[英]loop through array or json file in angular 4
我想循環瀏覽角度為4的對象數組,我使用.ts
文件將數組導出為posts.ts
的變量
export var posts = [
{
"name":"art",
"title":"Art",
"items":[
{
"id": "1",
"title":"Tooling Up",
"author":"Amber Bravo",
"date":"June 14 2015",
"primaryColor":"#5a7785",
"secondaryColor":"#455a64",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/tooling-up-header-a13cfd9a.svg",
"desc":"How a new generation of prototyping tools at Google will help designers build better software.",
"content":"# content goes here"
},
{
"id": "2",
"title":"Expressing Brand in Material",
"author":"Viktor Persson & Rachel Been",
"date":"July 4 2015",
"primaryColor":"#202226",
"secondaryColor":"#333",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/article_brand_2x1_202226-fc539618.svg",
"desc":"Material design offers a system for designing functional and elegant software. How does your brand fit into the framework? We’ve created a step-by-step guide to staying on-brand while going material.",
"content":"# content goes here"
},
{
"id": "3",
"title":"New Design Tools",
"author":"Amber Bravo",
"date":"July 29 2015",
"primaryColor":"#3e50b4",
"secondaryColor":"#303fc3",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/150727_GD_Article_ToolingUpFurther_1x1Tile-01-86c8e03e.svg",
"desc":"See Also: (More) thoughts on design tools",
"content":"# content goes here"
}
]
},
{
"name":"film",
"title":"Film",
"items":[
{
"id": "1",
"title":"Design from iOS to Android (and Back Again)",
"author":"Roman Nurik & Viltor Persson",
"date":"Aug 20 2015",
"primaryColor":"#3e50b4",
"secondaryColor":"#303F9F",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/renditions/Article_iOS_to_Android_Header_3e50b4-f064882f-1240.png",
"desc":"A practical guide to designing across platforms",
"content":"# content goes here"
},
{
"id": "2",
"title":"Demystifying Density",
"author":"Sebastien Gabriel",
"date":"July 10 2015",
"primaryColor":"#00ccb8",
"secondaryColor":"#00b7a5",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/article_dpi_00ccb8-34fdd39e.svg",
"desc":"Sebastien Gabriel takes one for the team with his exhaustive guide to DPI & PPI",
"content":"# content goes here"
},
{
"id": "3",
"title":"Pixate and Form 1.3",
"author":"Google Design",
"date":"May 30 2015",
"primaryColor":"#eeeeee",
"secondaryColor":"#9e9e9e",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/pixate-and-form-1-3-header-2061f19f.svg",
"desc":"Discover the latest features and start designing native prototypes on your device.",
"content":"# content goes here"
},
{
"id": "4",
"title":"Welcome to the New Google Design",
"author":"Google Design",
"date":"Sep 10 2015",
"primaryColor":"#3367d6",
"secondaryColor":"#2755CC",
"image":"https://g-design.storage.googleapis.com/production/v5/assets/Article_Welcome_Header_2880-ce3ec22d.svg",
"desc":"More design, all the time",
"content":" # content goes here"
}
]
},
{
"name":"photography",
"title":"Photography",
"items":[]
},
{
"name":"design",
"title":"Design",
"items":[]
},
{
"name":"topten",
"title":"Top Ten",
"items":[]
},
{
"name":"aday",
"title":"A Day in the Life",
"items":[]
}
]
然后我通常將它導入到app.componenet.ts
:
import { posts } from './posts';
現在我不知道如何循環遍歷或如何加載json文件然后循環遍歷我的意思是如何在html中循環顯示app.componenet.html
數據
您必須傳遞此數組才能查看。
@Component(...)
class AppComponent {
posts = posts;
...
然后在視圖中您必須使用* ngFor指令。
<ng-container *ngFor="let post of posts">
{{ post.title }}
</ng-container>
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