问题
I'm trying to use Drag&Drop features released with Angular Material 7. And dynamically creating component using ng-tempalte.
<div cdkDropList (cdkDropListDropped)="dropLocal($event)">
<ng-template #components></ng-template>
</div>
and added cdkDrag at components.
I am using createComponent at parent component to keep on create components.
viewContainerRef.createComponent
but dragdrop functionality is not functional since cdkDrag must be in a tag nested inside the one with cdkDropList, otherwise the dragged element won't detect the drop zone.
reference :https://stackoverflow.com/a/54158293/4481952
Is there a way around to make dropfunctionality work?
demo code https://stackblitz.com/edit/angular-ngtemplate-reorder?file=src%2Fapp%2Fapp.component.html
回答1:
The problem is you can't use cdkDrag and cdkDropList with componenet , we have to use service for that which is recently released with AngularMaterial 3.5.+
CdkDrag uses dependency injection to find out whether it's inside a CdkDropList which doesn't work when the template is inside a different component. For more advanced cases like this one you can use the DragDrop service to attach the drag&drop functionality yourself.
Refer https://github.com/angular/material2/issues/15553
Stackblitz code for implementation of cdkService: https://stackblitz.com/edit/angular-ngtemplate-reorder-7i6uuk?file=src%2Fapp%2Fapp.component.ts
hope this helps out someone else.
来源：https://stackoverflow.com/questions/55225625/cdkdroplist-with-ng-template-on-dynamic-component-list-dosnt-work