{"id":38484,"date":"2023-01-25T14:44:59","date_gmt":"2023-12-27T09:22:19","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8react%e8%bf%9b%e8%a1%8cpdf%e6%af%94%e8%be%83%e3%80%82\/"},"modified":"2024-04-29T11:26:05","modified_gmt":"2024-04-29T03:26:05","slug":"%e7%94%a8react%e8%bf%9b%e8%a1%8cpdf%e6%af%94%e8%be%83%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8react%e8%bf%9b%e8%a1%8cpdf%e6%af%94%e8%be%83%e3%80%82\/","title":{"rendered":"\u7528React\u8fdb\u884cPDF\u6bd4\u8f83"},"content":{"rendered":"

\u7528React\u6bd4\u8f83PDF\u3002<\/p>\n

import<\/span> React<\/span>,<\/span> {<\/span> useEffect<\/span>,<\/span> useRef<\/span> }<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> WebViewer<\/span> from<\/span> \"<\/span>@pdftron\/webviewer<\/span>\"<\/span>;<\/span>\r\nimport<\/span> {<\/span> Subject<\/span> }<\/span> from<\/span> \"<\/span>rxjs<\/span>\"<\/span>;<\/span>\r\n\r\nfunction<\/span> PDFComparison<\/span>()<\/span> {<\/span>\r\n  const<\/span> viewerRef<\/span> =<\/span> useRef<\/span>(<\/span>null<\/span>);<\/span>\r\n  const<\/span> documentLoaded$<\/span> =<\/span> new<\/span> Subject<\/span>();<\/span>\r\n  let<\/span> wvInstance<\/span> =<\/span> null<\/span>;<\/span>\r\n\r\n  useEffect<\/span>(()<\/span> =><\/span> {<\/span>\r\n    const<\/span> initWebViewer<\/span> =<\/span> async <\/span>()<\/span> =><\/span> {<\/span>\r\n      const<\/span> instance<\/span> =<\/span> await<\/span> WebViewer<\/span>({<\/span>\r\n        path<\/span>:<\/span> '<\/span>..\/lib<\/span>'<\/span>,<\/span>\r\n        fullAPI<\/span>:<\/span> true<\/span>,<\/span>\r\n      },<\/span> viewerRef<\/span>.<\/span>current<\/span>);<\/span>\r\n\r\n      wvInstance<\/span> =<\/span> instance<\/span>;<\/span>\r\n\r\n      const<\/span> {<\/span> documentViewer<\/span>,<\/span> Annotations<\/span> }<\/span> =<\/span> instance<\/span>.<\/span>Core<\/span>;<\/span>\r\n\r\n      instance<\/span>.<\/span>UI<\/span>.<\/span>openElements<\/span>([<\/span>'<\/span>notesPanel<\/span>'<\/span>]);<\/span>\r\n\r\n      documentViewer<\/span>.<\/span>addEventListener<\/span>(<\/span>'<\/span>annotationsLoaded<\/span>'<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n        console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>annotations loaded<\/span>'<\/span>);<\/span>\r\n      });<\/span>\r\n\r\n      const<\/span> {<\/span> UI<\/span>,<\/span> Core<\/span> }<\/span> =<\/span> instance<\/span>;<\/span>\r\n      const<\/span> {<\/span> Color<\/span> }<\/span> =<\/span> Annotations<\/span>;<\/span>\r\n\r\n      UI<\/span>.<\/span>addEventListener<\/span>(<\/span>UI<\/span>.<\/span>Events<\/span>.<\/span>MULTI_VIEWER_READY<\/span>,<\/span> ()<\/span> =><\/span> {<\/span>\r\n        const<\/span> [<\/span>documentViewer1<\/span>,<\/span> documentViewer2<\/span>]<\/span> =<\/span> Core<\/span>.<\/span>getDocumentViewers<\/span>();<\/span>\r\n\r\n        const<\/span> startCompare<\/span> =<\/span> async <\/span>()<\/span> =><\/span> {<\/span>\r\n          const<\/span> shouldCompare<\/span> =<\/span> documentViewer1<\/span>.<\/span>getDocument<\/span>()<\/span> &&<\/span> documentViewer2<\/span>.<\/span>getDocument<\/span>();<\/span>\r\n\r\n          if <\/span>(<\/span>shouldCompare<\/span>)<\/span> {<\/span> \/\/ Check if both documents loaded before comparing<\/span>\r\n            const<\/span> beforeColor<\/span> =<\/span> new<\/span> Color<\/span>(<\/span>21<\/span>,<\/span> 205<\/span>,<\/span> 131<\/span>,<\/span> 0.4<\/span>);<\/span>\r\n            const<\/span> afterColor<\/span> =<\/span> new<\/span> Color<\/span>(<\/span>255<\/span>,<\/span> 73<\/span>,<\/span> 73<\/span>,<\/span> 0.4<\/span>);<\/span>\r\n            const<\/span> options<\/span> =<\/span> {<\/span> beforeColor<\/span>,<\/span> afterColor<\/span> };<\/span>\r\n            await<\/span> documentViewer1<\/span>.<\/span>startSemanticDiff<\/span>(<\/span>documentViewer2<\/span>,<\/span> options<\/span>);<\/span>\r\n          }<\/span>\r\n        };<\/span>\r\n\r\n        documentViewer1<\/span>.<\/span>addEventListener<\/span>(<\/span>'<\/span>documentLoaded<\/span>'<\/span>,<\/span> startCompare<\/span>);<\/span>\r\n        documentViewer2<\/span>.<\/span>addEventListener<\/span>(<\/span>'<\/span>documentLoaded<\/span>'<\/span>,<\/span> startCompare<\/span>);<\/span>\r\n        documentViewer1<\/span>.<\/span>loadDocument<\/span>(<\/span>'<\/span>http:\/\/localhost:4200\/files\/fluffy.pdf<\/span>'<\/span>);<\/span>\r\n        documentViewer2<\/span>.<\/span>loadDocument<\/span>(<\/span>'<\/span>http:\/\/localhost:4200\/files\/scooby.pdf<\/span>'<\/span>);<\/span>\r\n      });<\/span>\r\n\r\n      UI<\/span>.<\/span>enableFeatures<\/span>([<\/span>UI<\/span>.<\/span>Feature<\/span>.<\/span>MultiViewerMode<\/span>]);<\/span>\r\n    };<\/span>\r\n\r\n    initWebViewer<\/span>();<\/span>\r\n  },<\/span> []);<\/span>\r\n\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span>><\/span>\r\n      <<\/span>div<\/span> ref<\/span>=<\/span>{<\/span>viewerRef<\/span>}<\/span>><\/<\/span>div<\/span>><\/span>\r\n    <\/<\/span>div<\/span>><\/span>\r\n  );<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> default<\/span> PDFComparison<\/span>;<\/span>\r\n\r\n<\/code><\/pre>\n
PDFComparison.ts\u6bd4\u8f83PDF\u6587\u4ef6\u3002<\/p>\n
import<\/span> React<\/span> from<\/span> '<\/span>react<\/span>'<\/span>;<\/span>\r\nimport<\/span> PDFComparison<\/span> from<\/span> '<\/span>.\/PDFComparison<\/span>'<\/span>;<\/span> \/\/ PDFComparison\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u306b\u9069\u5207\u306a\u3082\u306e\u3092\u6307\u5b9a<\/span>\r\n\r\nfunction<\/span> App<\/span>()<\/span> {<\/span>\r\n  return <\/span>(<\/span>\r\n    <<\/span>div<\/span> className<\/span>=<\/span>\"App\"<\/span>><\/span>\r\n      <<\/span>PDFComparison<\/span> \/><\/span>\r\n    <\/<\/span>div<\/span>><\/span>\r\n  );<\/span>\r\n}<\/span>\r\n\r\nexport<\/span> default<\/span> App<\/span>;<\/span>\r\n<\/code><\/pre>\n
App.tsx\u7684\u7ffb\u8bd1\uff1a\u5e94\u7528.tsx<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7528React\u6bd4\u8f83PDF\u3002 import React, { useEffect, useRef } from ‘ […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38484","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u7528React\u8fdb\u884cPDF\u6bd4\u8f83 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7528react\u8fdb\u884cpdf\u6bd4\u8f83\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u7528React\u8fdb\u884cPDF\u6bd4\u8f83\" \/>\n<meta property=\"og:description\" content=\"\u7528React\u6bd4\u8f83PDF\u3002 import React, { useEffect, useRef } from ' […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7528react\u8fdb\u884cpdf\u6bd4\u8f83\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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