Angular2(点击)动态加载组件 View

Question

我创建了一个点击动态加载组件 View ，但我将每次点击分开。我想要一个函数，我通过函数传递一个字符串，而不是在我的函数中输入该字符串来加载 View 。

这是一个工作的plunker http://plnkr.co/edit/ZXsIWykqKZi5r75VMtw2?p=preview

组件

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Lets dynamically create some components!</h2>
      <button (click)="createHelloWorldComponent()">Create Hello World</button>
      <button (click)="createWorldHelloComponent()">Create World Hello</button>
      <dynamic-component [componentData]="componentData"></dynamic-component>
    </div>
  `,
})

export class App {
  componentData = null;

  createHelloWorldComponent(){

    this.componentData = {
      component: HelloWorldComponent,
      inputs: {
        showNum: 9
      }
    };
  }

  createWorldHelloComponent(){
    this.componentData = {
      component: WorldHelloComponent,
      inputs: {
        showNum: 2
      }
    };
  }
}

想要的是一个函数，并从数组中定义一个在(单击)中传递并加载 View 的变量。这是一个尝试的 plunker: http://plnkr.co/edit/HRKGhCCEfkOhNjXbr6C5?p=preview

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Lets dynamically create some components!</h2>

          <li *ngFor="let item of myMenu">

              <button (click)="loadView({{ item.viewname }})">{{ item.id }}</button>
         </li>

      <dynamic-component [componentData]="componentData"></dynamic-component>
    </div>
  `,
})
export class App {
  componentData = null;
   myMenu = {};
      constructor() {
        this.myMenu = myMenu;

      }

  loadView(viewName){

    this.componentData = {
      component: viewName,
      inputs: {
        showNum: 9
      }
    };
  }


}

const myMenu = [
    {
     id: 1, 
    viewname: 'HelloWorldComponent'
    },
    {
     id: 2, 
     viewname: 'WorldHelloComponent'

    },


];

Answer 1

使用下面的代码，

@Component({
  selector: 'my-app',
  template: `
    <div>
      <h2>Lets dynamically create some components!</h2>
      <button (click)="createComponent($event)">Create Hello World</button>
      <button (click)="createComponent($event)">Create World Hello</button>
      <dynamic-component [componentData]="componentData"></dynamic-component>
    </div>
  `,
})

并且组件方法会有如下代码

createComponent(val){
    if(val.srcElement.innerHTML==='Create Hello World')
    {
      this.createHelloWorldComponent()
    }
     if(val.srcElement.innerHTML==='Create World Hello'){
       this.createWorldHelloComponent()
     }
  }

LIVE DEMO 更新了你的 plunker。

更新 1:当您还没有准备好在 if 条件下处理它们时，您应该有一个映射属性以根据单击的项目返回 componentData。

var myComponents =[{
        id : 1,
        component: HelloWorldComponent,
        inputs: { showNum: 9 }
    },{
        id : 2,
        component: WorldHelloComponent,
        inputs: { showNum: 0 }
    }];
var myMenu =    [{
    id: 1, 
    viewname: 'HelloWorldComponent',
    componentID : 1
    },
    {
     id: 2, 
     viewname: 'WorldHelloComponent',
     componentID : 2
    }];

LIVE DEMO