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Generate PDF Search Previews on iOS

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PDFLibrary can also generate a small snippet of text around each match it finds. When calling documentUIDs(matching:options:completionHandler:previewTextHandler:), if the previewTextHandler parameter is not nil, PDFLibrary will also generate previews. Note that preview generation will have a performance impact, as additional information needs to be extracted from the database. PDFDocumentPickerController leverages preview generation when displaying results, as shown below.

Preview example