angular2:使用动态组件，在点击提交按钮时将所有输入值传递给其他组件

Question

我创建了多个带有一些输入字段的动态组件。现在，我想在单击Submit按钮时将所有输入值发送到其他组件。

场景是，

• 连续5次点击添加按钮。现在，它将创建5行输入字段
然后，点击提交按钮，它将提醒所有输入值。在这里，我试图使用@Input/@Output的问题，但我不能让它运行。

砰砰作响

    import { Component, ViewContainerRef, ElementRef, ComponentRef, ComponentResolver, ViewChild } from '@angular/core';
@Component({
    template: `
    <div id=item{{_idx}} style="border: 1px solid red">Test Component   
      <input type="text"/> 
      <button (click)="remove()">Remove</button> 
      <button (click)="add1()">Add</button>
    </div>`
})
class DynamicCmp {
    _ref: ComponentRef;
    _idx: number;
    constructor(private resolver: ComponentResolver, private location:ViewContainerRef) { }
    remove() {
        this._ref.destroy();
    }
    add1() {
  this.resolver.resolveComponent(DynamicCmp).then((factory:ComponentFactory<any>) => {
      let ref = this.location.createComponent(factory, 0);
//        this._dcl.loadNextToLocation(DynamicCmp, this._e).then((ref) => {
            ref.instance._ref = ref;
            ref.instance._idx = this._idx++;
        });
    }
}

@Component({
    selector: 'my-app',
    template: `
<button (click) = "add()" > Add new component </button >
<button (click) = "submit()" > Submit </button >
<button (click) = "removeall()" > Remove All </button >
<div class="ttt11" id="ttt" #location ></div>
`    
})
export class AddRemoveDynamic {
    idx: number = 0;
    @ViewChild('location', {read: ViewContainerRef}) location:ViewContainerRef;
    constructor(private resolver: ComponentResolver) { }
    add() {
  this.resolver.resolveComponent(DynamicCmp).then((factory:ComponentFactory<any>) => {
      let ref = this.location.createComponent(factory)
//        this._dcl.loadIntoLocation(DynamicCmp, this._e, 'location').then((ref) => {
            ref.instance._ref = ref;
            ref.instance._idx = this.idx++;
        });
    }
    submit(){
    }
}

你能帮我一下吗?

非常感谢您的支持。

Answer 1

您需要跟踪您在父组件中创建的动态组件。

export class AddRemoveDynamic {
    private components = [];

然后当你创建一个新组件时，把它的组件ref推入组件数组

add() {
  this.resolver.resolveComponent(DynamicCmp).then((factory:ComponentFactory<any>) => {
      let ref = this.location.createComponent(factory)
//        this._dcl.loadIntoLocation(DynamicCmp, this._e, 'location').then((ref) => {
            ref.instance._ref = ref;
            ref.instance._idx = this.idx++;
            this.components.push(ref);
        });
    }

最后，提交时只需遍历组件数组并提取它的输入值。

submit(a: any){
      let componentThings = this.components.map((compRef) => compRef.instance.thing);
      alert(componentThings);
    }

工作恰好