快速添加/删除组件 [英] Adding / Removing components on the fly

问题描述

我需要能够添加&快速移除Angular组件.为此，我正在使用loadIntoLocation并处理类似的方法:

I need to be able to add & remove Angular components on the fly. To do so, I'm using loadIntoLocation and dispose methods, like it:

添加组件(通过布局管理器):

Adding a component (from a layout manager):

this.m_loader.loadIntoLocation(MyComponent, this.m_element, 'content').then(_componentRef => {

    // Create the window and set its title:
    var component: MyComponent = (_componentRef.instance);
    component.ref = _componentRef;

    // init the component content
});

(从组件中)删除组件:

Removing a component (from the component):

this.ref.dispose();

它几乎可以正常工作: -如果我添加一个组件并将其关闭，则可以正常工作 -如果我添加几个组件，它们会起作用 -但是，如果我添加组件A，然后将其删除，然后添加组件B，则Angular似乎为我提供了对A的引用，并保留了一些旧值(我的组件是可拖动的，在这种情况下B将被创建，A是当我销毁它时)

It is nearly working: - if I add a component, and close it, it works - if I add several components, they work - but if I add component A, then remove it, then add component B, it seems like Angular gives me a reference to A, and keeps some old values (my components are draggable, and in this case the B will be created A was when I destroyed it)

有没有办法使Angular正确销毁组件，或者至少迫使它创建新组件?

Is there a way to make Angular destroy components properly, or at least to force it to create fresh ones?

推荐答案

如Tim所建议，

引用@tbosch的评论

quoting @tbosch's comment

默认情况下，Angular重用先前创建的DOM元素

Angular reuses previously created DOM elements by default

因此，为了避免这种行为，也可以从注释中删除，您可以使用APP_VIEW_POOL_CAPACITY并将其分配为0作为值.

So to avoid this behavior, taken from the comment as well, you can use APP_VIEW_POOL_CAPACITY and assign it 0 as value.

bootstrap(MyApp, [provide(APP_VIEW_POOL_CAPACITY, {useValue: 0})])

更新

请注意，由于#5993 已删除beta.1 APP_VIEW_POOL_CAPACITY，因此DOM已正确创建.

Update

Note that since beta.1 APP_VIEW_POOL_CAPACITY was removed by #5993 and the DOM is being recreated correctly.

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