Question

我正在努力了解自己的所作所为。我有一个异步的项目列表（每次都有不同的数字）。我正在尝试使用div

将每个*ngFor设置为不同的

<div class="container row">
    <div id="letter">
        <div id="lines_container">
            <div *ngFor='let sentence of sentences' id="line_{{i}}" class="new-line glow">
                {{sentence.name}}
            </div>
        </div>
    </div>
</div>

details.html

@Component({
    selector: 'app-details',
    templateUrl: 'details.html',
    styleUrls: ['details.scss']
})
export class DetailsComponent implements OnInit {
  sentences: string[];

  constructor(private data: DetailsService, private ravenDataService: RavenDataService) { }

  ngOnInit(): void {
    this.data.sentences.subscribe(sentences => {
      console.log(sentences);
      this.sentences = sentences;
    });
  }
}

DetailsComponent.ts

<div *ngFor='let sentence of sentences | async' id="line_{{i}}" class="new-line glow">

我可以在几秒钟后看到用我的句子打印的日志，但它不会更新我的HTML页面。我也尝试使用异步管道但没有成功

 <i class="fa fa-info-circle" id="disclaimerTooltip" tabindex="0" aria-describedby="myfield_description"></i> 

<span class="test myfield_description" role="tooltip">
Lorem ipsum dolor sit amet, consectetur adipiscing elit. 
 </span>

Answer 1

我认为这只是一个错字，请尝试使用异步管道，不要使用订阅。

@Component({
    selector: 'app-details',
    templateUrl: 'details.html',
    styleUrls: ['details.scss']
})
export class DetailsComponent implements OnInit {
  sentences$;

  constructor(private data: DetailsService, private ravenDataService: RavenDataService) { }

  ngOnInit(): void {
    this.sentences$ = this.data.sentences
  }
}

和

<div *ngFor='let sentence of sentences$ | async' id="line_{{i}}" class="new-line glow">

总是在最后用$ sign标记你的溪流，这是一个常见的约定

从异步列表更新UI html

1 个答案: