根據用戶生成墊卡數量

Question

我得到了簡單的 mat-cards 拖放：

<div id="pagewrapper">
  <section class="todos-section-wrapper">

    <mat-card class="card">
      <mat-card-header class="card-header">
        <mat-card-title class="card-title">Team</mat-card-title>
      </mat-card-header>
      <mat-card-content class="card-content">

        <div cdkDropList #todoList="cdkDropList" [cdkDropListData]="todos" [cdkDropListConnectedTo]="[completedList, roomOneList]"
          class="list" (cdkDropListDropped)="drop($event)">
          <div class="todo-item" *ngFor="let todo of todos" cdkDrag>{{todo}}</div>
        </div>

      </mat-card-content>
    </mat-card>

    <mat-card class="card">
      <mat-card-header class="card-header">
        <mat-card-title class="card-title">Room 1</mat-card-title>
      </mat-card-header>
      <mat-card-content class="card-content">

        <div cdkDropList #completedList="cdkDropList" [cdkDropListData]="completed"
          [cdkDropListConnectedTo]="[todoList, roomOneList]" class="list" (cdkDropListDropped)="drop($event)">
          <div class="todo-item" *ngFor="let roomTwo of completed" cdkDrag>{{roomTwo}}</div>
        </div>

      </mat-card-content>
    </mat-card>

    <mat-card class="card">
      <mat-card-header class="card-header">
        <mat-card-title class="card-title">Room 2</mat-card-title>
      </mat-card-header>
      <mat-card-content class="card-content">

        <div cdkDropList #roomOneList="cdkDropList" [cdkDropListData]="roomOne"
          [cdkDropListConnectedTo]="[completedList, todoList]"
          class="list" (cdkDropListDropped)="drop($event)">
          <div class="todo-item" *ngFor="let roomOne of roomOne" cdkDrag>{{roomOne}}</div>
        </div>

      </mat-card-content>
    </mat-card>


  </section>
</div>

還有我的 app.componen.ts

import { Component } from '@angular/core';
import {CdkDragDrop, moveItemInArray, transferArrayItem} from '@angular/cdk/drag-drop';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {

  todos: string[] = [
    'Jan Nowak',
    'Jan Kowalski',
    'Monika Nowak',
    'Radek Testowy',
    'Marek Tester',
    'Marian Kowalski'
  ];

  completed: string[] = [
    'Marek Pospieszalski'
  ];

  roomOne: string[] = [
    'Mariusz Kowalski'
  ];


  drop(event: CdkDragDrop<string[]>) {

    if (event.previousContainer === event.container) {

      moveItemInArray(
        event.container.data,
        event.previousIndex,
        event.currentIndex
      );

    } else {

      transferArrayItem(
        event.previousContainer.data,
        event.container.data,
        event.previousIndex,
        event.currentIndex
      );

    }

    console.log('todos: '+this.todos);
    console.log('completed: '+this.completed);
    console.log('roomOne: ' + this.roomOne);
    
  }
  
 
}

實際上我有 2 個墊子卡：房間 1 和房間 2 我的目標是實現我有簡單的用戶輸入器，我可以在其中詢問您想要多少個房間，然后用戶輸入例如 4 個房間，他得到了 4 個墊子卡然后他可以把人放在房間里。

如何動態生成墊卡？

Answer 1

您必須使用 *ngFor 動態渲染 n 張卡片。 看看這個例子： https://stackblitz.com/edit/angular-ivy-iqvkks?file=src%2Fapp%2Fapp.component.ts