在Angular 7中，可以使用ComponentFactoryResolver来动态加载@Component。下面是一个示例：

首先，创建一个动态加载组件的服务：

import { Injectable, ComponentFactoryResolver, ViewContainerRef } from '@angular/core';

@Injectable()
export class DynamicComponentService {
  constructor(private componentFactoryResolver: ComponentFactoryResolver) {}

  loadComponent(component: any, container: ViewContainerRef) {
    const componentFactory = this.componentFactoryResolver.resolveComponentFactory(component);
    container.clear();
    container.createComponent(componentFactory);
  }
}

然后，在需要动态加载组件的组件中，注入DynamicComponentService并使用它来加载组件：

import { Component, ViewChild, ViewContainerRef } from '@angular/core';
import { DynamicComponentService } from './dynamic-component.service';
import { MyDynamicComponent } from './my-dynamic.component';

@Component({
  selector: 'app-my-component',
  template: `
    

    Load Component
  `
})
export class MyComponent {
  @ViewChild('container', { read: ViewContainerRef }) container: ViewContainerRef;

  constructor(private dynamicComponentService: DynamicComponentService) {}

  loadComponent() {
    this.dynamicComponentService.loadComponent(MyDynamicComponent, this.container);
  }
}

最后，创建一个需要动态加载的组件：

import { Component } from '@angular/core';

@Component({
  selector: 'app-my-dynamic-component',
  template: `
    
Dynamic Component
    
This component is dynamically loaded.
  `
})
export class MyDynamicComponent {}

通过点击"Load Component"按钮，就可以动态加载MyDynamicComponent组件到MyComponent组件中的

希望这个示例能够帮助你解决问题！