:_:_:_:_:)

Requesting previews

• QLPreviewRequestCopyContentUTI(_:)
• QLPreviewRequestCopyOptions(_:)
• QLPreviewRequestCopyURL(_:)
• QLPreviewRequestCreateContext(_:_:_:_:)
• QLPreviewRequestCreatePDFContext(_:_:_:_:)
• QLPreviewRequestFlushContext(_:_:)
• QLPreviewRequestGetDocumentObject(_:)
• QLPreviewRequestSetDocumentObject(_:_:_:)
• QLPreviewRequestGetGeneratorBundle(_:)
• QLPreviewRequestGetTypeID()
• QLPreviewRequestIsCancelled(_:)
• QLPreviewRequestSetDataRepresentation(_:_:_:_:)
• QLPreviewRequestSetURLRepresentation(_:_:_:_:)

Configuring the appearance of PDF previews

• QLPreviewPDFStyle

Interfacing with a Quick Look plug-in

• QLGeneratorInterfaceStruct

Opaque types

• QLThumbnail
• QLThumbnailRequest
• QLPreviewRequest

Constants

• kQLReturnMask
• kQLReturnHasMore
• kQLThumbnailOptionIconModeKey
• kQLThumbnailOptionScaleFactorKey
• QUICKLOOK_VERSION

Deprecated constants

• kQLPreviewContentIDScheme
• kQLPreviewPropertyCursorKey
• kQLPreviewOptionCursorKey
• kQLPreviewPropertyAttachmentDataKey
• kQLPreviewPropertyAttachmentsKey
• kQLPreviewPropertyBaseBundlePathKey
• kQLPreviewPropertyDisplayNameKey
• kQLPreviewPropertyHeightKey
• kQLPreviewPropertyMIMETypeKey
• kQLPreviewPropertyPDFStyleKey
• kQLPreviewPropertyStringEncodingKey
• kQLPreviewPropertyTextEncodingNameKey
• kQLPreviewPropertyWidthKey
• kQLThumbnailPropertyBadgeImageKey
• kQLThumbnailPropertyBaseBundlePathKey
• kQLThumbnailPropertyExtensionKey

QuickLookUI symbols

• QLFilePreviewRequest
• QLPreviewProvider
• QLPreviewReply
• QLPreviewReplyAttachment
• QLPreviewItem
• QLPreviewingController

See Also

Previews

• QLPreviewController
• QLPreviewItem
• QLPreviewSceneActivationConfiguration