我遵循 ionic 文档(这里)和 Github 文档(这里)上的指示。到目前为止,我可以检索所有库项目信息。但是我从未成功在img标签中显示照片。
以下是我的 home.ts:
这是home.html文件:
我总是得到一个空的img框,其
我的ionic信息是: cli packages:(
以下是我的 home.ts:
import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
import { PhotoLibrary } from '@ionic-native/photo-library';
import { Platform } from 'ionic-angular';
import { ChangeDetectorRef } from '@angular/core';
import { DomSanitizer, SafeUrl } from '@angular/platform-browser';
@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
library:any;
constructor(public navCtrl: NavController, private photoLibrary: PhotoLibrary, private platform: Platform,
private cd: ChangeDetectorRef, private sanitizer: DomSanitizer) {
this.library = [];
this.fetchPhotos();
}
fetchPhotos() {
this.platform.ready().then(() => {
this.library = [];
this.photoLibrary.requestAuthorization().then(() => {
this.photoLibrary.getLibrary({
thumbnailWidth: 512,
thumbnailHeight: 384,
itemsInChunk: 100,
chunkTimeSec: 0.5,
useOriginalFileNames: false
}).subscribe({
next: (chunk) => {
this.library = this.library.concat(chunk);
//this.library = this.library.slice(0, 9); // To take top 10 images
this.cd.detectChanges();
},
error: (err: string) => {
if (err.startsWith('Permission')) {
console.log('permissions weren\'t granted')
} else { // Real error
console.log('getLibrary error: ');
console.log(err);
}
},
complete: () => {
// Library completely loaded
console.log('done getting photos');
}
});
});
});
}
imgUrl(imgUrl) {
let url: SafeUrl = this.sanitizer.bypassSecurityTrustUrl(imgUrl);
return url;
}
}
这是home.html文件:
<ion-content padding>
<img *ngFor="let libraryItem of library" [src]="imgUrl(libraryItem.thumbnailURL)" />
</ion-content>
我总是得到一个空的img框,其
src=null
。
如果我不使用DomSantinizer,它将为所有照片显示警告:
(见http://g.co/ng/security#xss)WARNING: sanitizing unsafe URL value cdvphotolibrary://thumbnail?photoId=xxx&width=xx&height=xx&quality=0.5
我的ionic信息是: cli packages:(
/usr/local/lib/node_modules
)@ionic/cli-utils : 1.15.2
ionic (Ionic CLI) : 3.15.2
全局包:
cordova (Cordova CLI) : 7.1.0
本地软件包:
@ionic/app-scripts : 3.0.1
Cordova Platforms : android 6.3.0 ios 4.5.2
Ionic Framework : ionic-angular 3.8.0
系统:
ios-deploy : 1.9.2
ios-sim : 5.0.13
Node : v7.4.0
npm : 5.5.1
OS : macOS Sierra
Xcode : Xcode 8.3.2 Build version 8E2002
有人可以帮忙吗?谢谢!
<meta http-equiv="Content-Security-Policy" content="default-src 'self' data: gap: https://ssl.gstatic.com; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob: cdvphotolibrary:">
标签? - dlcardozo