在Angular 2上发送组件之前更改注释 [英] Change Annotations before sending component on Angular 2

问题描述

我正在Angular 2上开发一个应用程序，在这个应用程序中，我需要动态更改@Component装饰器中的某些属性.这是我的代码:

I'm developping an app on Angular 2 and in this app I need to change dynamically some attributes inside @Component decorator. Here is my code :

function componentFactory (directives: any[], template: string) {
    let annotations = Reflect.getMetadata('annotations', ComponentBase)
    annotations[0].directives = directives
    annotations[0].template = template

    let metadata = new ComponentMetadata(annotations)
    Reflect.defineMetadata('annotations', [ metadata ], ComponentBase)

    return ComponentBase
}

问题是，当我将其与ComponentResolver一起使用时，出现此错误:组件'ComponentBase'必须设置为'template'或'templateUrl'."

The problem is that when I use it (with a ComponentResolver) I get this error : "Component 'ComponentBase' must have either 'template' or 'templateUrl' set.".

您有什么建议吗?

谢谢:)

推荐答案

我终于找到了创建动态组件的方法

I've finally found how to create dynamic components

function createDynamicComponent<T extends IBase> (componentAttributes: any, SuperClass: IConstructor<T>) {
    class DynamicComponent extends (<IConstructor<IBase>> SuperClass) {}

    return Component(componentAttributes)(DynamicComponent)
}

interface IConstructor<T> {
    new (...args): T
}

interface IBase {}

我忘了我们可以将装饰器用作函数;)

I forgot that we can use decorators as functions ;)

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