在 Angular2 中传递组件 [英] Passing Components in Angular2

问题描述

假设我想变得非常抽象和模块化，并且我想将组件作为输入传递给我的子组件.

这可能吗?

我知道我可以传递输入并在内部创建组件，但有时我想传递不同的/组件，否则我必须为每个组件自定义代码，而且我不能对操作进行抽象.

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例如，假设我有组件 P 作为父级，C 作为子级，我对 C 这样的设计有一定的目的，我希望 C 作为可重用的组件，每当我想实现这个特定的设计时里面有元素.

现在，如果我想让 C(两个单独的元素)环绕两个不同的组件，让我们称它们为 A &B. 我希望 P 能够在创建它们后将它们传递给 C 以保持设计抽象，同时能够仅将组件用作 C 中的变量.

解决方案

是的，这是可能的.实际上是 Angular2 中模块化组件的组合方式.

例如，如果您有一个模态组件并且您想在整个应用程序中使用它，但该组件只是一个包装器，需要向其中添加动态组件.

这是一个 ComponentFactoryResolver 的例子:

@Component({选择器:'我的动态组件'，模板:'这是一个动态注入的组件！'})导出类 MyDynamicComponent {}@成分({选择器:'包装器'，模板:`<div><p>包装组件</p><模板#dynamicComponent></template>

`})导出类 WrapperComponent {@Input() contentComponent: 任何;@ViewChild('dynamicComponent', { 读取:ViewContainerRef })动态组件:任何；构造函数(私有组件解析器:ComponentFactoryResolver){}ngAfterViewInit():void {const factory = this.componentResolver.resolveComponentFactory(this.contentComponent);this.dynamicComponent.createComponent(工厂);}}@成分({选择器:'我的应用'，模板:`<wrapper [contentComponent]="MyDynamicComponent"></wrapper>`})导出类 AppComponent {MyDynamicComponent: any = MyDynamicComponent;}

灵感来自 不推荐使用的 ComponentResolver 答案
可以找到另一种方法 在这里回答

示例 PLUNKER

Lets say i wanna get very abstract and modular and i want to pass components as input to my child components.

Is that possible?

I understand that i can pass the inputs and create the component internally, but sometimes i want to pass different/components otherwise i would have to customize the code to each component and i can't be abstract about the operation.

For Example, lets say i have component P as a parent and C as a child, i have a certain purpose for C such design and i would like to have C as a reusable component for whenever i want to implement this certain design with elements inside.

Now if i want to have C (two separate elements) wrap around two different components let's call them A & B. i want P to be able to pass them after creating them to C to keep the design abstract while being able to just use the components as a variable inside C.

解决方案

Yes, it is possible. Actually is how composition for modular components works in Angular2.

So for example if you have a modal component and you want to use that all over the app, but that component is just a wrapper and it is needed to add dynamic components to it.

Here it's an example with the ComponentFactoryResolver :

@Component({
  selector: 'my-dynamic-component',
  template: 'this is a dynamic injected component !'
})
export class MyDynamicComponent {}


@Component({ 
  selector: 'wrapper',
  template: `
  <div>
    <p>Wrapper Component</p>
    <template #dynamicComponent></template> 
  </div>
  `
})
export class WrapperComponent {
  @Input() contentComponent: any;
  @ViewChild('dynamicComponent', { read: ViewContainerRef })

  dynamicComponent: any;

  constructor(private componentResolver: ComponentFactoryResolver) {}

  ngAfterViewInit():void {
    const factory = this.componentResolver.resolveComponentFactory(this.contentComponent);

    this.dynamicComponent.createComponent(factory);
  }
}


@Component({
  selector: 'my-app',
  template: ` 
  <wrapper [contentComponent]="MyDynamicComponent"></wrapper>`
})
export class AppComponent {
    MyDynamicComponent: any = MyDynamicComponent;
}

Inspired from deprecated ComponentResolver answer
Another way of doing this can be found answer HERE

Example PLUNKER

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