无法使用排序库ng2-dnd对几个不同的列表进行排序

Question

我使用了一些来自github的漂亮而简单的拖放库,我有一个带有3个不同按钮的视图,每个按钮在同一个地方点击时都会显示一个列表,但不是在同一时间.

从某种原因,只有第一个列表可以排序,但另外2个没有...我可以移动对象,但它们不可丢弃,所以我不能改变顺序.

这是我的HTML:

<div>
  <!-- list 1 button -->
  <button md-button
          (click)="showFirstList()"
          class="md-primary">List 1
  </button>

  <!-- list 2 button -->
  <button md-button
          (click)="showSecondList()"
          class="md-primary">List 2

  </button>

  <!-- list 3 button -->
  <button md-button
          (click)="ThirdList()"
          class="md-primary">List 3

  </button>
</div>


        <md-content>

          <div *ngIf="showingListOne">
            <div dnd-sortable-container [dropZones]="['zone-one']" [sortableData]="listOneToDisplay | async">
              <div class="list-bg" *ngFor="#item of listOneToDisplay | async; #i = index" dnd-sortable [sortableIndex]="i">
                ID: {{item.id}} <p></p> name: {{item.name}}
              </div>
            </div><br><br>
          </div>


          <div *ngIf="showingListTwo">
            <div dnd-sortable-container [dropZones]="['zone-two']" [sortableData]="listTwoToDisplay | async">
              <div class="list-bg" *ngFor="#item of listTwoToDisplay | async; #i = index" dnd-sortable [sortableIndex]="i">
                ID: {{item.id}} <p></p> age: {{item.age}}
              </div>
            </div>
          </div>


          <div *ngIf="showingListThree">
            <div dnd-sortable-container [dropZones]="['zone-three']"  [sortableData]="listThreeToDisplay | async">
              <div class="list-bg" *ngFor="#item of listThreeToDisplay | async; #i = index" dnd-sortable [sortableIndex]="i">
                ID: {{item.id}} <p></p> age: {{item.age}}
              </div>
            </div>
    </div>
          </div>

        </md-content>

这是我的sorting-lists.component.ts:

@Component({
  selector: 'sorting-lists',
  styles: [require('./sorting-lists.css')],
  directives: [DND_DIRECTIVES],
  providers: [DND_PROVIDERS],
  template: require('./sorting-lists.component.html')
})

@Injectable()
export class MyCmp implements OnInit {

  listOneToDisplay  = this._myService.getFirstListData();
  listTwoToDisplay = this._myService.getSecondListData();
  listThreeToDisplay = this._myService.getThirdListData();

  showingListOne = false;
  showingListTwo = false;
  showingListThree = false;

  constructor(private _myService: MyService) {
  };


  public showFirstList(): void {
    this.showingListOne = true;
    this.showingListTwo = false;
    this.showingListThree = false;
  }

  public showSecondList(): void {
    this.showingListTwo = true;
    this.showingListOne = false;
    this.showingListThree = false;
  }

  public showThirdList(): void {
    this.showingListThree = true;
    this.showingListTwo = false;
    this.showingListOne = false;
  }

}

如果有人可以帮我弄清楚为什么只有第一个可以排序它会被祝福!

谢谢 :)

Answer 1

EDIT2：（根据您的问题的新版本）：

尝试在应用程序的引导程序中提供 DND_PROVIDERS，而不是在组件中提供它。欲了解更多详细信息，请查看此处。

bootstrap(AppComponent, [
    DND_PROVIDERS // It is required to have 1 unique instance of your service
]);

您还可以使用ng2-dragula ，它是Dragula的官方 Angular2 包装器。

通过 npm 安装

编辑：要将 ng2-dragular 与Angular 2.0.0-beta.15一起使用，请添加 ng2-dragula 包，其中包含 github 链接以及在切换到 RC.1 之前的最后一次提交package.json：

ng2-dragula": "git://github.com/valor-software/ng2-dragula.git#0cdcd52b1a486609ed4b4a43465b1dac2bb1b007

> npm install

用法

将 DragulaService 添加到您的组件中，并将 Dragula 添加到您的组件指令中。

@Component({
  selector: 'sample',
  directives: [Dragula],
  viewProviders: [DragulaService],
  template:`
  <div>
    <div class='wrapper'>
      <div class='container' [dragula]='"first-bag"'>
        <div>You can move these elements between these two containers</div>
        <div>Moving them anywhere else isn't quite possible</div>
        <div>There's also the possibility of moving elements around in the same container, changing their position</div>
      </div>
      <div class='container' [dragula]='"first-bag"'>
        <div>This is the default use case. You only need to specify the containers you want to use</div>
        <div>More interactive use cases lie ahead</div>
        <div>Make sure to check out the <a href='https://github.com/bevacqua/dragula#readme'>documentation on GitHub!</a></div>
      </div>
    </div>
  </div>
  `
})
class Sample {}