网站被封怎么,商业网站网址,长春微信网站建设,怎样做一个微信公众号HarmonyOS 鸿蒙Next 预览pdf文件 1、使用filePreview 2、使用web组件 在线pdf#xff08;网址是直接下载的#xff0c;不是直接可以预览的#xff09;#xff0c;先下载再预览
import media from ohos.multimedia.media;import web_webview from ohos.web.webview;import …HarmonyOS 鸿蒙Next 预览pdf文件 1、使用filePreview 2、使用web组件 在线pdf网址是直接下载的不是直接可以预览的先下载再预览
import media from ohos.multimedia.media;import web_webview from ohos.web.webview;import { request } from kit.BasicServicesKit;import common from ohos.app.ability.common;import fs from ohos.file.fs;EntryComponentstruct WebViewPageDemo {webviewController: web_webview.WebviewController new web_webview.WebviewController();State fileUrl: string State title: string pathhasFile(filePath:string){let b fs.accessSync(filePath)return b}aboutToAppear() {const context getContext(this) as common.UIAbilityContextthis.pathcontext.filesDir/1700182405099.pdfconsole.log(demo , this.path)console.log(this.hasFile(this.path)123456)if(!this.hasFile(this.path)) {request.downloadFile(context, {url: https://prdc-ams.oss-cn-shenzhen.aliyuncs.com/1700182405099.pdf,filePath: this.path}).then((data: request.DownloadTask) {data.on(complete, () {console.log(demo complete, this.path)this.fileUrl this.path})data.on(fail, (err) {console.log(demo fail, this.path)this.fileUrl this.path})})}}build(){Column(){Button(loadUrl).onClick((){this.webviewController.loadUrl(file://this.path)})Web({src: , controller: this.webviewController}).javaScriptAccess(true).domStorageAccess(true).verticalScrollBarAccess(true).fileAccess(true).height(100%).width(100%).onControllerAttached(() {this.webviewController.loadUrl(file://this.path)})}.height(100%).width(100%)}}3、使用PdfView PdfView使用的坑
如果是在线pdf可下载到本地沙箱然后获取本地地址进行预览 文件目录与路径
import { pdfService, pdfViewManager, PdfView } from kit.PDFKit
import { common } from kit.AbilityKit;
import { hilog } from kit.PerformanceAnalysisKit;Entry
Component
struct PDFView {private controller: pdfViewManager.PdfController new pdfViewManager.PdfController();aboutToAppear(): void {let context getContext() as common.UIAbilityContext;let dir: string context.filesDir//files文件下let filePath: string dir / 文件名;(async () {let loadResult1: pdfService.ParseResult await this.controller.loadDocument(filePath);if (pdfService.ParseResult.PARSE_SUCCESS loadResult1) {hilog.info(0x0000, aboutToAppear, PdfView Component has been successfully loaded!);}})()}build() {Column() {Row() {PdfView({controller: this.controller,pageFit: pdfService.PageFit.FIT_WIDTH,showScroll: true}).id(pdfview_app_view).layoutWeight(1)}.width(100%).height(100%)}}
}预览本地rawfile中的pdf
import { pdfService, pdfViewManager, PdfView } from kit.PDFKit
import { common } from kit.AbilityKit;
import { fileIo } from kit.CoreFileKit;
import { hilog } from kit.PerformanceAnalysisKit;Entry
Component
struct Index {private controller: pdfViewManager.PdfController new pdfViewManager.PdfController();aboutToAppear(): void {let context getContext() as common.UIAbilityContext;let dir: string context.filesDir// 确保在工程目录src/main/resources/rawfile里存在input.pdf文档let filePath: string dir /input.pdf;let res fileIo.accessSync(filePath);if (!res) {let content: Uint8Array context.resourceManager.getRawFileContentSync(rawfile/input.pdf);let fdSand fileIo.openSync(filePath, fileIo.OpenMode.WRITE_ONLY | fileIo.OpenMode.CREATE | fileIo.OpenMode.TRUNC);fileIo.writeSync(fdSand.fd, content.buffer);fileIo.closeSync(fdSand.fd);}(async () {// 该监听方法只能在文档加载前调用一次this.controller.registerPageCountChangedListener((pageCount: number) {hilog.info(0x0000, registerPageCountChanged-, pageCount.toString());});let loadResult1: pdfService.ParseResult await this.controller.loadDocument(filePath);// 注意这里刚加载文档请不要在这里立即设置PDF文档的预览方式})()}build() {Row() {PdfView({controller: this.controller,pageFit: pdfService.PageFit.FIT_WIDTH,showScroll: true}).id(pdfview_app_view).layoutWeight(1);}.width(100%).height(100%)}
}
