请参阅此答案以了解其无法正常工作的原因,这里还有一个示例ng-template
如何使用s 和数据模型正确实现拖放:
import { Component, Input, ViewChild, TemplateRef } from '@angular/core';
import { CdkDragDrop, moveItemInArray, transferArrayItem } from '@angular/cdk/drag-drop';
@Component({
selector: 'hello',
template: `
<div class="row" cdkDropListGroup>
<div class="col-6" cdkDropList [cdkDropListData]="list1"
(cdkDropListDropped)="panelDropped($event)">
<div cdkDrag *ngFor="let p of list1">
<ng-container *ngTemplateOutlet="this[p+'Panel']">
</ng-container>
</div>
</div>
<div class="col-6" cdkDropList [cdkDropListData]="list2"
(cdkDropListDropped)="panelDropped($event)">
<div cdkDrag *ngFor="let p of list2">
<ng-container *ngTemplateOutlet="this[p+'Panel']">
</ng-container>
</div>
</div>
</div>
<ng-template #aPanel><div class="card"></div></ng-template>
<ng-template #bPanel><div class="card"></div></ng-template>
<ng-template #cPanel><div class="card"></div></ng-template>
<ng-template #dPanel><div class="card"></div></ng-template>
<ng-template #ePanel><div class="card"></div></ng-template>
<ng-template #fPanel><div class="card"></div></ng-template>
`,
styles: [`
.col-6:nth-child(1) { background-color: plum; }
.col-6:nth-child(2) { background-color: peru; }
.card { background-color: blue; height: 10em; margin: 0.5em; }
`]
})
export class HelloComponent {
@Input() name: string;
@ViewChild('aPanel') aPanel: TemplateRef<any>;
@ViewChild('bPanel') bPanel: TemplateRef<any>;
@ViewChild('cPanel') cPanel: TemplateRef<any>;
@ViewChild('dPanel') dPanel: TemplateRef<any>;
@ViewChild('ePanel') ePanel: TemplateRef<any>;
@ViewChild('fPanel') fPanel: TemplateRef<any>;
list1: Array<string> = ['a', 'b', 'c'];
list2: Array<string> = ['d', 'e', 'f'];
panelDropped(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);
}
}
}