Angular CLI - 如何在可重用组件中引用图像路径

问题描述

需要帮助找出如何将图像包含在另一个应用程序中引用的可重用组件中。

Need help figuring out how to include images in a reusable component that is referenced in another app.

例如，我有一个Angular App，我们称之为UI -Common，包含常用组件和另一个Angular App，我们称之为Command-Center，它将使用这些常用组件。

For example, I have an Angular App, let's call it UI-Common, that contains common components and another Angular App, let's call it Command-Center, that will use those common components.

在UI-Common中，有一个组件名为my-control.component，定义如下：

In UI-Common, there is a component called my-control.component that is defined as follows:

[my-control.component.html]

<div>
<img src="assets/images/myImage.png"/>
<div class"username" *ngIf="user">
    <p><strong>{{user.companyName}}</strong></p>
    <p>{{user.firstName + ' ' + user.lastName}}</p>
</div>

[my- control.component.ts]

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

import { User } from '../../models/user';

@Component({
    selector: 'my-control',
    templateUrl: './my-control.component.html',
    styleUrls: ['./my-control.component.scss'],
})
export class MyControlComponent {
    @Input() user: User;

    constructor() {

    }
}

在Command-Center中，它将UI-Common添加为package.json中的依赖项。创建一个Command-Center组件并使用my-control.component，如下所示：

In Command-Center, it adds UI-Common as a dependency in the package.json. A Command-Center component is created and uses my-control.component as follows:

[app.module.ts]

...
import { HomeComponent } from './home/home.component';
import { MyControlComponent } from 'ui-common';

@NgModule({
   declarations: [
      ...,
      HomeComponent,
      MyControlComponent,
      ...
   ],
   ...
})
export class AppModule { }

[home.component.html]

<my-control [user]=user></my-control>
<div class="homeContent">
    blah blah blah...
</div>

[home.component.ts]

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

import { User } from 'ui-common';

@Component({
  selector: 'app-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent {
  user: User;

  constructor() {
    this.user = new User();
    this.user.companyName = 'iHeartMedia';
    this.user.firstName = 'John';
    this.user.lastName = 'Smith';
  }
}

问题是运行时my-control上的图像来自Command-Center根本不加载。这似乎是因为在Command-Center中不存在使用assets / images / myImage.png的图像路径。我不想在Command-Center的assets文件夹中保存图像的副本。如何正确处理公共组件中的图像？

The problem is the image on my-control when running from Command-Center does not load at all. This appears to be because the image path being used "assets/images/myImage.png" does not exist in Command-Center. I don't want to save a copy of the image in the Command-Center's assets folder. How do I properly handle images in the common component?

推荐答案

找到此Angular CLI功能请求：

Found this Angular CLI feature request: https://github.com/angular/angular-cli/issues/3555

Angular应用程序可以配置为将文件从相对文件路径复制到应用程序分发目录中的文件夹。这使我们可以从node_modules文件夹中访问图像，而无需手动将图像复制到本地资产文件夹中。

The Angular app can be configured to copy files from a relative file path to a folder within the app's distribution directory. This allows us to get access to images from within the node_modules folder without having to manually copy the images into the local assets folder.

更新到最新版本的Angular CLI后（1.2.1）我修改了我的angular-cli.json文件，如下所示：

After updating to the latest version of Angular CLI (1.2.1) I modified my angular-cli.json file as follows:

{
...
"apps": [
    {
      "root": "src",
      "outDir": "dist",
      "assets": [
        "assets",
        "favicon.ico",
        "version.txt",
        {
          "glob": "**/*",
          "input": "../node_modules/ui-common/src/assets/images",
          "output": "./assets/images"
        }
      ],
...
}

现在UI-Common应用程序中的所有图像都可以访问命令中心应用程序。

Now all images that are in the UI-Common app are accessible to the Command-Center app.

此处有关配置的更多详细信息：

More details about the configuration here: https://github.com/angular/angular-cli/wiki/stories-asset-configuration

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