在动态组件列表上带有ng-template的cdkDropList不起作用 [英] cdkDropList with ng-template on dynamic component list do'snt work

问题描述

我正在尝试使用Angular Material 7发布的拖放功能，并使用ng-tempalte动态创建组件.

<div cdkDropList (cdkDropListDropped)="dropLocal($event)"> <ng-template #components></ng-template> </div>

并在组件上添加了cdkDrag.

我在父组件处使用createComponent来继续创建组件. viewContainerRef.createComponent

，但自cdkDrag must be in a tag nested inside the one with cdkDropList, otherwise the dragged element won't detect the drop zone.

起，拖放功能不起作用

引用: https://stackoverflow.com/a/54158293/4481952

是否有办法使dropfunctionality工作?

演示代码 https://stackblitz .com/edit/angular-ngtemplate-reorder?file = src％2Fapp％2Fapp.component.html

解决方案

问题是您不能将cdkDrag和cdkDropList与componenet一起使用，我们必须使用AngularMaterial 3.5刚发布的服务. >

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.

请参阅 https://github.com/angular/material2/issues/15553

用于实现cdkService的Stackblitz代码: https://stackblitz.com/edit/angular-ngtemplate-reorder-7i6uuk?file = src％2Fapp％2Fapp.component.ts

希望这可以帮助其他人.

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

解决方案

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.

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