这是我的代码：@H_502_2@

@H_502_2@

export class Images {
  public files: any; 
  public currentPage: number = 0;
  private _rawFiles: any;

  constructor(public imagesData: ImagesData) {
    this.imagesData = imagesData;  
    this._rawFiles = this.imagesData.getData()
        .flatMap(data => Rx.Observable.fromArray(data.files));
    this.nextPage();
  }

  nextPage() {
    let imagesPerPage = 10;
    this.currentPage += 1;
    this.files = this._rawFiles
                    .skip((this.currentPage - 1) * imagesPerPage)
                    .take(imagesPerPage);
    console.log("this.files:",this.files);                
  }
}

最后的console.log显示它是一个可观察的：@H_502_2@

@H_502_2@

this.imagesData.getData()从Angular的Http服务返回一个常规的RxJS observable,那么为什么异步管道不能用呢？也许我使用flatMap()的方式是错误的,它会混淆什么？@H_502_2@

如果我尝试订阅这样的observable：@H_502_2@

@H_502_2@

this.files = this._rawFiles
                .skip((this.currentPage - 1) * imagesPerPage)
                .take(imagesPerPage)
                .subscribe(file => {
                  console.log("file:",file);
                });

它按预期打印对象列表：@H_502_2@