blocks|key|1971323|text|问题是如何将people传递给组件。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1971324|假设您的组件是my-people，那么您应该按如下方式传递people|1971325|<my-people+[people]="peopleValue"+....+></my-people>|code-block|syntax|javascript|1971326|entityMap^0|6|6|0|7|9|T|6|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

The question is how do you pass <code>people</code> to your component.

Assuming that your component is <code>my-people</code> then you should pass <code>people</code> as following

<pre><code>&lt;my-people [people]="peopleValue" .... &gt;&lt;/my-people&gt;
</code></pre>

blocks|key|1967891|text|您无需手动执行任何操作即可跟踪更改，angular2框架会自动执行此操作，并确保将人员作为输入传递给子组件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1967892|假设mycomponent是您的子组件，people是输入|offset|length|style|BOLD|CODE|1967893|<mycomponent+[people]="peopleValue"+....+></mycomponent>|code-block|syntax|javascript|1967894|entityMap^0|0|K|6|K|6|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]|$D|T|E|U|F|H]]|9|@]|A|$]]|$1|I|3|J|5|K|7|V|8|@]|9|@]|A|$L|M]]|$1|N|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|O|$]]

You do not have to do anything manually inorder to track changes, angular2 framework automatically does that , make sure you pass the people as a input to your child component,

Assuming mycomponent is your child component and <code>people</code> is the input

<pre><code>&lt;mycomponent [people]="peopleValue" .... &gt;&lt;/mycomponent&gt;
</code></pre>

blocks|key|3946214|text|出于您的目的，Angular为您提供了two+way+binding，其中对模型的任何进一步更改都会自动重新选择到模板中，反之亦然。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3946215|示例：|3946216|列表组件|BOLD|3946217|@Component({
++++selector:+'my-comp',
++++template:+`<ul>
++++++++++++++++++++<li+*ngFor="let+item+of+people">{{item}}</li>
+++++++++++++++</ul>`
})

export+class+MyComp+{
++++@Input()+people:+string[];
}|code-block|syntax|javascript|3946218|使用|3946219|@Component({
++++selector:+'main-comp',
++++template:+'<my-comp+[people]="list"></my-comp>'
})


export+class+MainComp+{
++++private+list:+string[];

++++ngOnInit()+{
++++++++this.list=+['male',+'female'];
++++}
}|3946220|entityMap^0|J|F|0|0|0|4|0|0|0|2|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Y|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@$9|10|A|11|B|J]]|D|@]|E|$]]|$1|K|3|L|5|M|7|12|8|@]|D|@]|E|$N|O]]|$1|P|3|Q|5|6|7|13|8|@$9|14|A|15|B|J]]|D|@]|E|$]]|$1|R|3|S|5|M|7|16|8|@]|D|@]|E|$N|O]]|$1|T|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|U|$]]

For your purpose Angular provides you <code>two way binding</code> where any further changes to the model gets refelected to the template automatically and vice-versa.

Example:

List Component

<pre><code>@Component({
 selector: 'my-comp',
 template: `&lt;ul&gt;
 &lt;li *ngFor="let item of people"&gt;{{item}}&lt;/li&gt;
 &lt;/ul&gt;`
})

export class MyComp {
 @Input() people: string[];
}
</code></pre>

Usage

<pre><code>@Component({
 selector: 'main-comp',
 template: '&lt;my-comp [people]="list"&gt;&lt;/my-comp&gt;'
})


export class MainComp {
 private list: string[];

 ngOnInit() {
 this.list= ['male', 'female'];
 }
}
</code></pre>

I'm trying to get an better understanding of Angular 2. I am receiving a list of people from endpoint and periodically the list changes. People Component:

<pre><code>@Component({
 selector: 'people-display',
 template: &lt;ol class="people-list"&gt;
 &lt;li *ngFor="let person of people"&gt;
 &lt;attendees [people]="peopleValue"&gt;&lt;/attendees&gt;
 &lt;/li&gt;
 &lt;/ol&gt;
})
export class PeopleComponent implements OnChanges {
 @Input() people: string[];
}
</code></pre>

Attendees Component:

<pre><code>@Component({
 selector: 'attendees',
 templateUrl: '&lt;span&gt;{{attendees}}&lt;/span&gt;',
})
export class AttendeesComponent implements OnInit {
 constructor() { }
 ngOnInit() {}
}
</code></pre>

I've looked for a way to change automatically update my template whenever the value of input changes. I have yet to find a way of doing this. I've thought about doing a setTimout, but there has to be more efficient way. Can someone assist me or point me in the right direction? I need the ngFor to update dynamically.

Updating ngFor when Input value changes

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在尝试更好地理解Angular 2，我收到了来自endpoint的人员列表，并且该列表会定期更改。人员组件：@Component({ selector: 'people-display', template: <ol class="people-list"> <li *ngFo...

问在输入值发生变化时更新ngFor
EN

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