cordova InAppBrowser有时为空/空白

1tuwyuhd  于 2022-11-15  发布在  其他
关注(0)|答案(2)|浏览(237)

我正在做一个项目,在这个项目中,我大量使用InAppBrowser来查看不同的文档(PDF,DOC,DOCX)。我在OCH X1 M1 N1 X的帮助下完成了这一点,文档存储在X1 M2 N1 X中。大多数时候它在我的Android设备上运行得很好!但有时我得到的只是一个空的白色屏幕,并且我必须按Back按钮来关闭InAppBrowser,然后重新打开它来显示文档。
在Chrome开发者工具中远程调试这个奇怪的行为时,我看到loadstartloadstop事件被正确调用:

当我在空的/白色的InAppBrowser中查看HTML时,我看到空的<body>-标签:

打开InAppBrowser的代码:

import { Injectable } from '@angular/core';
import { Platform } from 'ionic-angular';
import { InAppBrowser, InAppBrowserObject } from '@ionic-native/in-app-browser';
import { ScreenOrientation } from '@ionic-native/screen-orientation';
import { LoaderService } from './loader-service';
import * as firebase from 'firebase';

@Injectable()
export class FirebaseStorageService{
    browserOptions: string;
    browser: InAppBrowserObject;

    constructor(
        private iab: InAppBrowser,
        private loaderService:LoaderService,
        private platform: Platform,
        private screenOrientation: ScreenOrientation
    ){
        this.browserOptions = 'zoom=no,location=no,useWideViewPort=no,hidden=yes,enableViewportScale=yes';
    }

    viewPdf(path: string, loadText?:string):Promise<any>{
        this.showLoader(loadText);
        return new Promise<any>((resolve, reject) => {
            firebase.storage().ref().child(path).getDownloadURL().then(url => {
                let newURL = 'https://docs.google.com/gview?&url=' + encodeURIComponent(url);
                this.startBrowser(newURL);
                resolve();
            })
            .catch(err => {
                if(this.platform.is('cordova')){
                    this.loaderService.dismissLoader();
                }
                reject(err);
            });
        })
    }

    private startBrowser(path:string):void{
        this.browser = this.iab.create(path, '_blank', this.browserOptions);
        if(this.platform.is('cordova')){
            this.handleBrowserSubscriptions();
            this.screenOrientation.unlock();
        }
    }

    private handleBrowserSubscriptions():void{
        let stopSub = this.browser.on('loadstop').subscribe(event => {
            console.log('loadstop', event)
            this.loaderService.dismissLoader();
            this.browser.show();
            stopSub.unsubscribe();
            errorSub.unsubscribe();
        });

        let exitSub = this.browser.on('exit').subscribe(event => {
            console.log('exit:',event)
            this.loaderService.dismissLoader();
            exitSub.unsubscribe();
            this.browser.close();
            this.screenOrientation.lock(this.screenOrientation.ORIENTATIONS.PORTRAIT);
        });

        let errorSub = this.browser.on('loaderror').subscribe(event => {
            console.log('loaderror', event)
            this.loaderService.dismissLoader();
            this.browser.close();
            this.screenOrientation.lock(this.screenOrientation.ORIENTATIONS.PORTRAIT);
            stopSub.unsubscribe();
            errorSub.unsubscribe();
        });

        let startSub = this.browser.on('loadstart').subscribe(event => {
            console.log('loadstart', event);
        })
    }
}

离子信息:Cordova CLI: 7.0.1 Ionic Framework Version: 3.2.0 Ionic CLI Version: 2.2.1 Ionic App Lib Version: 2.2.0 Ionic App Scripts Version: 1.3.7 ios-deploy version: Not installed ios-sim version: Not installed OS: Windows 10 Node Version: v6.9.4 Xcode version: Not installed
有没有其他人经历过这种情况,或者有没有人知道如何解决这种情况?

eit6fx6z

eit6fx6z1#

您正在使用其中一种方式在Android的Web视图中打开文档

**解决方案-1:**您可以按如下方式修改当前Web视图:

encodeURI('https://docs.google.com/gview?embedded=true&url=http://www.your-server.com/files/your_file.pdf')

编码包括https://docs.google.com完整URL
这里是加载URL的另一种方式:
http://docs.google.com/viewer?url=http://example.com/example.pdf
如果这些解决方案中的任何一个都不起作用,则尝试下载文件并在浏览器中打开它。

t2a7ltrp

t2a7ltrp2#

第一步=〉安装流媒体插件=〉https://ionicframework.com/docs/native/streaming-media
第二步:让网址="+您的网址;
这是我的作品。

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