Javascript 在ionic 2问题中获取Rss提要

请注意，我在尝试使用Ionic Framework 2解析rss提要时遇到了一些问题。当我运行代码时，它返回一个错误：无法读取未定义的属性“title”。你能帮我吗

项目github存储库

reddits-service.ts reddits.ts

    import { Component } from '@angular/core';
        import { NavController, NavParams } from 'ionic-angular';
        import {RedditService} from '../../providers/reddit-service';
        import {DetailsPage} from '../details/details' ;

        /*
          Generated class for the Reddits page.

          See http://ionicframework.com/docs/v2/components/#navigation for more info on
          Ionic pages and navigation.
        */
        @Component({
          selector: 'page-reddits',
          templateUrl: 'reddits.html'
        })
        export class RedditsPage {
        items:any;
        feeds:any;
        posts:any;
          constructor(public redditservice:RedditService, public navCtrl: NavController, public navParams: NavParams) {

          }
        ngOnInit(){
          this.getPost();
        }
        getPost(){
          this.redditservice.getPost().subscribe(response =>{
            console.log(response);
            this.items = response.feed.entry;
          })
        }
        viewItem(item){
          this.navCtrl.push(DetailsPage,{
            item:item
          });
        }
          ionViewDidLoad() {
            console.log('ionViewDidLoad RedditsPage');
          }

        }

reddits.html

---

您已经在此处将items数组设置为

response.feed.entity

：

this.items = response.feed.entry;

除非json具有嵌套的实体值，否则html应具有：

  <h2>{{item.title}}</h2>

{{item.title}

您是否记录了数据。。项目中的条目可能为空。数据不为空。它已被记录。我可以看到它返回的内容，但当我尝试导航到它时，它会显示用户未定义。这肯定是对象的解析问题。。人们可以告诉你，如果你张贴的日志object@suraj请查找随附的日志文件和代码，我无法在这里真正说出对象结构。。尝试

console.log（JSON.stringify（items，undefined，2））

我尝试了你的建议，结果显示为[object][object]除此之外我不确定。你可能需要调试哇…好的，你能在业余时间看看ripo吗请@Suraj我想使用这个博客url有一个解决办法，因为我只是使用reddit api应用了相同的代码，它工作了。谢谢

    Objectencoding: "UTF-8"feed: Objectauthor: Array[1]category:
 Array[6]entry:
 Array[25]generator: 
Objectid: Objectlink:
 Array[5]openSearch$itemsPerPage:
 ObjectopenSearch$startIndex: 
ObjectopenSearch$totalResults:
 Objectsubtitle: Objecttitle: 
Objectupdated: Objectxmlns: "http://www.w3.org/2005/Atom"xmlns$blogger: "http://schemas.google.com/blogger/2008"xmlns$gd: "http://schemas.google.com/g/2005"xmlns$georss: "http://www.georss.org/georss"xmlns$openSearch: "http://a9.com/-/spec/opensearchrss/1.0/"xmlns$thr: "http://purl.org/syndication/thread/1.0"__proto__: Objectversion: "1.0"__proto__: Object
    error_handler.js:47 EXCEPTION: Error in ./RedditsPage class RedditsPage - inline template:34:4 caused by: Cannot read property 'title' of undefined
    ErrorHandler.handleError @ error_handler.js:47
    IonicErrorHandler.handleError @ ionic-error-handler.js:56
    next @ application_ref.js:272
    schedulerFn @ async.js:82
    SafeSubscriber.__tryOrUnsub @ Subscriber.js:223
    SafeSubscriber.next @ Subscriber.js:172
    Subscriber._next @ Subscriber.js:125
    Subscriber.next @ Subscriber.js:89
    Subject.next @ Subject.js:55
    EventEmitter.emit @ async.js:74
    NgZone.triggerError @ ng_zone.js:278
    onHandleError @ ng_zone.js:257
    t.handleError @ polyfills.js:3
    e.runTask @ polyfills.js:3
    invoke @ polyfills.js:3

    **error_handler.js:49 ORIGINAL EXCEPTION: Cannot read property 'title' of undefined**

    ErrorHandler.handleError @ error_handler.js:49
    IonicErrorHandler.handleError @ ionic-error-handler.js:56
    next @ application_ref.js:272
    schedulerFn @ async.js:82
    SafeSubscriber.__tryOrUnsub @ Subscriber.js:223
    SafeSubscriber.next @ Subscriber.js:172
    Subscriber._next @ Subscriber.js:125
    Subscriber.next @ Subscriber.js:89
    Subject.next @ Subject.js:55
    EventEmitter.emit @ async.js:74
    NgZone.triggerError @ ng_zone.js:278
    onHandleError @ ng_zone.js:257
    t.handleError @ polyfills.js:3
    e.runTask @ polyfills.js:3
    invoke @ polyfills.js:3
    error_handler.js:52 ORIGINAL STACKTRACE:
    ErrorHandler.handleError @ error_handler.js:52
    IonicErrorHandler.handleError @ ionic-error-handler.js:56
    next @ application_ref.js:272
    schedulerFn @ async.js:82
    SafeSubscriber.__tryOrUnsub @ Subscriber.js:223
    SafeSubscriber.next @ Subscriber.js:172
    Subscriber._next @ Subscriber.js:125
    Subscriber.next @ Subscriber.js:89
    Subject.next @ Subject.js:55
    EventEmitter.emit @ async.js:74
    NgZone.triggerError @ ng_zone.js:278
    onHandleError @ ng_zone.js:257
    t.handleError @ polyfills.js:3
    e.runTask @ polyfills.js:3
    invoke @ polyfills.js:3
    error_handler.js:53 TypeError: Cannot read property 'title' of undefined
        at View_RedditsPage1.detectChangesInternal (/AppModule/RedditsPage/component.ngfactory.js:234)
        at View_RedditsPage1.AppView.detectChanges (view.js:288)
        at View_RedditsPage1.DebugAppView.detectChanges (view.js:381)
        at ViewContainer.detectChangesInNestedViews (view_container.js:45)
        at CompiledTemplate.proxyViewClass.View_RedditsPage0.detectChangesInternal (/AppModule/RedditsPage/component.ngfactory.js:120)
        at CompiledTemplate.proxyViewClass.AppView.detectChanges (view.js:288)
        at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (view.js:381)
        at CompiledTemplate.proxyViewClass.View_RedditsPage_Host0.detectChangesInternal (/AppModule/RedditsPage/host.ngfactory.js:29)
        at CompiledTemplate.proxyViewClass.AppView.detectChanges (view.js:288)
        at CompiledTemplate.proxyViewClass.DebugAppView.detectChanges (view.js:381)
    ErrorHandler.handleError @ error_handler.js:53
    IonicErrorHandler.handleError @ ionic-error-handler.js:56
    next @ application_ref.js:272
    schedulerFn @ async.js:82
    SafeSubscriber.__tryOrUnsub @ Subscriber.js:223
    SafeSubscriber.next @ Subscriber.js:172
    Subscriber._next @ Subscriber.js:125
    Subscriber.next @ Subscriber.js:89
    Subject.next @ Subject.js:55
    EventEmitter.emit @ async.js:74
    NgZone.triggerError @ ng_zone.js:278
    onHandleError @ ng_zone.js:257
    t.handleError @ polyfills.js:3
    e.runTask @ polyfills.js:3
    invoke @ polyfills.js:3
    error_handler.js:56 ERROR CONTEXT:
    ErrorHandler.handleError @ error_handler.js:56
    IonicErrorHandler.handleError @ ionic-error-handler.js:56
    next @ application_ref.js:272
    schedulerFn @ async.js:82
    SafeSubscriber.__tryOrUnsub @ Subscriber.js:223
    SafeSubscriber.next @ Subscriber.js:172
    Subscriber._next @ Subscriber.js:125
    Subscriber.next @ Subscriber.js:89
    Subject.next @ Subject.js:55
    EventEmitter.emit @ async.js:74
    NgZone.triggerError @ ng_zone.js:278
    onHandleError @ ng_zone.js:257
    t.handleError @ polyfills.js:3
    e.runTask @ polyfills.js:3
    invoke @ polyfills.js:3
    error_handler.js:57 DebugContext {_view: View_RedditsPage1, _nodeIndex: 3, _tplRow: 34, _tplCol: 4}
    ErrorHandler.handleError @ error_handler.js:57
    IonicErrorHandler.handleError @ ionic-error-handler.js:56
    next @ application_ref.js:272
    schedulerFn @ async.js:82
    SafeSubscriber.__tryOrUnsub @ Subscriber.js:223
    SafeSubscriber.next @ Subscriber.js:172
    Subscriber._next @ Subscriber.js:125
    Subscriber.next @ Subscriber.js:89
    Subject.next @ Subject.js:55
    EventEmitter.emit @ async.js:74
    NgZone.triggerError @ ng_zone.js:278
    onHandleError @ ng_zone.js:257
    t.handleError @ polyfills.js:3
    e.runTask @ polyfills.js:3
    invoke @ polyfills.js:3

this.items = response.feed.entry;

  <h2>{{item.title}}</h2>