[Angular 2] Create template with Params

最新推荐文章于 2024-11-27 02:21:09 发布

转载最新推荐文章于 2024-11-27 02:21:09 发布 · 55 阅读

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原文链接：http://www.cnblogs.com/Answer1215/p/5901625.html

文章标签：

#javascript #ViewUI

本文介绍了Angular2中如何使用特殊的let语法定义和传递上下文到模板。通过ViewChild装饰器获取视图容器引用，并利用ComponentFactoryResolver创建组件实例。演示了如何通过createEmbeddedView方法将特定的对象作为上下文传递给模板。

Angular 2 templates have a special let syntax that allows you to define and pass a context when they’re being generated.

import {Component, ViewChild, ViewContainerRef, ComponentFactoryResolver, ViewChild} from '@angular/core';
import {SimpleService} from "../../serivces/simple.service";
import {WidgetThree} from "../widgets/widget-three.component";

@Component({
    moduleId: module.id,
    selector: 'home',
    templateUrl: 'home.component.html'
})
export class HomeComponent {

    @ViewChild('container', {
        read: ViewContainerRef
    }) container;
    @ViewChild('template') template;

    constructor(private resolver: ComponentFactoryResolver, private simpleService: SimpleService) {
    }

    ngAfterContentInit(){
        const WidgetFactory = this.resolver.resolveComponentFactory(WidgetThree);
        this.container.createComponent(WidgetFactory);
        this.container.createComponent(WidgetFactory);
        this.container.createComponent(WidgetFactory);
        this.container.createComponent(WidgetFactory);
        this.container.createComponent(WidgetFactory);
    }

    onClick(){
        this.container.createEmbeddedView(
            this.template,
            {
                desc: 'Good'
            }
        )
    }

}

We pass in an Object "desc: Good", to the template, in tempalte, we use "let-" keyword to define the variable which we can reference to, and the object will be the 'context' for the template.

<template #template let-desc="desc">
    <h3>tempalte {{desc}}</h3>
    <section>tempalte {{desc}}</section>
    <footer>template {{desc}}</footer>
</template>