角度表多个粘性标题

Question

我们如何调整代码以便可以制作多个粘性标题，我想使第一列为名称，第二列为无粘性，然后最后一列为粘性。目前，最后一列和第一列是粘性的，但“否”列不是。我们如何解决这个问题？

https://stackblitz.com/angular/nneoarrlekb?file=src%2Fapp%2Ftable-sticky-columns-example.html,src%2Fapp%2Ftable-sticky-columns-example.ts

#ts 代码

@Component({
  selector: 'table-sticky-columns-example',
  styleUrls: ['table-sticky-columns-example.css'],
  templateUrl: 'table-sticky-columns-example.html',
})
export class TableStickyColumnsExample {
  displayedColumns =
      ['name', 'position', 'weight', 'symbol', 'position', 'weight', 'symbol', 'star'];
  dataSource = ELEMENT_DATA;
}

export interface PeriodicElement {
  name: string;
  position: number;
  weight: number;
  symbol: string;
}

const ELEMENT_DATA: PeriodicElement[] = [
  {position: 1, name: 'Hydrogen', weight: 1.0079, symbol: 'H'},
  {position: 2, name: 'Helium', weight: 4.0026, symbol: 'He'},
  {position: 3, name: 'Lithium', weight: 6.941, symbol: 'Li'},
  {position: 4, name: 'Beryllium', weight: 9.0122, symbol: 'Be'},
  {position: 5, name: 'Boron', weight: 10.811, symbol: 'B'},
  {position: 6, name: 'Carbon', weight: 12.0107, symbol: 'C'},
  {position: 7, name: 'Nitrogen', weight: 14.0067, symbol: 'N'},
  {position: 8, name: 'Oxygen', weight: 15.9994, symbol: 'O'},
  {position: 9, name: 'Fluorine', weight: 18.9984, symbol: 'F'},
  {position: 10, name: 'Neon', weight: 20.1797, symbol: 'Ne'},
];

#html 代码

<div class="example-container mat-elevation-z8">
  <table mat-table [dataSource]="dataSource">

    <!-- Name Column -->
    <ng-container matColumnDef="name" sticky>
      <th mat-header-cell *matHeaderCellDef> Name </th>
      <td mat-cell *matCellDef="let element"> {{element.name}} </td>
    </ng-container>

    <!-- Position Column -->
    <ng-container matColumnDef="position" >
      <th mat-header-cell *matHeaderCellDef> No. </th>
      <td mat-cell *matCellDef="let element"> {{element.position}} </td>
    </ng-container>

    <!-- Weight Column -->
    <ng-container matColumnDef="weight">
      <th mat-header-cell *matHeaderCellDef> Weight </th>
      <td mat-cell *matCellDef="let element"> {{element.weight}} </td>
    </ng-container>

    <!-- Symbol Column -->
    <ng-container matColumnDef="symbol">
      <th mat-header-cell *matHeaderCellDef> Symbol </th>
      <td mat-cell *matCellDef="let element"> {{element.symbol}} </td>
    </ng-container>

    <!-- Star Column -->
    <ng-container matColumnDef="star" stickyEnd>
      <th mat-header-cell *matHeaderCellDef></th>
      <td mat-cell *matCellDef="let element">
        <mat-icon>more_vert</mat-icon>
      </td>
    </ng-container>

    <tr mat-header-row *matHeaderRowDef="displayedColumns"></tr>
    <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
  </table>
</div>


<!-- Copyright 2020 Google LLC. All Rights Reserved.
    Use of this source code is governed by an MIT-style license that
    can be found in the LICENSE file at http://angular.io/license -->

Answer 1

如果没有级联（这正是您所需要的），则多个粘性会很麻烦。这是因为第一列位于

left:0

，最后一列位于

right:0

您可以将第一列的宽度固定为 200px 左右，然后您可以添加 css

.mat-column-position{
  position: sticky;
  left: 200px;
  z-index: 1;
  background-color: inherit; 
}

不幸的是，应该重新考虑制作粘性 div 时左/上位置的要求。我有这样的要求，我以编程方式计算前一列的宽度并将左侧附加到下一个元素以粘性

Answer 2

我刚刚为位置栏添加了粘性，效果很好！

<ng-container matColumnDef="position" sticky>
  <th mat-header-cell *matHeaderCellDef>No.</th>
  <td mat-cell *matCellDef="let element">{{element.position}}</td>
</ng-container>

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